CN106499121B - Busting reinforcement concrete with Negative poisson's ratio and preparation method thereof - Google Patents
Busting reinforcement concrete with Negative poisson's ratio and preparation method thereof Download PDFInfo
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- CN106499121B CN106499121B CN201610971051.8A CN201610971051A CN106499121B CN 106499121 B CN106499121 B CN 106499121B CN 201610971051 A CN201610971051 A CN 201610971051A CN 106499121 B CN106499121 B CN 106499121B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
- E04C5/0609—Closed cages composed of two or more coacting cage parts, e.g. transversally hinged or nested parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/39—Building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, for forming soffits, cornices, or shelves, for fixing wall-plates or door-frames, for claustra
Abstract
Bar construction unit with Negative poisson's ratio is made of the n-layer reinforcing bar hinge of parallel arrangement, and the reinforcing bar hinge is the axial symmetry polygonized structure with interior re-entrant angle.Interlamellar spacing is 30mm-150mm；Symmetric polygonal structure is six rib concave inward structures, eight rib concave inward structures, ten rib concave inward structures or 12 rib concave inward structures.Interior re-entrant angle size is respectively β1=90 ° -150 °, β2=100 ° -160 °, β3=110 ° -160 °, β4=110 ° -170 °；The circumscribed circle diameter of the axial symmetry polygon is 90mm-160mm.The invention also discloses the busting reinforcement concrete with Negative poisson's ratio being made of the above-mentioned bar construction unit for having poured concrete with and preparation method thereof.Compared with ordinary reinforced concrete, busting reinforcement concrete storage modulus prepared by the present invention maximum can improve 483%；To which resistance be substantially improved and absorb the ability of blast load energy.
Description
Technical field
The invention belongs to building field, it is related to a kind of armored concrete and preparation method thereof, specifically, being related to a kind of tool
There is the busting reinforcement concrete and preparation method thereof of Negative poisson's ratio.
Background technique
In recent years, domestic, international community explosive incident emerges one after another.It is broken for person property caused by blast load
Bad, measure the most direct is the effective infrastructure explosion-proof lamp of design.However, the design concept master of conventional concrete
If improving self-strength, can not play a positive role for the elimination of blast process dredged with energy transmission.And from power
Angle analysis is learned, the basic problem of explosion is energy and non-force.Therefore, when the density of load is more than critical strength, tradition is mixed
Solidifying soil has the explosion products such as broken concrete or the metal fragmentation of huge kinetic energy by directly release, realizes energy release, because
This, easily causes the secondary injury to personal property.Currently, building trade more requires armored concrete to be high-strength and steady
It is fixed, although the research and development of its explosion-proof performance are also reported, but still it is confined to realize antiknock by improving self-strength.Mesh
Before, in terms of the Reinforcement Design of the armored concrete for building structure such as weight bodies is concentrated mainly on the ratio of reinforcement and strength control,
Concern is had no to the specific form and spread pattern of reinforcing bar.
The negative of transverse strain and longitudinal strain ratio when Poisson's ratio refers to material stress and deformation is outside reflection material is resisted
One important parameter of portion's load-carrying ability.Poisson's ratio is smaller, and material transverse strain during stress and deformation is bigger；On the contrary, then
It is smaller.The Poisson's ratio of general material is between 0 to 0.7.Common material occurs necking penomena when being acted on by longitudinal tension stress,
Its Poisson's ratio is positive value.And negative poisson's ratio material, i.e. auxetic materials (Auxetic is originated from Greek), deformation is then opposite.Negative pool
It is laterally expanded in elastic range when pine stretches than concrete in tension, the transverse direction of material is shunk instead when compressed, is had
Effect resists shearing force, absorbs the external energy discharged significantly.Negative poisson's ratio material relies on its Negative poisson's ratio, has excellent
Elasticity modulus, break resistance and rebound toughness.The development of negative poisson's ratio material had more than 30 years, and application is concentrated mainly on
The fields such as foamed material, lumbar disc prosthesis material, artificial blood vessel's alternative materials.In field of explosion, once someone was by curtain design
Negative poisson's ratio is out to realize explosion-proof purpose.However, there is presently no the correlation reports of negative poisson's ratio concrete in building field
Road, being applied to anti-explosion engineering is even more to have never heard of.
