Steel-concrete composite beam
By using perforated webs and corrugated steel bars in PEC beams, the problem of thick webs and the need for many studs in H-beams was solved, achieving material savings, cost reduction, and simplified construction, thus enhancing the economy and stability of the structure.
Patent Information
- Application Number
- CN202423231918.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-26
AI Technical Summary
The existing PEC beams have thick H-shaped steel webs, resulting in low economic efficiency and requiring a large number of studs, which makes construction inconvenient.
The upper and lower flanges are connected by perforated webs and corrugated steel bars, and concrete is poured in between to form a steel-concrete composite beam. This reduces or eliminates the need for studs, enhances the anchoring effect through honeycomb perforations, and improves the anchoring effect by using corrugated steel bars.
It saves materials and costs, simplifies the construction process, improves the economy and stability of the structure, enhances the load-bearing capacity, and is suitable for composite beams with larger cross-sectional heights.
Smart Images
Figure CN223689071U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of building engineering, specifically relates to a steel - concrete composite beam. BACKGROUND
[0002] Partially encased steel-concrete composite beam (PEC beam) is a new type of composite structure technology, which is formed by welding steel bars or flat steel in the cavity of H-shaped steel and pouring concrete. Compared with the traditional steel-concrete composite beam, PEC beam not only has good fire resistance, but also has increased carrying capacity, stiffness and buckling resistance. The stiffness analysis of PEC beam under negative bending moment shows that the bending resistance and stiffness of PEC beam are increased by 40% and 25% respectively compared with ordinary steel-concrete composite beam. In addition, PEC beam performs excellently in crack width, carrying capacity and crack control, and has good ductility.
[0003] Due to the encasement of concrete, the web of H-shaped steel can be made thinner, but currently PEC beam mainly uses hot-rolled H-shaped steel or welded H-shaped steel, the web thickness is relatively large, and the economy needs to be improved. At the same time, in order to increase the combination of encased concrete and H-shaped steel beam, in addition to welding steel bars, a large number of dowels need to be arranged on the web of steel beam, which is complex in structure and causes great inconvenience in other operations during construction. SUMMARY
[0004] In view of the above problems in the prior art, the utility model aims to provide a steel-concrete composite beam to solve the problem of thick H-shaped steel web of the composite beam and the inconvenience caused by a large number of dowels in the prior art.
[0005] To solve the above technical problems, the utility model adopts the following technical scheme:
[0006] A steel-concrete composite beam, the composite beam comprises an upper flange and a lower flange, the length direction of the upper flange and the lower flange is parallel to each other, a plurality of connecting members are arranged between the upper flange and the lower flange, the opposite sides of the connecting members are fixedly connected with the opposite sides of the upper flange and the lower flange respectively; a plurality of longitudinal reinforcement bars are arranged between the upper flange and the lower flange, the length direction of the longitudinal reinforcement bars is consistent with the length direction of the upper flange, and the longitudinal reinforcement bars are located on the two sides away from each other of the connecting members respectively; a plurality of stirrups are arranged outside the longitudinal reinforcement bars, the stirrups are distributed along the length direction of the longitudinal reinforcement bars, and the stirrups are fixedly connected with the longitudinal reinforcement bars; and concrete is poured between the upper flange and the lower flange, so that the concrete completely covers the connecting members, the longitudinal reinforcement bars and the stirrups to form the steel-concrete composite beam.
[0007] Preferably, the connecting member is a web plate, two side edges of the web plate are fixedly connected with opposite sides of the upper flange and the lower flange respectively along the width direction of the web plate; a plurality of openings are formed in the web plate, the openings are uniformly distributed along the length direction of the web plate and penetrate through the upper and lower side walls of the web plate.
[0008] Preferably, the opening is one of hexagonal or circular.
[0009] Preferably, the upper flange has an upper connecting section on the side facing the lower flange, the lower flange has a lower connecting section on the side facing the upper flange; the connecting member is two wave-shaped steels, the two wave-shaped steels are located on the two sides of the upper connecting section away from each other, the wave crest of the wave-shaped steel is fixedly connected with the upper connecting section, and the wave trough of the wave-shaped steel is fixedly connected with the lower connecting section.
