Composite beam, beam assembly and bridge

Abstract

The utility model relates to the technical field of bridge engineering, and discloses a composite beam, a beam assembly and a bridge. The steel beam is I-shaped steel and extends in the longitudinal direction; the concrete slab is arranged on the top face of the steel beam, and the shear-resistant assembly is located on the top face of the steel beam and embedded into the bottom of the concrete slab. The concrete plate is formed by pouring rubber concrete; the shear-resistant assembly comprises a plurality of shear-resistant connecting pieces, a plurality of longitudinal steel bars and a plurality of transverse steel bars, the longitudinal steel bars are transversely and evenly arranged along the top face of the steel beam, the transverse steel bars are longitudinally and evenly arranged along the top face of the steel beam, and the longitudinal steel bars and the transverse steel bars are arranged on the top face of the steel beam in a crossed mode. The shear connectors are connected to the intersections of the longitudinal steel bars and the transverse steel bars in a one-to-one correspondence mode, and the longitudinal steel bars, the transverse steel bars and the shear connectors are connected. According to the scheme, cracks can be reduced, and the durability of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and more particularly to a combined beam, a beam assembly and a bridge. Background Art

[0002] A composite beam is a transverse load-bearing member that is composed of a steel beam and a concrete slab connected into a whole by shear connectors and bears the load together. It can fully utilize the advantages of steel's tensile strength and concrete's compressive strength. It has the advantages of high bearing capacity, high rigidity, good seismic and dynamic performance, small cross-sectional dimensions, and easy construction. It is a key part in bridge design.

[0003] Existing composite beams utilize steel beams in various shapes, including I-beams, box beams, steel trusses, and honeycomb beams. Concrete slabs are mostly constructed using conventional concrete. Conventional concrete has relatively poor dynamic performance, including insufficient resistance to impact and vibration. It is prone to cracking or localized failure under dynamic loads. Furthermore, conventional concrete exhibits poor durability under cyclic loading and is prone to fatigue damage, which impacts the overall stability and service life of the structure.

[0004] Rubber concrete improves its impact resistance and workability by incorporating waste rubber particles into ordinary concrete. The elasticity of rubber enables rubber concrete to effectively absorb and relieve stress when subjected to impact loads, reducing the occurrence of cracks. Furthermore, rubber concrete offers excellent vibration damping properties. The rubber particles significantly reduce vibration transmission and enhance structural stability under dynamic loads. Furthermore, rubber improves concrete's fatigue resistance, extending the service life of bridges and earthquake-resistant structures. Utility Model Content

[0005] The purpose of this application is to provide a composite beam, aiming to solve the technical problems in the prior art that composite beams are prone to cracks or local damage, have poor overall stability, and have a short service life.

[0006] To achieve the above-mentioned purpose, the present application adopts a composite beam comprising: a steel beam, a shear component and a concrete slab;

[0007] The steel beam is an I-beam, and the steel beam extends in the longitudinal direction;

[0008] The concrete slab is arranged on the top surface of the steel beam, and the shear resistant component is located on the top surface of the steel beam and embedded in the bottom of the concrete slab;

[0009] The concrete slab is cast by using rubber concrete;

[0010] The shear-resistant assembly includes multiple shear connectors, multiple longitudinal steel bars and multiple transverse steel bars. The multiple longitudinal steel bars are evenly arranged along the transverse direction of the top surface of the steel beam, and the multiple transverse steel bars are evenly arranged along the longitudinal direction of the top surface of the steel beam. The longitudinal steel bars and the transverse steel bars are arranged crosswise. The shear connectors are fixedly connected to the top surface of the steel beam, and the multiple shear connectors are connected one-to-one to the intersections of the multiple longitudinal steel bars and the transverse steel bars. The longitudinal steel bars, the transverse steel bars and the shear connectors are fixedly connected.

[0011] As a preferred technical solution, the longitudinal steel bars, the transverse steel bars and the shear connectors are connected by binding.

[0012] As a preferred technical solution, the shear connector is a stud.

[0013] As a preferred technical solution, the studs are welded to the top surface of the steel beam.

[0014] As a preferred technical solution, the longitudinal steel bars and the transverse steel bars are both HRB400 steel bars.

[0015] As a preferred technical solution, the diameter of the longitudinal steel bars is larger than that of the transverse steel bars.

[0016] As a preferred technical solution, the diameter of the longitudinal steel bars is between 16-25 mm, and the diameter of the transverse steel bars is between 12-16 mm.

[0017] In addition, the utility model also provides a beam assembly, including the above-mentioned composite beam, multiple steel beams are arranged in sequence along the transverse and / or longitudinal direction, in two adjacent composite beams in the transverse direction, each transverse steel bar is connected one by one, in two adjacent composite beams in the longitudinal direction, each longitudinal steel bar is connected one by one, and multiple concrete slabs are formed by integral casting.