To solve conventional concrete in the defect of explosion-proof aspect, the mesh for safely and effectively reducing loss caused by explosion is realized
, the concept that the present invention plans " Negative poisson's ratio " introduces concrete structure material field.It will be provided with the negative pool of explosion prevention function
Pine is applied to the industrial pipelines such as civilian, military building masonry wall or natural gas, petroleum than concrete, so that being subjected to blast load
When effect, wall or pipeline are shunk and unexpansive in the normal orientation of firing pulse.
Summary of the invention
For existing armored concrete at the problems of explosion-proof aspect, busting reinforcement concrete of the present invention is logical
Negative poisson's ratio design is crossed, blast load energy can be effective against and absorb, to realize to building structure and its inside
Personal safety as well as the property safety is protected to greatest extent.
The technical scheme is that with Negative poisson's ratio bar construction unit, the bar construction unit by
The n-layer reinforcing bar hinge of parallel arrangement forms, and the reinforcing bar hinge is the axial symmetry polygonized structure with interior re-entrant angle.Wherein, institute
State n=2-4, interlamellar spacing 30mm-150mm；The axial symmetry polygonized structure be six rib concave inward structures, eight rib concave inward structures,
Ten rib concave inward structures or 12 rib concave inward structures；The six ribs concave inward structure is as shown in Figure 1a, and the eight ribs concave inward structure is as schemed
Shown in 1b, as illustrated in figure 1 c, the 12 rib concave inward structure is as shown in Figure 1 d for the ten ribs concave inward structure.The interior re-entrant angle size
Respectively β1=90 ° -150 °, β2=100 ° -160 °, β3=110 ° -160 °, β4=110 ° -170 °；The bar construction unit
Axial symmetry polygon circumscribed circle diameter be 90mm-160mm.
Busting reinforcement concrete with Negative poisson's ratio, if the busting reinforcement concrete is by having poured concrete
Dry bar construction unit composition；The bar construction unit is the above-mentioned bar construction unit with Negative poisson's ratio.
Wherein, each bar construction unit further includes the fixed steel bars of vertical direction, every layer of reinforcing bar hinge
Plane is vertical with fixed steel bars；The direction of the interior re-entrant angle is consistent with the direction of propagation of blast load.
Wherein, forming between the multiple bar construction unit of busting reinforcement concrete is ordered arrangement；It is described orderly
It is arranged as oriented and ordered closely spaced array (the special complete ordering arrangement fashioned iron reinforced concrete of concave inward structure), oriented and ordered interlayer array
(special indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), oriented and ordered interlayer intersection mosaic array are (special
Indent/ordinary construction ABA item inlays arrangement fashioned iron reinforced concrete), as shown in Figure 6.
Wherein, reinforcing bar used is hot rolling plain bar, hot-rolled strip Rib Reinforced reinforcement, hot-rolled strip etc. in reinforced concrete structure
High rib reinforcement, waste heat treatment steel bar, steel strand wires, cold rolled reinforcing steel bar with ribs, cold drawn bar, cold drawn wire, one in cold-rolled torsion steel bar
Kind or several, one or more of model 6,8,10,12,14,16,18,20,22,24,28,32mm.
Realize the design principle and comparative test of negative poisson's ratio: the present invention designs the reinforcing bar hinge arrangement of five kinds of forms altogether,
One kind is regular reinforcement structure (square), remaining four kinds are the special concave inward structure with Negative poisson's ratio: six rib indents
Structure, eight rib concave inward structures, ten rib concave inward structures or 12 rib concave inward structures.Below with six rib concave inward structures, eight rib indent knots
It is illustrated for structure.
This six ribs concave inward structure, eight rib concave inward structures hinge arrangement in, separately design 90 ° -150 ° and 100 ° -160 °
Interior re-entrant angle.In both special constructions, the pressure such as the direction Fig. 2 is carried out respectively to it, both structures will be in such as Fig. 3 institute
It is shunk on the direction shown, to realize Negative poisson's ratio.
For regular reinforcement structure (square), six rib concave inward structures and eight rib concave inward structures, every kind of steel construction selects two
Layer is made into bar construction unit as shown in Figure 4 with reinforcing bar connection.As shown, two layers inside each bar construction unit
The identical parallel polygons of structure are arranged vertically by diagram direction and fixed steel bars；And the direction of interior re-entrant angle and blast load pass
It is consistent to broadcast direction.
