Corrugated steel web composite beam
By adopting corrugated steel web combined beam structure in steel-concrete composite beams and combining the use of bolted connectors, the problem of traditional steel-concrete composite beams withstand large shear stress at the fulcrum of the bridge pier is solved, the shear buckling strength and support strength of the beam are improved, and the self-weight is reduced and the bearing capacity is improved.
Patent Information
- Application Number
- CN202422061670.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-26
AI Technical Summary
Traditional steel-concrete composite beams bear large shear stress at the fulcrum of the bridge pier, resulting in the need to increase stiffener ribs on the steel web, increase the project cost and increase the welding process, resulting in significant welding fatigue effect.
The corrugated steel web combined beam structure is adopted, including horizontal steel roof plate, horizontal steel base plate and planar steel web. The flat steel web is equipped with corrugated web sections bent along the length direction, and the corrugated upper and lower support plates are fixed through bolted connectors to reduce welding and increase the thickness of the connection.
The shear buckling strength and lateral flexural stiffness of steel-concrete composite beams are improved, the shear stress and bending regular stress of edges of corrugated web sections are overcome, the support strength is enhanced, the self-weight is reduced, the bearing capacity is improved, and the construction and assembly is convenient.
Smart Images
Figure CN222935829U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge construction, in particular to a corrugated steel web composite beam. Background Art
[0002] With the gradual promotion of the concept of green highway construction, standardized and industrialized steel-concrete composite beams have received increasing attention. Traditional steel-concrete composite beams mostly adopt I-beam structures with flat steel plates as webs. At the pier supports, they often bear large shear stresses. To prevent buckling of the steel web, vertical or longitudinal stiffeners need to be added, increasing the project cost and the number of welding processes, and then resulting in a significant welding fatigue effect. Summary of the Invention
[0003] The purpose of the utility model is to provide a corrugated steel web composite beam aiming at the defects of the prior art.
[0004] To achieve the above purpose, the utility model can adopt the following technical solutions:
[0005] The corrugated steel web composite beam of the utility model includes an I-shaped steel beam composed of a horizontal steel top plate, a horizontal steel bottom plate and a flat steel web, and a concrete bridge deck laid on the horizontal steel top plate; at least one corrugated web section bent along the length direction is provided on the flat steel web, a corrugated upper support plate with the upper edge abutted against the horizontal steel top plate and a corrugated lower support plate with the lower edge abutted against the horizontal steel bottom plate are arranged on the corrugated web section, and both the corrugated upper support plate and the corrugated lower support plate are fixedly attached to one side surface of the corrugated web section through bolt connectors.
[0006] Specifically, the length of each corrugated web section is 4 - 5m; both the corrugated upper support plate and the corrugated lower support plate are corrugated steel plates with a height of 15 - 20cm and a thickness of 9 - 40mm, and are fixedly attached to the same side surface of the corrugated web section.
[0007] The utility model has the advantages that the I-shaped steel beam is composed of a horizontal steel top plate, a horizontal steel bottom plate and a flat steel web, and at least one corrugated web section is arranged on the flat steel web, so that in the construction of the steel-concrete composite beam, the corrugated web section on the flat steel web can be aligned with the pier support, improving the shear buckling strength and increasing the lateral flexural stiffness of the steel-concrete composite beam; in addition, the corrugated upper support plate and the corrugated lower support plate fixedly attached to the upper and lower edges of the corrugated web section through bolt connectors can also reduce welding while increasing the thickness at the connection between the corrugated web section and the horizontal steel top plate and the horizontal steel bottom plate, effectively overcoming the shear stress and part of the bending normal stress borne at the edge of the corrugated web section, improving the support strength of the steel-concrete composite beam, reducing the self-weight, enhancing the bearing capacity, facilitating construction and assembly, and being beneficial to the further popularization and application of steel-concrete composite bridges. Brief Description of the Drawings
[0008] Figure 1 is a schematic structural view of the present utility model.
[0009] Figure 2 is Figure 1 an enlarged left view of
[0010] Figure 3 is Figure 1 an isometric view of (hiding the bolt connectors). Detailed Description of the Preferred Embodiment
[0011] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.
[0012] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0013] As Figures 1 - 3 shown, the corrugated steel web composite beam of the present utility model includes an I-shaped steel beam composed of a horizontal steel top plate 1, a horizontal steel bottom plate 2, and a flat steel web 3, and a concrete bridge deck 4 with a thickness of 0.2 m to 0.5 m laid on the horizontal steel top plate 1 of the I-shaped steel beam. At least one corrugated web section 5 bent along its length direction is provided on the flat steel web 3. The length of each corrugated web section 5 is 4 to 5 m. The number of corrugated web sections 5 can be determined according to the number of bridge piers in the actual construction, as long as each pier support corresponds to one corrugated web section 5, so that the shear buckling strength of the entire steel-concrete composite beam can be improved and the lateral flexural stiffness can be increased.
[0014] In addition, since within a certain range along the web height direction at the intersection of the corrugated web section 5 and the horizontal steel top plate 1 and the horizontal steel bottom plate 2, there is not only shear stress but also partial bending normal stress, the most unfavorable combination of shear stress and bending normal stress will act on the upper and lower edges of the corrugated web section 5. When the stress combination effect at this place reaches the yield state, it should be calculated according to the actual situation in accordance with (wherein, f dIt is controlled by the design value of the tensile strength of the steel, where σ is the bending normal stress and τ is the shear stress of the web. Therefore, on each corrugated web segment 5, there is also a corrugated upper support plate 6 with its upper edge abutting against the lower surface of the horizontal steel roof plate 1, and a corrugated lower support plate 7 with its lower edge abutting against the upper surface of the horizontal steel bottom plate 2. Both the corrugated upper support plate 6 and the corrugated lower support plate 7 are corrugated steel plates with a height of 15 - 20 cm and a thickness of 9 - 40 mm, and are fixedly attached to the same side plate surface of the corrugated web segment 5 through bolt connectors 8. The corrugated upper support plate 6 and the corrugated lower support plate 7 that are fixedly attached to the upper and lower edges of the corrugated web segment 5 through bolt connectors 8 can increase the thickness at the connection between the corrugated web segment 5 and the horizontal steel roof plate 1 and the horizontal steel bottom plate 2 while reducing welding, effectively overcoming the shear stress and part of the bending normal stress borne at the edge of the corrugated web segment 5, improving the support strength of the entire steel-concrete composite beam, reducing its self-weight, enhancing its bearing capacity, facilitating construction and assembly, and being conducive to the further popularization and application of steel-concrete composite bridges.
Claims
1. A composite beam with corrugated steel webs, comprising an I-shaped steel beam consisting of a horizontal steel top plate, a horizontal steel bottom plate and a flat steel web, and a concrete bridge deck laid flat on the horizontal steel top plate; characterized in that: The flat steel web has at least one corrugated web section bent along its length direction, and the corrugated web section is provided with a corrugated upper support plate whose upper edge is abutted against the horizontal steel top plate, and a corrugated lower support plate whose lower edge is abutted against the horizontal steel bottom plate. The corrugated upper support plate and the corrugated lower support plate are both fixed to one side plate surface of the corrugated web section by bolt connectors.
2. The corrugated steel web composite beam according to claim 1, characterized in that: The length of each corrugated web section is 4 to 5 m.
3. The corrugated steel web composite beam according to claim 1, characterized in that: The corrugated upper support plate and the corrugated lower support plate are both corrugated steel plates with a height of 15-20 cm and a thickness of 9-40 mm, and are attached to the same side plate surface of the corrugated web section.