[0010] Preferably, a plurality of shear connectors are further arranged above the upper flange, the shear connectors are distributed along the length direction of the upper flange, and the bottom of the shear connector is fixedly connected with the upper side surface of the upper flange.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] 1. The combined beam adopts the web plate with openings to connect the upper flange and the lower flange, and the web plate with honeycomb openings is specially designed, which not only saves materials and reduces costs, but also enhances the anchoring effect between the openings and the coated concrete, forms the "combined tenon effect", so as to not only reduce the setting amount of the traditional studs, but also completely set up the studs, thereby simplifying the structure and reducing the production difficulty; compared with the traditional solid web plate, the design of the honeycomb web plate can further save the amount of steel under the premise of ensuring the same bearing capacity, improve the economic benefit.
[0013] 2. The utility model further adopts the wave-shaped steel to connect the two T-shaped upper flanges and lower flanges, which not only saves materials, but also enhances the anchoring effect of the wave-shaped steel and the coated concrete, which helps to reduce or eliminate the need for studs. Such design not only improves the economy of the structure, but also increases the stability and bearing capacity of the structure, which is suitable for the combined beam with large cross-sectional height. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of one of the embodiments of the steel-concrete composite beam of the utility model.
[0015] Figure 2 It is a structural schematic view of the steel-concrete composite beam and the reinforced concrete floor connected in the utility model.
[0016] Figure 3 It is a processing flow chart of the web plate in the utility model.
[0017] Figure 4 Another embodiment structure diagram of the steel-concrete composite beam.
[0018] Figure 5 The structure diagram after the upper flange, the lower flange and the corrugated reinforcement are connected.
[0019] Figure 6 The structure diagram after the steel-concrete composite beam and the reinforced concrete floor are connected
[0020] In the figure: upper flange 1, lower flange 2, longitudinal reinforcement 3, stirrup 4, concrete 5, web 6, opening 7, upper connecting section 8, lower connecting section 9, corrugated reinforcement 10, shear connector 11, reinforced concrete floor 12. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the utility model belong to the protection scope of the utility model.
[0022] The utility model provides a kind of steel-concrete composite beam, as shown in Figures 1-6 The upper flange and the lower flange are parallel to each other in length direction, i.e. the upper flange and the lower flange are both laid along horizontal direction, so that the planes where they are located are parallel to each other. A plurality of connecting members are provided between the upper flange and the lower flange, and opposite sides of the connecting members are respectively fixedly connected to opposite sides of the upper flange and the lower flange. A plurality of longitudinal reinforcements 3 are laid between the upper flange and the lower flange, and the longitudinal reinforcements are parallel to the upper flange in length direction, and the longitudinal reinforcements are respectively located on two sides away from each other of the connecting members, so that the cross section of the plurality of longitudinal reinforcements presents square distribution. A plurality of stirrups 4 are further sleeved outside the plurality of longitudinal reinforcements, and the stirrups are distributed in length direction of the longitudinal reinforcements at intervals and are fixedly connected to the longitudinal reinforcements; and concrete 5 is poured between the upper flange and the lower flange, so that the concrete completely covers the connecting members, the longitudinal reinforcements and the stirrups to form the steel-concrete composite beam. In actual construction, the upper flange and the lower flange are both steel plates, and the two can be connected by different forms of connecting members.
[0023] In one embodiment of the utility model, as Figure 1As shown, the connecting member is a web plate 6, which is fixedly connected with one side of the upper flange and the lower flange respectively along the two side edges of the web plate in the width direction; a plurality of openings 7 are formed on the web plate, which are uniformly distributed along the length direction of the web plate and penetrate through the upper and lower side walls of the web plate. The openings are one of hexagonal or circular, and are preferably hexagonal, so that the openings on the web plate are in a honeycomb shape. This structure is not only convenient for processing, but also can save materials and improve economy. On the other hand, the web plate with this shape of openings can enhance the anchoring effect with the coated concrete, form a combined tenon effect, so as to achieve the purpose of reducing or not setting the studs, so that the structure is simpler and more convenient for production. In this embodiment, the processing method of the web plate is as follows: the steel plate is cut along the middle fold line, then the hexagonal honeycomb structure is formed by staggered splicing, the splicing part is fixedly connected by welding, and the web plate with openings is formed, as shown in Figure 3 In this embodiment, the longitudinal reinforcement near the upper flange and the longitudinal reinforcement near the lower flange are fixedly connected with the stirrups by binding, and the rectangular stirrups are fixedly connected with the web plate by welding.