In order to realize that best explosion-proof effect, the arrangement mode between each bar construction unit are also extremely important, it is necessary to adopt
It is (special with oriented and ordered closely spaced array (the special complete ordering arrangement fashioned iron reinforced concrete of concave inward structure), oriented and ordered interlayer array
Different indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), oriented and ordered interlayer intersect mosaic array (in special
Recessed/ordinary construction ABA item inlays arrangement fashioned iron reinforced concrete) one of ordered arrangement, respectively such as Fig. 6 a, Fig. 6 b and figure
Shown in 6c.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the preparation method is that precast framework method,
The following steps are included: (1) prepares: according to the needs of bar construction unit, reinforcing bar successively being polished, is bent and cut；(2)
It is fixed: the reinforcing bar of well cutting being fixed as to the axial symmetry polygonized structure with interior re-entrant angle, then n-layer is had to the axis of interior re-entrant angle
The fixation of symmetric polygonal structure obtains bar construction unit, finally by bar construction unit ordered arrangement, obtains precast reinforced knot
Structure template；(3) paint: step (2) preparation precast reinforced stay in place form surface primer coating, enhancing interfacial adhesion with
Deformation concertedness；(4) it pours: according to the proportion design mixed concrete of concrete, and being poured into the pre- of step (3) preparation
In bar construction template processed, maintenance is stood, the busting reinforcement concrete with Negative poisson's ratio is obtained.Wherein, shown in fig. 5
Arrow direction is the loading direction of concrete structure load-bearing.
Wherein, the axial symmetry polygonized structure is six rib concave inward structures, eight rib concave inward structures, ten rib concave inward structures or ten
Two rib concave inward structures；The interior re-entrant angle is respectively β1=90-150 °, β2=100-160 °, β3=110-160 °, β4=110-
170°；The circumscribed circle diameter of the axial symmetry polygon of the bar construction unit is 90mm-160mm.
Wherein, the bar construction unit includes the n-layer reinforcing bar hinge of parallel arrangement and the fixed steel bars of vertical direction, often
The plane of the layer reinforcing bar hinge is vertical with fixed steel bars；The direction of the interior re-entrant angle is consistent with the direction of propagation of blast load.
Wherein, the ordered arrangement is that oriented and ordered closely spaced array, oriented and ordered interlayer array or oriented and ordered interlayer are handed over
Pitch mosaic array.
Wherein, the specific steps that reinforcing bar is polished in step (1) are as follows: reinforcing bar is polished smooth, the reinforcing bar that become rusty is carried out simple
Processing of rust removing facilitates experimental implementation.The specific steps of bar bending are as follows: according to the form size of designed reinforcing bar hinge arrangement
And angle, required shape is gradually curved using angle-bender.The specific steps of reinforcing bar cutting are as follows: to the bar construction being bent
Preparatory processing is carried out, redundance is cut.
Wherein, the fixed specific steps of reinforcing bar in step (2) are as follows: make the reinforcing bar of well cutting by the way of binding and pour
Position when building in a mold is fixed；Intersection point is tied with iron wire, this experiment using one side along button method, first by iron wire pair when binding
It is converted into button, then wears reinforcing bar crosspoint down, iron wire both ends are intersected, are vised with pliers, rotation 2-3 circle, the iron wire of stretching is buckled long
Degree is answered moderate, is turned fast convenient for few and is pricked, can also improve efficiency while tying.
Wherein, priming paint described in step (3) is epoxy resin primer, poly phenol oxygen priming paint, alkyd amino base coat, zinc yellow
One or more of polyurethane primer, iron red alcohol acid resin primer, acrylic primer, polyureas priming paint.
In order to obtain according to the Poisson ratio of the busting reinforcement concrete of above method preparation, the application uses following methods
Test block is detected.
(1) test method
Common test block is resisted referring to " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081-2002)
The test of Compressive Strength.This kind of test block is tested using full-automatic pressure testing machine.
In order to accurately measure the consecutive variations situation of test block shape after the load that is under pressure, test uses the smallest load
Speed is loaded, and test block loading speed is 0.1MPa/s, while load, uses the complete of industrial camera shooting test block load
Process, until macroscopic failure occurs in test block.
(2) testing procedure
1. the test block of maintenance to stipulated time is taken out from fog room, put it into dry straight in electric drying oven with forced convection
It to constant weight, then takes out, is cooled to room temperature.
2. the test zone of test block surface (side) is uniformly sprayed first it is pitch-dark, then with the random sprinkling of white spray painting
On pitch-dark surface, the purpose handled in this way is for the ease of observation, to meet the needs of digital speckle method test.
3. it is to be painted parch after, test block is placed on the bearing plate of pressure testing machine, and guarantee bearing plate and test block
The center of compression face is overlapped.
