Integral abutment device suitable for cold-bending curled U-shaped steel composite beam

Abstract

The utility model relates to an integral abutment device suitable for a cold-bending curled U-shaped steel composite beam. At present, separated bridge abutments and semi-integral bridge abutments are complex in structure and tedious in construction, bridge heads are prone to damage, and durability is poor. The U-shaped cross-section cold-bending edge-curling concrete bridge comprises a cold-bending edge-curling U-shaped cross-section steel beam, a concrete bridge deck slab and an integral bridge abutment, the upper flange of the cold-bending curled-edge U-shaped-section steel beam is fixedly connected with the concrete bridge deck, the two ends of the cold-bending curled-edge U-shaped-section steel beam are embedded into the integral bridge abutment, and longitudinal load-bearing steel bars are arranged in the concrete bridge deck. Holes are formed in the two webs, close to the side of the integral bridge abutment, of the cold-bending curled-edge U-shaped-section steel beam respectively, and transverse penetrating steel bars are arranged in the holes. According to the utility model, the construction speed and the industrialization degree are improved, the bending and shearing resistance of the small and medium span beam bridge is enhanced, and the stability and durability of the beam body are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to an integral abutment device suitable for cold-bent curled-edge U-shaped steel composite beams. Background Art

[0002] Steel-concrete composite bridges are bridge structures composed of steel structures and concrete through shear connectors. They can give full play to the respective advantages of steel and concrete, and have become a highly competitive bridge type in small and medium span bridges. As one of the steel-concrete composite bridges, the cold-formed U-shaped steel-concrete composite beam competes with the hollow slab beam bridge. Compared with the hollow slab beam bridge, the cold-formed U-shaped steel-concrete composite beam bridge has a greatly reduced amount of concrete, high material utilization rate, and good economy. On the basis of the advantages of the steel-concrete composite bridge, it can give full play to the advantages of cold-formed steel in terms of light weight, high strength, easy manufacturing, fast construction speed, and high degree of industrialization. Therefore, the cold-formed U-shaped steel-concrete composite beam has a wide range of application prospects in small and medium span bridge structures.

[0003] At present, the cold-formed U-shaped steel-concrete composite beam can be applied to separate abutments, semi-integral abutments and integral abutments. The separate abutments have clear forces, but their structures are complex and construction is inconvenient; the semi-integral abutments seamless bridge solves many problems such as the expansion joints of bridges are easily damaged and the maintenance cost is high, but their superstructure still needs to be connected to the abutments by bearings or other means. The abutments are complex in structure and cumbersome in construction, the bridgeheads are prone to diseases, and the durability is poor.

[0004] In summary, a new type of cold-formed rolled-edge U-shaped steel composite beam abutment structure is urgently needed. Summary of the invention

[0005] The purpose of the utility model is to provide an integral abutment device suitable for cold-bent curled U-shaped steel composite beams, so as to at least solve the problems of complex structure, cumbersome construction, many fatigue diseases and poor durability of traditional separated abutments and semi-integral abutments.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An integral abutment device suitable for a cold-bent U-shaped steel composite beam, comprising a cold-bent U-shaped steel beam, a concrete bridge deck and an integral abutment;

[0008] The upper flange of the cold-bent U-shaped cross-section steel beam is fixedly connected to the concrete bridge deck, and both ends of the cold-bent U-shaped cross-section steel beam are respectively embedded in the integral abutment, and longitudinal stress-bearing steel bars are arranged inside the concrete bridge deck;

[0009] The two webs of the cold-bent U-shaped cross-section steel beam close to the integral abutment side are respectively provided with holes, and transverse penetrating steel bars are arranged in the holes.

[0010] Furthermore, the cold-bent, curled-edge U-section steel beams are provided in plurality and arranged side by side.

[0011] Furthermore, there is a spacing between the upper flanges of adjacent cold-bent, curled-edge U-section steel beams.

[0012] Furthermore, a plurality of the cold-bent, curled-edge U-section steel beams are connected through the transverse through-steel bars.

[0013] Furthermore, the upper flange of the cold-bent U-shaped steel beam is fixedly connected to the concrete bridge deck by bolts.

[0014] Furthermore, partitions are provided at the ends of the webs on both sides of the cold-bent, curled-edge U-section steel beam.

