CN111706003A - Round steel tube concrete with negative Poisson's ratio effect and design method thereof - Google Patents
Round steel tube concrete with negative Poisson's ratio effect and design method thereof Download PDFInfo
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- CN111706003A CN111706003A CN202010716527.XA CN202010716527A CN111706003A CN 111706003 A CN111706003 A CN 111706003A CN 202010716527 A CN202010716527 A CN 202010716527A CN 111706003 A CN111706003 A CN 111706003A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 161
- 239000010959 steel Substances 0.000 title claims abstract description 161
- 230000000694 effects Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000000737 periodic effect Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 6
- 238000010146 3D printing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0023—Lining the inner wall of hollow objects, e.g. pipes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
Abstract
The invention discloses a round steel tube concrete with a negative Poisson ratio effect and a design method thereof, wherein the round steel tube concrete comprises a round steel tube with the negative Poisson ratio effect, a steel support with the negative Poisson ratio effect and concrete; the steel support is arranged on the inner wall of the circular steel tube, and the concrete is filled in the circular steel tube; the round steel pipe and the steel support are of a hole structure with periodic horizontal and vertical alternation; the relation between the height L of the circular steel tube and the diameter D of the circular steel tube is as follows: 2.5< L/D < 5; the relation between the thickness r of the round steel pipe and the diameter D of the round steel pipe is required to be more than 30 and less than 40; the height of the steel support is equal to L, and the width d of the steel support meets the following requirements: 0.6< D/D < 0.7. The circular steel tube concrete can actively restrain the transverse deformation of the core concrete, and improves the bearing capacity and the ductility of the structure under pressure. Meanwhile, the hole design of the negative Poisson ratio steel pipe can improve the anti-seismic performance of the structure.
Description
Technical Field
The invention relates to a round steel tube concrete with a negative Poisson ratio effect, which is designed by designing a three-dimensional negative Poisson ratio hole structure, relates to a combined structure of steel and concrete, and provides a design method of the negative Poisson ratio round steel tube concrete, belonging to the field of new materials and new structures.
Background
Concrete has a long history as the most common material in construction. Due to the existence of initial defects, when the concrete is axially compressed, the concrete begins to expand transversely, so that cracks are continuously developed until the cracks are communicated to form a damaged surface. Although the steel pipe concrete can restrain the radial expansion of the concrete when the Poisson ratio of the concrete is larger than that of the steel pipe, when the concrete starts to be pressed, the Poisson ratio of the concrete is smaller than that of the steel pipe, the radial deformation of the steel pipe is larger than that of the concrete, and the steel pipe does not play a role in restraining the concrete.
The negative poisson's ratio material and the structure have unusual mechanical properties, and different from the compression expansion and the stretching of the traditional material, the negative poisson's ratio material transversely contracts (expands) under the action of uniaxial pressure (tensile force). The negative poisson's ratio effect can improve the mechanical properties of the material, including shear modulus, fracture toughness, energy absorption characteristics, strength, indentation resistance and the like. Due to the excellent performances, the negative Poisson's ratio material has wider and wider application prospect in the fields of medical equipment, sensors, protective equipment, aviation and navigation, national defense engineering and the like.
According to the invention, the round steel pipe with the negative Poisson's ratio is combined with the concrete structure, and the characteristic that the round pipe with the negative Poisson's ratio shrinks inwards under axial pressure is utilized, so that the condition that the existing concrete-filled steel pipe is insufficient in confined concrete is improved, and the bearing capacity, ductility and earthquake resistance of the structure are improved. The invention combines a negative Poisson ratio structure and a steel-concrete structure, and designs and manufactures the round steel tube concrete with the negative Poisson ratio effect.
Disclosure of Invention
The invention aims to design and manufacture practical negative poisson ratio round steel pipe concrete by utilizing the special properties of negative poisson ratio materials and structures aiming at the defects of the existing steel pipe concrete, and provides a specific design method, the designed round steel pipe concrete can actively restrain the transverse deformation of core concrete, and the stress bearing capacity and the ductility of the structure are improved. Meanwhile, the hole design of the negative Poisson ratio steel pipe can improve the anti-seismic performance of the structure.
The technical scheme adopted by the invention is as follows: a round steel tube concrete with a negative Poisson ratio effect comprises a round steel tube with the negative Poisson ratio effect, a steel support with the negative Poisson ratio effect and concrete; the steel support is arranged on the inner wall of the circular steel tube, and the concrete is filled in the circular steel tube;
the round steel pipe and the steel support are of a hole structure with periodic horizontal and vertical alternation;
the relation between the height L of the circular steel tube and the diameter D of the circular steel tube is as follows: 2.5< L/D < 5;
the relation between the thickness r of the round steel pipe and the diameter D of the round steel pipe is required to be more than 30 and less than 40;
the number of the steel supports is four, the steel supports are arranged along the inner wall of the circular steel tube at intervals of 90 degrees and are not contacted with the holes of the hole structure of the circular steel tube;
the height of the steel support is equal to L, and the width d of the steel support meets the following requirements: 0.6< D/D < 0.7;
and HY-T119 rhinestone glue is filled in the holes of the hole structures of the round steel pipe and the steel support.