4. starting testing machine, lower platen is slowly risen, when test block is soon contacted with top board, adjustment knob is at a slow speed
Rise, to contact board uniformly with test block compression face.
5. test parameter is arranged, start to test after clearing, until test specimen generates macroscopic failure.And in the same of loading procedure
When, it is continuously taken pictures with industrial camera, each period that the test block of different moments is destroyed is recorded in real time.
6. data processing: carrying out correlation analysis using DSCM software (exploitation of engineering mechanics system of Tsinghua University).This method
Deficiency of the DSCM method fitted using related coefficient interpolation in terms of measuring big strain displacement field is largely compensated for,
Deformation of concrete sample in the case where uniaxial compression can be studied, and the variation of displacement field and strain field can be provided simultaneously.
Beneficial effects of the present invention:
(1) the innovative reinforcing bar by way of designing bar construction unit and in angle and concrete of the present invention
The stacked array of structural unit is distributed to obtain the precast reinforced stay in place form for having negative poisson's ratio；Then precast framework method is used,
And the priming paint of interfacial adhesion Yu deformation concertedness can be effectively improved in the coating of precast framework surface, preparation has negative poisson's ratio effect
The busting reinforcement concrete answered.
(2) compared with Poisson's ratio is the conventional concrete of positive value, busting reinforcement concrete Poisson's ratio prepared by the present invention is
Negative value so that the absorbability to blast load be greatly improved, and largely keeps original structure not to be destroyed.
(3) present invention by Negative poisson's ratio design, preparation with six rib concave inward structure of layer 2-4, eight rib concave inward structures,
Ten rib concave inward structures or 12 rib concave inward structures, using oriented and ordered closely spaced array, oriented and ordered interlayer array or oriented and ordered
Interlayer intersects the busting reinforcement concrete of mosaic array arrangement mode, and the Poisson ratio minimum with different structure unit respectively can
Reach -0.14, -0.59, -0.71, -0.87.Compared with ordinary reinforced concrete, storage modulus can maximum be respectively increased
152%, 307%, 391%, 483%；To which resistance be substantially improved and absorb the ability of blast load energy, blast process is avoided
In directly discharge explosion product secondary injury caused to building structure and its internal personal property, thus realize to building structure and
Its internal personal safety as well as the property safety is protected to greatest extent.
Detailed description of the invention
Fig. 1 is the reinforcing bar hinge arrangement figure for having Negative poisson's ratio in the present invention, and Fig. 1 a is six rib concave inward structures, Fig. 1 b
It is ten rib concave inward structures for eight rib concave inward structures, Fig. 1 c, Fig. 1 d is 12 rib concave inward structures.
Fig. 2 be six rib concave inward structures, eight rib concave inward structures reinforcing bar hinge Impact direction schematic diagram.
Fig. 3 is the schematic diagram of the shrinkage direction after reinforcing bar hinge stress shown in Fig. 2.
Fig. 4 is the bar construction cell schematics using different reinforcing bar hinge arrangements；Fig. 4 a is regular reinforcement structure, Fig. 4 b
For six rib concave inward structures, Fig. 4 c is eight rib concave inward structures.
Fig. 5 is the perspective view using the armored concrete test block of different reinforcing bar hinge arrangements；Fig. 5 a is ordinary mortar
Concrete, Fig. 5 b are ordinary reinforced concrete, and Fig. 5 c is six rib indent armored concrete；Fig. 5 d is eight rib indent reinforced concretes
Soil.
Fig. 6 is the schematic diagram of three kinds of ordered arrangements of bar construction unit；Fig. 6 a is oriented and ordered closely spaced array, Fig. 6 b
For oriented and ordered interlayer array, Fig. 6 c is that oriented and ordered interlayer intersects mosaic array.
Specific embodiment
The present invention will be further explained with reference to the examples below.
Embodiment 1:
Bar construction unit with Negative poisson's ratio, the bar construction unit are cut with scissors by 2 layers of reinforcing bar of parallel arrangement
Chain composition, interlamellar spacing 100mm, the reinforcing bar hinge are six rib concave inward structures, circumscribed circle diameter 100mm；The interior re-entrant angle
For β1=90 °, the reinforcing bar selects No. 10 hot rolling plain bars.