[0015] Furthermore, the partition is consistent in size with the inner part of the cold-bent curled U-section steel beam.

[0016] Furthermore, a plurality of the bolts are provided on the lower flange of the end of the cold-bent, curled U-section steel beam.

[0017] Furthermore, at least three holes are provided on each web of the cold-bent, curled-edge U-section steel beam.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] 1. The utility model reduces the amount of concrete and carbon emissions of the upper structure, realizes lightweight of the upper structure, reduces the amount of lower structure, reduces construction and installation costs and requirements for lifting equipment, improves construction speed and industrialization, enhances the bending and shear performance of small and medium span beam bridges, and improves the stability and durability of the beam body; at the same time, compared with the traditional composite beam abutment structure, the connection method and connection process between the composite beam end and the abutment are optimized.

[0020] 2. At the component level, the utility model realizes the seamless connection between the cold-bent rolled U-section steel beam and the abutment, which is an integral abutment seamless bridge with good structural integrity, excellent seismic performance, reduced maintenance costs, and improved bridge head jumping phenomenon. At the force level, the integral abutment can play the role of an end beam, simplifying the bridge end structure and improving the stability of the bridge structure under eccentric load. In addition, due to the presence of a negative bending moment zone at the end of this bridge structure, the maximum bending moment of the mid-span section under live load is reduced, and the structural force is more reasonable, which is conducive to the bearing of cold-bent steel plates. At the construction level, the end of the cold-bent rolled U-section steel beam is integrally cast with the abutment. The cold-bent rolled U-section steel beam is fast to manufacture and can be prefabricated in the factory. It is easy to assemble and construct, with a fast construction speed, a high degree of standardization and industrialization, a small amount of work on the construction site, and a high degree of quality controllability, which reduces the construction period and construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment;

[0023] Figure 2 yes Figure 1 Schematic diagram of the structure of the longitudinal stress-bearing steel bars;

[0024] Figure 3 yes Figure 1 Schematic diagram of the connection between the cold-bent U-section steel beam and the concrete bridge deck;

[0025] Figure 4 It is a schematic diagram of the internal structure of a cold-formed, curled-edge U-section steel beam;

[0026] The symbols in the figure are:

[0027] 1-cold-formed U-section steel beam, 2-concrete bridge deck, 3-integral abutment, 4-longitudinal stress-bearing steel bars, 5-studs, 6-partitions, 7-holes, 8-transverse through-steel bars. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0029] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] like Figure 1-Figure 4 As shown, this embodiment provides an integral abutment device suitable for cold-bent rolled U-shaped steel composite beams, the device has good integrity, fast construction speed, and high degree of industrialization; it can enhance the bearing capacity of small and medium span bridges, improve the stability and durability of bridge structures, optimize the connection method and connection process between the ends of composite beams and abutments, and can be directly used as end cross diaphragms and applied to fixed end beams. The device includes a cold-bent rolled U-shaped section steel beam 1, a concrete bridge deck 2 and an integral abutment 3.

[0033] Furthermore, the upper flange of the cold-bent U-section steel beam 1 is fixedly connected to the concrete bridge deck 2 by a plurality of bolts 5 to form a steel-concrete composite beam, and both ends of the cold-bent U-section steel beam 1 are respectively embedded in the integral abutment 3, and a plurality of longitudinal stress-bearing steel bars 4 are provided inside the concrete bridge deck 2.

[0034] There are a plurality of cold-bent U-shaped cross-section steel beams 1 , which are arranged side by side, and there is a spacing between the upper flanges of adjacent cold-bent U-shaped cross-section steel beams 1 .

[0035] A plurality of studs 5 are welded to the lower flange of the end of the cold-bent U-shaped cross-section steel beam 1 , and the bottom plate of the end of the cold-bent U-shaped cross-section steel beam 1 is connected to the concrete through the studs 5 to form a whole.

[0036] Holes 7 are respectively provided on the two webs of the cold-bent U-shaped cross-section steel beam 1 close to the integral abutment 3 , and transverse through-steel bars 8 are provided in the holes 7 .

[0037] A plurality of cold-formed, curled-edge U-section steel beams 1 are connected through transverse through-steel bars 8 .

[0038] In this embodiment, at least three holes 7 are formed on each web of the cold-bent U-shaped steel beam 1 .