Preferably, the hole shape of the hole structure of the round steel pipe and the steel support comprises an ellipse, a triangle and a polygon.
The method for designing the round steel tube concrete with the negative Poisson's ratio effect comprises the following steps:
1) determining the sizes of the round steel pipe, the steel support and the concrete according to the stress condition and the building application of the round steel pipe concrete with the negative Poisson ratio;
2) the round steel pipe and the steel support with the negative Poisson's ratio are designed to be of a periodic hole structure with alternate horizontal and vertical directions, and the space between holes in the hole structure is reduced as much as possible under the condition of meeting the stress requirement;
3) selecting high-strength steel as a base material of the circular steel tube and the steel support, and preparing the circular steel tube and the steel support with the negative Poisson ratio effect by adopting a 3D printing technology;
4) the holes of the hole structures of the round steel pipe and the steel support are filled with HY-T119 rhinestone glue to prevent concrete from being filled in the pouring process;
5) and pouring concrete into the combined round steel tube and steel support, and curing to obtain the round steel tube concrete with the negative Poisson's ratio effect.
The key of the negative Poisson ratio effect generated by the invention lies in the design of the negative Poisson ratio round steel pipe and the steel support. The transverse and vertical alternate hole-shaped structures are ensured to be smaller, so that the steel pipe and the steel support have a negative Poisson ratio effect. The round steel tube concrete designed by the method has obvious negative Poisson ratio effect, and can maintain the negative Poisson ratio performance in a large strain range.
Has the advantages that: the round steel tube concrete designed by the method has a larger negative Poisson ratio effect when being axially compressed. Compared with traditional steel pipe concrete, the transverse deformation of the core concrete can be better restrained, the bearing capacity of the structure is improved, and the ductility of the structure is increased. Meanwhile, by utilizing the good energy absorption characteristic of the negative Poisson's ratio round steel tube, the shock resistance of the round steel tube concrete is also improved.
Drawings
FIG. 1 is a front view of a round steel tube concrete with negative Poisson's ratio effect according to the present invention;
FIG. 2 is a top view of a round steel tube concrete with negative Poisson's ratio effect according to the present invention;
fig. 3 is a front view of the steel support of the present invention.
Detailed Description
The invention will be further described with reference to the following detailed description and the accompanying drawings:
as shown in fig. 1, 2 and 3, a round steel tube concrete with negative poisson's ratio effect comprises a round steel tube 1 with negative poisson's ratio effect, a steel support 2 with negative poisson's ratio effect and concrete 3; the steel support 2 is arranged on the inner wall of the circular steel tube 1, and the concrete 3 is filled in the circular steel tube 1;
the round steel pipe 1 and the steel support 2 are of a periodic vertical and horizontal alternate hole structure;
the relation between the height L of the circular steel tube 1 and the diameter D of the circular steel tube 1 is as follows: 2.5< L/D < 5;
the relation between the thickness r of the round steel pipe 1 and the diameter D of the round steel pipe 1 is required to be more than 30 and less than D/r and less than 40;
the number of the steel supports 2 is four, the steel supports are arranged at intervals of 90 degrees along the inner wall of the circular steel tube 1 and are not in contact with the holes of the hole structure of the circular steel tube 1;
the height of the steel support 2 is equal to L, and the width d of the steel support 2 satisfies the following conditions: 0.6< D/D < 0.7;
and HY-T119 rhinestone glue is filled in the holes of the hole structures of the round steel pipe 1 and the steel support 2.
The hole shapes of the hole structures of the round steel pipe 1 and the steel support 2 comprise an ellipse, a triangle and a polygon.
The method for designing the round steel tube concrete with the negative Poisson's ratio effect comprises the following steps:
1) determining the sizes of the round steel pipe, the steel support and the concrete according to the stress condition and the building application of the round steel pipe concrete with the negative Poisson ratio;
2) the round steel pipe and the steel support with the negative Poisson's ratio are designed to be of a periodic hole structure with alternate horizontal and vertical directions, and the space between holes in the hole structure is reduced as much as possible under the condition of meeting the stress requirement;
3) selecting high-strength steel as a base material of the circular steel tube and the steel support, and preparing the circular steel tube and the steel support with the negative Poisson ratio effect by adopting a 3D printing technology;
4) the holes of the hole structures of the round steel pipe and the steel support are filled with HY-T119 rhinestone glue to prevent concrete from being filled in the pouring process;
5) and pouring concrete into the combined round steel tube and steel support, and curing to obtain the round steel tube concrete with the negative Poisson's ratio effect.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention. Components not explicitly described in this example can be implemented using existing techniques.