Busting reinforcement concrete with Negative poisson's ratio, the busting reinforcement concrete is by having poured the more of concrete
A above-mentioned bar construction unit composition.Each bar construction unit further includes the fixed steel bars of vertical direction, described in every layer
The plane of reinforcing bar hinge is vertical with fixed steel bars；The direction of the interior re-entrant angle is consistent with the direction of propagation of blast load.Composition is anti-
It is that (special concave inward structure is complete ordering for oriented and ordered closely spaced array between the multiple bar construction unit of quick-fried armored concrete
Arrange fashioned iron reinforced concrete), as shown in Figure 6 a.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the preparation method is that precast framework method,
The following steps are included:
(1) prepare: according to the needs of bar construction unit, reinforcing bar successively being polished, is bent and cut；Reinforcing bar polishing
Specific steps are as follows: reinforcing bar is polished smooth, to having become rusty, reinforcing bar carries out simple processing of rust removing, facilitates experimental implementation.Bar bending
Specific steps are as follows: according to the form size and angle of designed reinforcing bar hinge arrangement, gradually curved using angle-bender
Required shape.The specific steps of reinforcing bar cutting are as follows: preparatory processing is carried out to the bar construction being bent, cuts redundance.
(2) fixed: the reinforcing bar of well cutting being fixed as six rib concave inward structures, then fixes 2 layer of six rib concave inward structure
To bar construction unit, finally by bar construction unit ordered arrangement, precast reinforced stay in place form is obtained；What the reinforcing bar was fixed
Specific steps are as follows: position when being made the reinforcing bar of well cutting by the way of binding and poured in a mold is fixed；Intersection point is used
Iron wire ties, and using one side along button method, iron wire is first folded in half by when binding to be buckled for this experiment, reinforcing bar crosspoint is then worn down, by iron
Silk both ends intersect, and are vised with pliers, rotation 2-3 circle, and the iron wire of stretching buckles length and answers moderate, turn fast convenient for few and prick, what is tied is same
When can also improve efficiency.
(3) it paints: in the surface primer coating of the precast reinforced stay in place form of step (2) preparation, enhancing interfacial adhesion
With deformation concertedness；The priming paint is epoxy resin primer.
(4) it pours: according to the proportion design mixed concrete of concrete, and being poured into the prefabricated of step (3) preparation
In bar construction template, maintenance is stood, the busting reinforcement concrete with Negative poisson's ratio is obtained.Wherein, arrow shown in fig. 5
Head direction is the direction of concrete structure bearing load.
Comparative test: using regular reinforcement structure (square), and each bar construction unit is respectively adopted layer 2-4, uses steel
Muscle connection is made into bar construction unit as shown in Figure 4.Remaining condition is identical as above-mentioned busting reinforcement concrete.
In order to obtain according to the Poisson's ratio of the busting reinforcement concrete of above method preparation, the application uses following methods pair
Test block is detected.
(1) test method
Common test block is resisted referring to " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081-2002)
The test of Compressive Strength.This kind of test block is tested using full-automatic pressure testing machine.
In order to accurately measure the consecutive variations situation of test block shape after the load that is under pressure, test uses the smallest load
Speed is loaded, and test block loading speed is 0.1MPa/s, while load, uses the complete of industrial camera shooting test block load
Process, until macroscopic failure occurs in test block.
(2) testing procedure
1. the test block of maintenance to stipulated time is taken out from fog room, put it into dry straight in electric drying oven with forced convection
It to constant weight, then takes out, is cooled to room temperature.
2. the test zone of test block surface (side) is uniformly sprayed first it is pitch-dark, then with the random sprinkling of white spray painting
On pitch-dark surface, the purpose handled in this way is for the ease of observation, to meet the needs of digital speckle method test.
3. it is to be painted parch after, test block is placed on the bearing plate of pressure testing machine, and guarantee bearing plate and test block
The center of compression face is overlapped.
4. starting testing machine, lower platen is slowly risen, when test block is soon contacted with top board, adjustment knob is at a slow speed
Rise, to contact board uniformly with test block compression face.
5. test parameter is arranged, start to test after clearing, until test specimen generates macroscopic failure.And in the same of loading procedure
When, it is continuously taken pictures with industrial camera, each period that the test block of different moments is destroyed is recorded in real time.
6. data processing: carrying out correlation analysis using DSCM software (exploitation of engineering mechanics system of Tsinghua University).This method
Deficiency of the DSCM method fitted using related coefficient interpolation in terms of measuring big strain displacement field is largely compensated for,
Deformation of concrete sample in the case where uniaxial compression can be studied, and the variation of displacement field and strain field can be provided simultaneously.