[0018] Finally, the utility model also provides a bridge, comprising the above beam assembly.

[0019] A composite beam in the present application includes a steel beam, a concrete slab cast and formed by rubber concrete, and a shear assembly consisting of multiple shear connectors, multiple cross-distributed longitudinal steel bars, and multiple transverse steel bars. The concrete slab and the shear assembly are both arranged on the top surface of the steel beam, and the shear assembly is embedded in the bottom of the concrete slab. The shear connector is connected with the cross-transverse and longitudinal steel bars to form a strong composite structure, which effectively resists shear force, increases the overall stiffness and bearing capacity of the structure, and reduces the occurrence of cracks. In addition, the rubber concrete has excellent elasticity, crack resistance and impact resistance, which can effectively alleviate the dynamic load and vibration borne by the composite beam, reduce the formation of cracks, and also improve the durability of the composite beam and extend the service life of the composite beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present application is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.

[0021] Figure 1 is a perspective view of the present utility model;

[0022] Figure 2 It is a partial cross-sectional view of the utility model;

[0023] Figure 3 It is a top view of the utility model;

[0024] Among them: 1. Steel beam; 2. Concrete slab; 3. Shear connector; 4. Transverse reinforcement; 5. Longitudinal reinforcement. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] See Figure 1-3 , a composite beam provided in an embodiment of the present application, comprising: a steel beam 1, a shear component and a concrete slab 2;

[0027] The steel beam 1 is an I-beam, and the steel beam 1 extends in the longitudinal direction;

[0028] The concrete slab 2 is provided on the top surface of the steel beam 1 , and the shear component is located on the top surface of the steel beam 1 and embedded in the bottom of the concrete slab 2 ;

[0029] The concrete slab 2 is cast and formed by rubber concrete;

[0030] The shear-resistant assembly includes multiple shear connectors 3, multiple longitudinal steel bars 5 and multiple transverse steel bars 4. The multiple longitudinal steel bars 5 are evenly arranged horizontally along the top surface of the steel beam 1, and the multiple transverse steel bars 4 are evenly arranged longitudinally along the top surface of the steel beam 1. The longitudinal steel bars 5 and the transverse steel bars 4 are arranged crosswise. The shear connector 3 is fixedly connected to the top surface of the steel beam 1, and the multiple shear connectors 3 are connected one by one to the intersections of the multiple longitudinal steel bars 5 and the transverse steel bars 4. The longitudinal steel bars 5, the transverse steel bars 4 and the shear connector 3 are connected.

[0031] In this embodiment, because the I-beam has a strong design and is resistant to aging, it has good impact resistance and wear resistance, and has a long service life. The length of the I-beam can be adjusted according to actual needs. Therefore, this application prefers the I-beam as the steel beam 1. The transverse reinforcement 4 and the longitudinal reinforcement 5 are cross-arranged on the top surface of the I-beam to provide two-way support for the composite beam, enhance the shear, tensile and bending resistance of the composite beam, effectively improve the bearing capacity and durability of the structure, and reduce the occurrence of cracks. The shear connector 3 is connected to the transverse reinforcement 4 and the longitudinal reinforcement 5 to form a strong composite structure, which increases the overall stiffness and bearing capacity of the bridge deck. In addition, rubber concrete has excellent elasticity, crack resistance and impact resistance. The use of rubber concrete to cast the concrete slab 2 can effectively alleviate the dynamic load and vibration borne by the composite beam, reduce the formation and expansion of cracks, and also improve the durability of the composite beam and extend the service life of the composite beam.

[0032] It is worth mentioning that because the flange of the I-beam is very wide, the side of the flange has strong hardness and strong bending resistance, and is not easy to bend. Therefore, the transverse steel bars 4 and the concrete slab 2 can be designed to protrude from the I-beam in the transverse direction, while ensuring the stability of the overall structure and helping to save the use of steel bars and I-beams.

[0033] Furthermore, the longitudinal steel bars 5, the transverse steel bars 4 and the shear connector 3 are connected by binding, and the binding method is used to make the connection between the longitudinal steel bars 5, the transverse steel bars 4 and the shear connector 3 more secure.

[0034] Furthermore, the shear connector 3 is a stud. The stud's specification is preferably D19×100. Compared with traditional welding and steel bar button connections, the stud-based connection system allows for quick and convenient on-site connection, reducing connection time and labor consumption. Furthermore, the stud's high rigidity, high stiffness, and strong energy dissipation capabilities can improve the overall rigidity and seismic resistance of the composite beam structure. Furthermore, the stud's high load-bearing capacity in both tension and shear ensures the strength of the composite beam. Finally, the stud's high energy absorption properties can effectively increase the bonding area between concrete and steel bars, making the composite beam structure more resilient and durable.

