CN220486908U - I-shaped ultra-high performance concrete beam reinforced by mixing embedded steel plates and BFRP - Google Patents
I-shaped ultra-high performance concrete beam reinforced by mixing embedded steel plates and BFRP Download PDFInfo
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- CN220486908U CN220486908U CN202321405619.1U CN202321405619U CN220486908U CN 220486908 U CN220486908 U CN 220486908U CN 202321405619 U CN202321405619 U CN 202321405619U CN 220486908 U CN220486908 U CN 220486908U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 49
- 101710107464 Probable pyruvate, phosphate dikinase regulatory protein, chloroplastic Proteins 0.000 title claims abstract description 29
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 230000001070 adhesive effect Effects 0.000 claims abstract description 7
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000004567 concrete Substances 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to an I-shaped ultra-high performance concrete beam reinforced by mixing an embedded steel plate and BFRP, which comprises an ultra-high performance concrete I-shaped beam body, wherein a BFRP outer adhesive layer is sleeved outside the ultra-high performance concrete I-shaped beam body, an adhesive is arranged between the ultra-high performance concrete I-shaped beam body and the BFRP outer adhesive layer, an I-shaped hollowed steel plate is arranged inside the ultra-high performance concrete I-shaped beam body, and the length of the I-shaped hollowed steel plate is larger than that of the ultra-high performance concrete I-shaped beam body. The steel-saving H-shaped steel beam has better heat preservation performance, fire resistance and corrosion resistance, can save steel, and can be used as a replacement component of a common H-shaped steel beam in a severe environment; compared with the traditional concrete beam, the utility model has small section, greatly reduces the weight of the component, has better bearing capacity, lateral rigidity and durability, and increases the space utilization rate.
Description
Technical Field
The utility model relates to the technical field of civil engineering, in particular to an I-shaped ultra-high performance concrete beam reinforced by mixing an embedded steel plate and BFRP.
Background
The steel structure has the advantages of high strength, light dead weight, good toughness, high industrialization degree and short construction period, and more construction structures adopting the steel structure form are adopted in some super high-rise buildings, industrial factory buildings, large-span buildings, overhead overpasses and cultural stadiums. However, common steel structures are easily corroded in severe service environments (especially coastal environments), and the safety and the resistance of the steel structures are seriously reduced. In general, the steel structure can be maintained by rust removal, paint spraying or fatigue strengthening methods, but these methods are costly to maintain for a long period of time.
In recent years, ultra-high performance concrete (UHPC) has been widely used in various types of engineering by virtue of its outstanding characteristics of ultra-high strength, high toughness, high durability, etc., and is considered to be one of the most promising high performance cement-based materials at present. Fiber reinforced composites (FRPs) are composites formed from fibers processed by different molding processes and have good corrosion resistance and durability. Therefore, aiming at the characteristic that the steel structure is easy to corrode, UHPC and FRP are applied to the field of the steel structure, and the formation of a novel composite member with good mechanical properties and durability is one of the important development directions in the future in the current civil engineering field. However, there are still few composite applications of UHPC, FRP and steel structures.
Disclosure of Invention
The utility model aims to solve the defects of the prior art and provides an I-shaped ultra-high performance concrete beam reinforced by mixing an embedded steel plate and BFRP.
The utility model adopts the following technical scheme to realize the aim: the I-shaped ultra-high performance concrete beam comprises an ultra-high performance concrete beam body, wherein a BFRP outer coating layer is sleeved on the outer side of the ultra-high performance concrete beam body, an adhesive is arranged between the ultra-high performance concrete beam body and the BFRP outer coating layer, an I-shaped hollowed steel plate is arranged in the ultra-high performance concrete beam body, and the length of the I-shaped hollowed steel plate is greater than that of the ultra-high performance concrete beam body.
Further, a plurality of round holes are formed in the middle of the I-shaped hollowed steel plate web, and two connecting holes are formed in two ends of the I-shaped hollowed steel plate web.
Further, the adhesive is epoxy resin, and the bonding strength of the epoxy resin is more than 3.5MPa.
Further, the BFRP outer coating is a basalt fiber reinforced matrix composite layer, and the tensile strength is greater than 850MPa.
Furthermore, the surface of the ultra-high performance concrete rectangular beam body is a polished surface.
Further, the compressive strength of the ultra-high performance concrete H-shaped beam body is more than 160MPa, the bending strength is more than 23MPa, the tensile strength is more than 9MPa, the volume fraction of the contained steel fibers is more than or equal to 3%, and the steel fibers are straight copper-plated steel fibers.
Furthermore, the yield strength of the steel of the I-shaped hollowed-out steel plate is 235+/-5 MPa, and the ultimate strength of the steel is 435+/-10 MPa.