Embodiment 2:
Unlike the first embodiment, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
3 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 50mm, the concave inward structure circumscribed circle diameter are 120mm, the interior re-entrant angle
For β1=120 °, the reinforcing bar selects No. 12 waste heat treatment steel bars.
Busting reinforcement concrete with Negative poisson's ratio forms the multiple bar construction of busting reinforcement concrete
It is oriented and ordered interlayer array (special indent/ordinary construction level alternating ordered arrangement fashioned iron reinforced concrete) between unit, such as
Shown in Fig. 6 b.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is poly-
Phenol oxygen priming paint.
Embodiment 3:
Unlike the first embodiment, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
4 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 30mm, the concave inward structure circumscribed circle diameter are 130mm, the interior re-entrant angle
For β1=150 °, the reinforcing bar selects No. 14 cold rolled reinforcing steel bar with ribs.
Busting reinforcement concrete with Negative poisson's ratio forms the multiple bar construction of busting reinforcement concrete
It is that (special indent/ordinary construction ABA item inlays arrangement steel bar coagulation to oriented and ordered interlayer intersection mosaic array between unit
Soil), as fig. 6 c.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is ammonia
Base alkyd base coat.
Embodiment 4:
Unlike the first embodiment, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
3 layers of reinforcing bar hinge composition of row arrangement, the reinforcing bar hinge are eight rib concave inward structures, interlamellar spacing 50mm, the concave inward structure
Circumscribed circle diameter is 90mm, the indent angle beta2=100 °, the reinforcing bar selects No. 6 hot rolling plain bars.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer intersection inlays battle array
Column (special indent/ordinary construction ABA item inlays arrangement fashioned iron reinforced concrete), as fig. 6 c.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is zinc
Yellow polyurethane primer.
Embodiment 5:
As different from Example 4, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
2 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 90mm, the concave inward structure circumscribed circle diameter are 110mm, the interior re-entrant angle
β2=120 °, the reinforcing bar selects No. 12 cold rolled reinforcing steel bar with ribs.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer array is (special
Indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), as shown in Figure 6 b.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is iron
Red alkyd primer.
Embodiment 6:
As different from Example 4, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
2 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 80mm, the concave inward structure circumscribed circle diameter are 100mm, the interior re-entrant angle
β2=150 °, the reinforcing bar selects No. 12 cold rolled reinforcing steel bar with ribs.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer array is (special
Indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), as shown in Figure 6 b.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is ammonia
Base alkyd base coat.
Embodiment 7:
As different from Example 4, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
4 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 40mm, the concave inward structure circumscribed circle diameter are 150mm, the interior re-entrant angle
β2=160 °, the reinforcing bar selects the high rib reinforcements such as No. 10 hot-rolled strips.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered closely spaced array is (special
Concave inward structure is complete ordering arrangement fashioned iron reinforced concrete), as shown in Figure 6 a.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is third
Olefin(e) acid priming paint.
Embodiment 8:
Unlike the first embodiment, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
Row arrangement 2 layers of reinforcing bar hinge composition, the reinforcing bar hinge be the eight rib concave inward structures with interior re-entrant angle, interlamellar spacing 100mm,
The concave inward structure circumscribed circle diameter is 160mm, the indent angle beta3=110 °, the reinforcing bar selects the high ribs such as No. 16 hot-rolled strips
Reinforcing bar.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered closely spaced array is (special
Concave inward structure is complete ordering arrangement fashioned iron reinforced concrete), as shown in Figure 6 a.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is poly-
In urea priming paint.
Embodiment 9:
As different from Example 8, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
3 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 50mm, the concave inward structure circumscribed circle diameter are 140mm, the interior re-entrant angle
β3=135 °, the reinforcing bar selects the high rib reinforcements such as No. 12 hot-rolled strips.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer array is (special
Indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), as shown in Figure 6 b.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is zinc
Yellow polyurethane primer.
Embodiment 10:
As different from Example 8, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
4 layers of reinforcing bar hinge composition of row arrangement, interlamellar spacing 40mm, the concave inward structure circumscribed circle diameter are 160mm, the interior re-entrant angle
β3=160 °, the reinforcing bar selects the high rib reinforcements such as No. 16 hot-rolled strips.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer array is (special
Indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), as fig. 6 c.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is ammonia
Base alkyd base coat.