[0035] Furthermore, the studs are welded to the top surface of the steel beam 1 , and the welding method is used to make the connection between the studs and the steel beam 1 more secure.

[0036] Furthermore, the longitudinal reinforcement 5 and the transverse reinforcement 4 are both made of HRB400 reinforcement, which is made of hot-rolled low-carbon steel and has good ductility, strength and tensile strength, and can withstand greater loads, so that the composite beam structure has a longer service life.

[0037] Furthermore, the diameter of the longitudinal reinforcement 5 is larger than that of the transverse reinforcement 4. This is because the longitudinal direction is the primary force-bearing direction for this composite beam structure. Therefore, the diameter of the longitudinal reinforcement 5 must be larger than that of the transverse reinforcement 4 to ensure adequate force bearing. Furthermore, experimental verification has shown that the composite beam structure in this application can utilize longitudinal reinforcement 5 with a diameter ranging from 16-25 mm and transverse reinforcement 4 with a diameter ranging from 12-16 mm to reduce reinforcement bending and ensure adequate force bearing.

[0038] In addition, the present invention also provides a beam assembly, including the above-mentioned composite beam, wherein a plurality of the steel beams 1 are arranged in sequence in the transverse and / or longitudinal directions, wherein in two adjacent composite beams in the transverse direction, the transverse reinforcements 4 are connected in a one-to-one correspondence, and in two adjacent composite beams in the longitudinal direction, the longitudinal reinforcements 5 are connected in a one-to-one correspondence, and the plurality of concrete slabs 2 are formed by integral casting. After the steel beams 1 and reinforcements are erected, rubber concrete is poured so that the concrete slabs 2 are formed in one step. The concrete slabs 2 are anchored to the shear assembly, which can effectively disperse and transfer the load, enhance the bending resistance of the bridge deck structure, and reduce local stress concentration. In addition, this solution can save the amount of reinforcement, reduce construction time, and improve construction efficiency.

[0039] Finally, the utility model also provides a bridge, comprising the above-mentioned beam assembly, which has good toughness and durability and extends the service life.

[0040] In summary, the composite beam provided in this embodiment can enhance the shear resistance of the structure, reduce the occurrence of cracks, improve the durability and stability of the structure, and extend the service life of the composite beam.

[0041] This specification discloses the present application with reference to the accompanying drawings and also enables those skilled in the art to practice the present application, including making and using any device or system, employing suitable materials, and using any combined methods. The scope of the present application is defined by the claimed technical solution and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the claimed technical solution, or such other examples include equivalent structural elements that are not substantially different from the literal language of the claimed technical solution, such other examples should be deemed to be within the scope of protection determined by the claimed technical solution.

Claims

1. A composite beam, characterized in that: include: steel beams, shear components, and concrete slabs; The steel beam is an I-beam, and the steel beam extends in the longitudinal direction; The concrete slab is arranged on the top surface of the steel beam, and the shear resistant component is located on the top surface of the steel beam and embedded in the bottom of the concrete slab; The concrete slab is cast by using rubber concrete; The shear-resistant assembly includes multiple shear connectors, multiple longitudinal steel bars and multiple transverse steel bars. The multiple longitudinal steel bars are evenly arranged along the transverse direction of the top surface of the steel beam, and the multiple transverse steel bars are evenly arranged along the longitudinal direction of the top surface of the steel beam. The longitudinal steel bars and the transverse steel bars are arranged crosswise. The shear connectors are fixedly connected to the top surface of the steel beam, and the multiple shear connectors are connected one-to-one to the intersections of the multiple longitudinal steel bars and the transverse steel bars. The longitudinal steel bars, the transverse steel bars and the shear connectors are fixedly connected.

2. The composite beam according to claim 1, wherein: The longitudinal steel bars, the transverse steel bars and the shear connectors are connected by binding.

3. The composite beam according to claim 1, wherein: The shear connector is a stud.

4. The composite beam according to claim 3, wherein: The studs are welded to the top surface of the steel beam.

5. The composite beam according to claim 1, wherein: The longitudinal steel bars and the transverse steel bars are both HRB400 steel bars.

6. The composite beam according to claim 5, wherein: The diameter of the longitudinal steel bars is larger than that of the transverse steel bars.

7. The composite beam according to claim 6, wherein: The diameter of the longitudinal steel bars is between 16-25 mm, and the diameter of the transverse steel bars is between 12-16 mm.

8. A beam assembly, characterized in that: comprising a plurality of composite beams according to any one of claims 1 to 7, The plurality of steel beams are arranged in sequence in the transverse and / or longitudinal direction. In two transversely adjacent composite beams, the transverse steel bars are connected one by one. In two longitudinally adjacent composite beams, the longitudinal steel bars are connected one by one. The plurality of concrete slabs are formed by integral casting.

9. A bridge, characterized in that: Comprising the beam assembly of claim 8.

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