[0024] In another embodiment of the present application, as shown in Figures 4-5 The upper flange has an upper connecting section 8 on the side facing the lower flange, so that the cross section of the upper flange is in T shape. The lower flange has a lower connecting section 9 on the side facing the upper flange, so that the cross section of the lower flange is also in T shape. However, there is a certain gap between the upper connecting section of the upper flange and the lower connecting section of the lower flange. The connecting member is two wave-shaped steel bars 10, which are located on the two sides of the upper connecting section away from each other, and the peaks of the wave-shaped steel bars are fixedly connected with the upper connecting section, and the valleys are fixedly connected with the lower connecting section. In this embodiment, the wave-shaped steel bars are used to weld the two T-shaped steel members to form a steel member with a truss structure in the middle and an H-shaped cross section. When the beam height is large, especially when the height of the steel beam cross section is greater than 700 mm, this embodiment can be used. On the one hand, it can further save materials and improve economy; on the other hand, the wave-shaped steel bars can enhance the anchoring effect with the coated concrete, so as to achieve the purpose of reducing or not setting the studs, so that the structure is simpler and more convenient for production. The longitudinal reinforcement near the upper flange and the longitudinal reinforcement near the lower flange are fixedly connected with the stirrups by binding, and the rectangular stirrups are fixedly connected with the upper connecting section of the upper flange and the lower connecting section of the lower flange by welding.
[0025] In some embodiments of the present application, a plurality of shear connectors 11 are further arranged above the upper flange, which are distributed along the length direction of the upper flange, and the bottom of the shear connector is fixedly connected with the upper side surface of the upper flange. As shown in Figure 2 and 6As shown, the composite beam can be connected with the reinforced concrete floor through shear connectors, and the shear connectors can adopt shear studs, channel steels and other components to connect the composite beam and the reinforced concrete floor to form a whole.
[0026] The utility model is not limited to the above-mentioned implementation, and uses the same or similar structure as the above-mentioned embodiments of the utility model, which are all within the protection scope of the utility model.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit the technical solutions, and those skilled in the art should understand that those who modify or equivalently replace the technical solutions of the utility model without departing from the purpose and scope of the technical solutions should be covered in the claim scope of the utility model.
Claims
1. A steel-concrete composite beam, characterized by The composite beam comprises an upper flange (1) and a lower flange (2), the length directions of the upper flange and the lower flange are parallel to each other, a plurality of connecting members are arranged between the upper flange and the lower flange, and opposite sides of the connecting members are fixedly connected with opposite sides of the upper flange and the lower flange, respectively; A plurality of longitudinal reinforcements (3) are arranged between the upper flange and the lower flange, the length directions of the longitudinal reinforcements are consistent with the length direction of the upper flange, and the longitudinal reinforcements are arranged on two sides of the connecting members away from each other, respectively; a plurality of stirrups (4) are arranged outside the longitudinal reinforcements, the stirrups are distributed along the length direction of the longitudinal reinforcements, and the stirrups are fixedly connected with the longitudinal reinforcements; Concrete (5) is poured between the upper flange and the lower flange, so that the concrete completely covers the connecting members, the longitudinal reinforcements and the stirrups to form the steel-concrete composite beam.
2. The steel-concrete composite beam according to claim 1, characterized in that The connecting member is a web (6), the two side edges of the web along the width direction are fixedly connected with opposite sides of the upper flange and the lower flange, respectively; a plurality of openings (7) are arranged on the web, the openings are uniformly distributed along the length direction of the web, and the openings penetrate through the upper and lower side walls of the web.
3. The steel-concrete composite beam according to claim 2, characterized in that The opening is one of a hexagon or a circle.
4. The steel-concrete composite beam according to claim 1, characterized in that The upper flange has an upper connecting section (8) on the side facing the lower flange, the lower flange has a lower connecting section (9) on the side facing the upper flange; the connecting member is two wave-shaped reinforcements (10), the two wave-shaped reinforcements are arranged on two sides of the upper connecting section away from each other, the wave crest of the wave-shaped reinforcement is fixedly connected with the upper connecting section, and the wave trough of the wave-shaped reinforcement is fixedly connected with the lower connecting section.
5. The steel-concrete composite beam according to claim 1, wherein A plurality of shear connectors (11) are arranged above the upper flange, the shear connectors are distributed along the length direction of the upper flange, and the bottom of the shear connector is fixedly connected with the upper side surface of the upper flange.