Claims (3)
1. A round steel tube concrete with negative Poisson's ratio effect which characterized in that: the device comprises a round steel pipe with a negative Poisson ratio effect, a steel support with the negative Poisson ratio effect and concrete; the steel support is arranged on the inner wall of the circular steel tube, and the concrete is filled in the circular steel tube;
the round steel pipe and the steel support are of a hole structure with periodic horizontal and vertical alternation;
the relation between the height L of the circular steel tube and the diameter D of the circular steel tube is as follows: 2.5< L/D < 5;
the relation between the thickness r of the round steel pipe and the diameter D of the round steel pipe is required to be more than 30 and less than 40;
the number of the steel supports is four, the steel supports are arranged along the inner wall of the circular steel tube at intervals of 90 degrees and are not contacted with the holes of the hole structure of the circular steel tube;
the height of the steel support is equal to L, and the width d of the steel support meets the following requirements: 0.6< D/D < 0.7;
and HY-T119 rhinestone glue is filled in the holes of the hole structures of the round steel pipe and the steel support.
2. A round steel tube concrete with negative poisson's ratio effect according to claim 1, characterised in that: the hole shape of the hole structure of the round steel pipe and the steel support comprises an ellipse, a triangle and a polygon.
3. A method of designing a concrete filled round steel tube with negative poisson's ratio as claimed in claim 1 or 2, wherein: the method comprises the following steps:
1) determining the sizes of the round steel pipe, the steel support and the concrete according to the stress condition and the building application of the round steel pipe concrete with the negative Poisson ratio;
2) the round steel pipe and the steel support with the negative Poisson's ratio are designed to be of a periodic hole structure with alternate horizontal and vertical directions, and the space between holes in the hole structure is reduced as much as possible under the condition of meeting the stress requirement;
3) selecting high-strength steel as a base material of the circular steel tube and the steel support, and preparing the circular steel tube and the steel support with the negative Poisson ratio effect by adopting a 3D printing technology;
4) the holes of the hole structures of the round steel pipe and the steel support are filled with HY-T119 rhinestone glue to prevent concrete from being filled in the pouring process;
5) and pouring concrete into the combined round steel tube and steel support, and curing to obtain the round steel tube concrete with the negative Poisson's ratio effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716527.XA CN111706003A (en) | 2020-07-23 | 2020-07-23 | Round steel tube concrete with negative Poisson's ratio effect and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716527.XA CN111706003A (en) | 2020-07-23 | 2020-07-23 | Round steel tube concrete with negative Poisson's ratio effect and design method thereof |
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| CN111706003A true CN111706003A (en) | 2020-09-25 |
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| CN202010716527.XA Pending CN111706003A (en) | 2020-07-23 | 2020-07-23 | Round steel tube concrete with negative Poisson's ratio effect and design method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709373A (en) * | 2020-12-29 | 2021-04-27 | 青岛建设集团有限公司 | Assembled shape memory alloy energy-consumption combined column and installation method |
| CN113153073A (en) * | 2021-04-19 | 2021-07-23 | 福建厚德节能科技发展有限公司 | Evaporate and press waterproof windowsill of aerated concrete |
| CN114474785A (en) * | 2022-02-09 | 2022-05-13 | 烟台大学 | 3D multi-component composite auxetic super-structural material based on additive manufacturing |
| US11873637B2 (en) | 2022-02-15 | 2024-01-16 | Joon Bu Park | Bricks exhibiting negative Poisson's ratio |
-
2020
- 2020-07-23 CN CN202010716527.XA patent/CN111706003A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709373A (en) * | 2020-12-29 | 2021-04-27 | 青岛建设集团有限公司 | Assembled shape memory alloy energy-consumption combined column and installation method |
| CN113153073A (en) * | 2021-04-19 | 2021-07-23 | 福建厚德节能科技发展有限公司 | Evaporate and press waterproof windowsill of aerated concrete |
| CN114474785A (en) * | 2022-02-09 | 2022-05-13 | 烟台大学 | 3D multi-component composite auxetic super-structural material based on additive manufacturing |
| CN114474785B (en) * | 2022-02-09 | 2023-11-21 | 烟台大学 | 3D multi-component composite auxetic super-structure material based on additive manufacturing |
| US11873637B2 (en) | 2022-02-15 | 2024-01-16 | Joon Bu Park | Bricks exhibiting negative Poisson's ratio |
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