The beneficial effects of the utility model are as follows: the steel-saving H-shaped steel beam has better heat preservation performance, fire resistance and corrosion resistance, can save steel, and can be used as a replacement component of a common H-shaped steel beam in a severe environment; compared with the traditional concrete beam, the utility model has small section, greatly reduces the weight of the component, has better bearing capacity, lateral rigidity and durability, and increases the space utilization rate.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the present utility model in a separated configuration;
FIG. 3 is a cross-sectional view of the present utility model;
in the figure: 1-an ultra-high performance concrete I-shaped beam body; 2-BFRP external layer; 3-I-shaped hollowed-out steel plates; 301-circular holes; 302-connecting holes;
the drawings in the present utility model are schematic, and their sizes do not represent actual dimensions;
the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 3, the i-shaped ultra-high performance concrete beam reinforced by the mixed embedded steel plate and the BFRP comprises an ultra-high performance concrete beam body 1, the outer side of the ultra-high performance concrete beam body 1 is sleeved with a BFRP outer attaching layer 2, the BFRP outer attaching layer 2 can effectively prevent invasion of harmful substances, durability and safety of the beam body are greatly enhanced, an adhesive is arranged between the ultra-high performance concrete beam body 1 and the BFRP outer attaching layer 2, the adhesive is epoxy resin, and bonding strength of the epoxy resin is more than 3.5MPa. The inner part of the ultra-high-performance concrete I-shaped beam body 1 is provided with an I-shaped hollowed steel plate 3, and the length of the I-shaped hollowed steel plate 3 is greater than that of the ultra-high-performance concrete I-shaped beam body 1. The middle part of the web plate of the I-shaped hollowed steel plate 3 is provided with a plurality of circular holes 301, the web plate is hollowed out at intervals, the effect of saving steel is achieved, two connecting holes 302 are formed in two ends of the web plate of the I-shaped hollowed steel plate 3, and the two connecting holes are connected with the structure in a bolt or welding mode, so that the installation and replacement of components are facilitated, the assembly type steel plate can be used for large-scale production of assembly type components, and the on-site construction precision control is facilitated. The tensile strength of the BFRP outer coating layer 2 is greater than 850MPa. The surface of the ultra-high performance concrete I-shaped beam body 1 is a polished surface. The compressive strength of the ultra-high performance concrete I-shaped beam body 1 is more than 160MPa, the bending strength is more than 23MPa, the tensile strength is more than 9MPa, the volume fraction of the contained steel fibers is more than or equal to 3%, and the steel fibers are straight copper-plated steel fibers. The yield strength of the steel of the I-shaped hollowed-out steel plate 3 is 235+/-5 MPa, and the ultimate strength of the steel is 435+/-10 MPa.
In the embodiment, the ultra-high-performance concrete H-shaped beam body 1 is made of ultra-high-performance concrete, the compressive strength is 163MPa, the bending strength is 24.9MPa, the tensile strength is 9.6MPa, the length of steel fibers is 12mm, and the diameter is 0.13mm. The BFRP outer adhesive layer 2 is made of basalt fiber reinforced matrix composite material, and is provided with two layers, and the tensile strength of the BFRP outer adhesive layer is 897MPa. The I-shaped hollowed-out steel plate 3 is made of Q235 steel, the yield strength of the steel is 235.3MPa, and the ultimate strength of the steel is 439MPa. When the ultra-high-performance concrete font beam body 1 and the BFRP external attaching layer 2 are bonded, the surface of the ultra-high-performance concrete font beam body 1 needs to be polished so as to increase the bonding performance between the ultra-high-performance concrete font beam body 1 and the BFRP external attaching layer 2, and the bonding strength of epoxy resin is 3.6MPa.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the utility model, or applied directly to other applications without modification, within the scope of the utility model.
Claims (7)
1. The embedded steel plate and BFRP mixed reinforced I-shaped ultra-high performance concrete beam is characterized by comprising an ultra-high performance concrete I-shaped beam body (1), a BFRP outer attaching layer (2) is sleeved outside the ultra-high performance concrete I-shaped beam body (1), an adhesive is arranged between the ultra-high performance concrete I-shaped beam body (1) and the BFRP outer attaching layer (2), an I-shaped hollowed steel plate (3) is arranged in the ultra-high performance concrete I-shaped beam body (1), and the length of the I-shaped hollowed steel plate (3) is larger than that of the ultra-high performance concrete I-shaped beam body (1).
2. The embedded steel plate and BFRP mixed reinforced I-shaped ultra-high performance concrete beam according to claim 1, wherein a plurality of round holes (301) are formed in the middle of a web plate of the I-shaped hollowed steel plate (3), and two connecting holes (302) are formed in two ends of the web plate of the I-shaped hollowed steel plate (3).
3. The embedded steel plate and BFRP mixed reinforced I-shaped ultra-high performance concrete beam of claim 2, wherein the adhesive is epoxy resin, and the bonding strength of the epoxy resin is more than 3.5MPa.
4. The embedded steel plate and BFRP mixed reinforced I-shaped ultra-high performance concrete beam according to claim 3, wherein the BFRP outer attaching layer (2) is a basalt fiber reinforced base composite material layer, and the tensile strength is more than 850MPa.
5. The i-shaped ultra-high performance concrete beam reinforced by mixing the embedded steel plate and the BFRP according to claim 4, wherein the surface of the ultra-high performance concrete i-shaped beam body (1) is a polished surface.
6. The i-shaped ultra-high performance concrete beam reinforced by mixing the embedded steel plates and the BFRP according to claim 5, wherein the compressive strength of the ultra-high performance concrete i-shaped beam body (1) is more than 160MPa, the bending strength is more than 23MPa, and the tensile strength is more than 9MPa.
7. The embedded steel plate and BFRP mixed reinforced I-shaped ultra-high performance concrete beam as claimed in claim 6, wherein the yield strength of the steel material of the I-shaped hollowed steel plate (3) is 235+/-5 MPa, and the ultimate strength of the steel material is 435+/-10 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321405619.1U CN220486908U (en) | 2023-06-05 | 2023-06-05 | I-shaped ultra-high performance concrete beam reinforced by mixing embedded steel plates and BFRP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321405619.1U CN220486908U (en) | 2023-06-05 | 2023-06-05 | I-shaped ultra-high performance concrete beam reinforced by mixing embedded steel plates and BFRP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220486908U true CN220486908U (en) | 2024-02-13 |
Family
ID=89832301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321405619.1U Active CN220486908U (en) | 2023-06-05 | 2023-06-05 | I-shaped ultra-high performance concrete beam reinforced by mixing embedded steel plates and BFRP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220486908U (en) |
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2023
- 2023-06-05 CN CN202321405619.1U patent/CN220486908U/en active Active
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