Embodiment 11:
Unlike the first embodiment, with the bar construction unit of Negative poisson's ratio, the bar construction unit is by putting down
3 layers of reinforcing bar hinge composition of row arrangement, the reinforcing bar hinge are 12 rib concave inward structures, interlamellar spacing 50mm, the indent knot
Structure circumscribed circle diameter is 130mm, the indent angle beta4=110 °, the reinforcing bar selects the high rib reinforcements such as No. 12 hot-rolled strips.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered closely spaced array is (special
Concave inward structure is complete ordering arrangement fashioned iron reinforced concrete), as shown in Figure 6 a.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is ammonia
Base alkyd base coat.
Embodiment 12:
As different from Example 11, with Negative poisson's ratio bar construction unit, the bar construction unit by
4 layers of reinforcing bar hinge of parallel arrangement form, interlamellar spacing 35mm, and the concave inward structure circumscribed circle diameter is 90mm, the indent
Angle is β4=140 °, the reinforcing bar selects No. 6 hot rolling plain bars.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer array is (special
Indent/ordinary construction level replaces ordered arrangement fashioned iron reinforced concrete), as shown in Figure 6 b.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is third
Olefin(e) acid priming paint.
Embodiment 13:
As different from Example 11, with Negative poisson's ratio bar construction unit, the bar construction unit by
2 layers of reinforcing bar hinge of parallel arrangement form, interlamellar spacing 80mm, and the concave inward structure circumscribed circle diameter is 110mm, the indent
Angle is β4=170 °, the reinforcing bar selects the high rib reinforcements such as No. 10 hot-rolled strips.
Busting reinforcement concrete with Negative poisson's ratio, the ordered arrangement are that oriented and ordered interlayer intersection inlays battle array
Column (special indent/ordinary construction ABA item inlays arrangement fashioned iron reinforced concrete), as fig. 6 c.
The preparation method of busting reinforcement concrete with Negative poisson's ratio, the priming paint that the step (3) uses is ring
Oxygen resin primer.
The structural parameters and Poisson ratio of the busting reinforcement concrete of 1 embodiment 1-13 of table preparation
Wherein, I, II, III are respectively oriented and ordered closely spaced array, oriented and ordered interlayer array, oriented and ordered interlayer intersection
Mosaic array.
According to the result of above-described embodiment it is found that the form of the axial symmetry polygon of bar construction unit, the number of plies, interior re-entrant angle
To the Poisson ratio of armored concrete, there are important influences for size, arrangement mode.It can be effectively real by control factors above
The Negative poisson's ratio of existing armored concrete.In addition, the technological design of axial symmetry polygon layers spacing, reinforcing bar primer coating is equivalent
Sample has greater significance to the explosion-proof performance of material.The structural unit and its arrangement mode of optimization design of the present invention, have filled up and have built
It builds material and designs blank for explosion-proof, antiknock field " negative poisson's ratio ", there is great actual application prospect.
Claims (8)
1. with Negative poisson's ratio bar construction unit, it is characterised in that: the bar construction unit by parallel arrangement n
Layer reinforcing bar hinge composition, the reinforcing bar hinge are the axial symmetry polygonized structure with interior re-entrant angle；
The n=2-4, interlayer spacing are 30mm-150mm；The axial symmetry polygonized structure is six rib concave inward structures, in eight ribs
Recessed structure, ten rib concave inward structures or 12 rib concave inward structures.
2. the bar construction unit according to claim 1 with Negative poisson's ratio, it is characterised in that: in six rib
The interior re-entrant angle of recessed structure is β1, the interior re-entrant angle of the eight ribs concave inward structure is β2, the interior re-entrant angle of the ten ribs concave inward structure is β3,
The interior re-entrant angle of the 12 rib concave inward structure is β4；The interior re-entrant angle size is respectively β1=90 ° -150 °, β2=100 ° -160 °,
β3=110 ° -160 °, β4=110 ° -170 °；The circumscribed circle diameter of the axial symmetry polygon of the bar construction unit is 90mm-
160mm。
3. the busting reinforcement concrete with Negative poisson's ratio, it is characterised in that: the busting reinforcement concrete is by pouring
Multiple bar construction units of concrete form；The bar construction unit is made of the n-layer reinforcing bar hinge of parallel arrangement, described
Reinforcing bar hinge is the axial symmetry polygonized structure with interior re-entrant angle；
The n=2-4；Interlayer spacing is 30mm-150mm；The axial symmetry polygonized structure is six rib concave inward structures, in eight ribs
Recessed structure, ten rib concave inward structures or 12 rib concave inward structures；The interior re-entrant angle of the six ribs concave inward structure is β1, the eight ribs indent
The interior re-entrant angle of structure is β2, the interior re-entrant angle of the ten ribs concave inward structure is β3, the interior re-entrant angle of the 12 rib concave inward structure is β4；
The interior re-entrant angle is respectively β1=90-150 °, β2=100-160 °, β3=110-160 °, β4=110-170 °；The reinforcing bar knot
The circumscribed circle diameter of the axial symmetry polygon of structure unit is 90mm-160mm.