[0039] Furthermore, partitions 6 are provided at the ends of the webs on both sides of the cold-bent U-shaped cross-section steel beam 1 to prevent concrete from flowing into the cavity of the cold-bent U-shaped cross-section steel beam 1 when the integral abutment 3 is cast.

[0040] The partition plate 6 is consistent in size with the interior of the cold-bent U-shaped cross-section steel beam 1 , and is arranged to fit the interior of the cold-bent U-shaped cross-section steel beam 1 .

[0041] The installation process of this embodiment is as follows:

[0042] A prefabricated steel plate is processed in the steel structure, a hole 7 is opened at a preset position, and the steel plate after the hole is opened is made into a cold-bent curled U-section steel beam 1 through a cold-bent process.

[0043] A partition plate 6 is arranged at the end of the web of the cold-bent U-shaped cross-section steel beam 1, and a bolt 5 is arranged at the bottom plate of the end of the cold-bent U-shaped cross-section steel beam 1 for connection with concrete.

[0044] The prefabricated cold-bent U-section steel beam 1 is transported to the bridge site and overlapped with the integral abutment 3. A formwork is arranged on the cold-bent U-section steel beam 1, longitudinal stress-bearing steel bars 4 are arranged in the concrete bridge deck 2, concrete is poured, and transverse through steel bars 8 are placed in the holes 7.

[0045] Pour the abutment concrete and maintain it in a curing process.

[0046] Embodiment 2:

[0047] In this embodiment, the lower flange of the end of the cold-bent U-shaped cross-section steel beam 1 is connected to the concrete through a PBL opening. The PBL is a hole opened in the bottom plate of the end of the cold-bent U-shaped cross-section steel beam 1, and steel bars are placed in the hole and cast with concrete into a whole. The construction is fast, the seismic performance is excellent, the stability and durability are good, and the integrity of the device is better.

[0048] The rest of the working process and principles are consistent with those of Example 1.

[0049] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An integral abutment device suitable for cold-formed U-shaped steel composite beams, characterized in that: The device comprises a cold-bent, curled-edge U-section steel beam (1), a concrete bridge deck (2) and an integral bridge abutment (3); The upper flange of the cold-bent U-shaped cross-section steel beam (1) is fixedly connected to the concrete bridge deck (2), and both ends of the cold-bent U-shaped cross-section steel beam (1) are respectively embedded in the integral abutment (3), and longitudinal stress-bearing steel bars (4) are provided inside the concrete bridge deck (2); Holes (7) are respectively provided on the two webs of the cold-bent, curled-edge U-section steel beam (1) close to the integral abutment (3), and transversely penetrating steel bars (8) are provided in the holes (7).

2. The integral abutment device suitable for cold-bent U-shaped steel composite beam according to claim 1, characterized in that: A plurality of cold-bent rolled U-section steel beams (1) are provided and arranged side by side.

3. The integral abutment device suitable for cold-bent U-shaped steel composite beams according to claim 1, characterized in that: There is a spacing between the upper flanges of adjacent cold-bent, curled-edge U-section steel beams (1).

4. The integral abutment device suitable for cold-formed U-shaped steel composite beams according to claim 1, characterized in that: A plurality of the cold-bent, curled-edge U-section steel beams (1) are connected through the transverse through-steel bars (8).

5. The integral abutment device suitable for cold-bent U-shaped steel composite beam according to claim 1, characterized in that: The upper flange of the cold-bent, curled-edge U-section steel beam (1) is fixedly connected to the concrete bridge deck (2) via bolts (5).

6. The integral abutment device suitable for cold-formed U-shaped steel composite beams according to claim 1, characterized in that: The web ends on both sides of the cold-bent, curled-edge U-section steel beam (1) are provided with partitions (6).

7. The integral abutment device suitable for cold-formed U-shaped steel composite beams according to claim 6, characterized in that: The partition plate (6) is consistent in size with the inner portion of the cold-bent, curled-edge U-section steel beam (1).

8. The integral abutment device suitable for cold-bent U-shaped steel composite beam according to claim 5, characterized in that: A plurality of bolts (5) are provided on the lower flange of the end of the cold-bent, curled-edge U-section steel beam (1).

9. The integral abutment device suitable for cold-formed U-shaped steel composite beams according to claim 1, characterized in that: At least three holes (7) are provided on each web of the cold-bent, curled-edge U-section steel beam (1).

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