4. the busting reinforcement concrete according to claim 3 with Negative poisson's ratio, it is characterised in that: composition is explosion-proof
The multiple bar construction unit of armored concrete is distributed as ordered arrangement in concrete substrate；The ordered arrangement is
Oriented and ordered closely spaced array, oriented and ordered interlayer array, oriented and ordered interlayer intersect one of mosaic array.
5. the busting reinforcement concrete according to claim 3 with Negative poisson's ratio, it is characterised in that: each described
Bar construction unit further includes the fixed steel bars of vertical direction, and the plane of every layer of reinforcing bar hinge is vertical with fixed steel bars；Institute
The direction for stating interior re-entrant angle is consistent with the direction of propagation of blast load.
6. the preparation method of the busting reinforcement concrete with Negative poisson's ratio, it is characterised in that: the preparation method is that pre-
Skeleton method processed, comprising the following steps: (1) prepare: according to the needs of reinforcing bar hinge, reinforcing bar successively being polished, is bent and cut
It cuts；(2) fixed: the reinforcing bar of well cutting being fixed as to the axial symmetry polygonized structure with interior re-entrant angle, n-layer is then had into indent
The axial symmetry polygonized structure fixation at angle obtains bar construction unit, finally by bar construction unit ordered arrangement, obtains prefabricated
Bar construction template；(3) paint: in the surface primer coating of the precast reinforced stay in place form of step (2) preparation, enhancing interface is attached
Put forth effort and deformation concertedness；(4) it pours: according to the proportion design mixed concrete of concrete, and being poured into step (3) system
In standby precast reinforced stay in place form, maintenance is stood, the busting reinforcement concrete with Negative poisson's ratio is obtained.
7. the preparation method of the busting reinforcement concrete according to claim 6 with Negative poisson's ratio, feature exist
In: the priming paint is epoxy resin primer, poly phenol oxygen priming paint, alkyd amino base coat, zinc yellow polyurethane primer, iron red alcohol acid
One or more of resin primer, acrylic primer, polyureas priming paint.
8. the preparation method of the busting reinforcement concrete according to claim 6 with Negative poisson's ratio, feature exist
In: the reinforcing bar is the high rib reinforcements such as hot rolling plain bar, hot-rolled strip Rib Reinforced reinforcement, hot-rolled strip, waste heat treatment steel bar, steel strand
One or more of line, cold rolled reinforcing steel bar with ribs, cold drawn bar, cold drawn wire, cold-rolled torsion steel bar；Model 6,8,10,12,
14,16,18,20,22,24,28, one or more of 32mm.
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| CN109854659B (en) * | 2019-03-08 | 2021-03-30 | 哈尔滨工程大学 | Buffering and vibration suppression structure with concave and chiral negative Poisson ratio effects |
| CN110041019A (en) * | 2019-05-10 | 2019-07-23 | 南京工业大学 | A kind of preparation method of the concrete material of chimeric negative poisson's ratio foam |
| CN211622277U (en) * | 2019-09-27 | 2020-10-02 | 何满潮 | NPR spiral reinforcing steel bar |
| CN111003959B (en) * | 2019-10-25 | 2020-11-24 | 青岛理工大学 | Anti-knock and anti-impact multi-stage heterogeneous fiber prefabricated body composite concrete and preparation method thereof |
| CN113153073B (en) * | 2021-04-19 | 2022-12-06 | 福建厚德节能科技发展有限公司 | Evaporate and press waterproof windowsill of aerated concrete |
| CN113816676B (en) * | 2021-09-06 | 2022-05-31 | 青岛理工大学 | Negative Poisson's ratio cement-based composite material and preparation method thereof |
| US11873637B2 (en) | 2022-02-15 | 2024-01-16 | Joon Bu Park | Bricks exhibiting negative Poisson's ratio |
| CN114703904B (en) * | 2022-03-12 | 2023-12-22 | 北京工业大学 | Concave hexagonal section earthquake metaplasia structure based on lamb wave |
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