Steel beam concrete composite column structure

Abstract

The present invention discloses a steel-bundle concrete composite column structure, comprising: a hollow steel bundle, comprising a plurality of webs and two oppositely arranged load-bearing steel members, the load-bearing steel members being arranged vertically and having a first side and a second side opposite to each other, a plurality of webs being connected between the two sides of the load-bearing steel members, the plurality of webs being spaced apart along the length direction of the load-bearing steel members; and plain concrete, covering the two load-bearing steel members and the plurality of webs to consolidate to form a consolidated body, the plain concrete protective layer on the outer side of the hollow steel bundle having a thickness of 20-50 mm, the two ends of the load-bearing steel members being extended to form connecting portions, the connecting portions extending to the outside of the consolidated body. The present invention solves the problems of poor load-bearing system in prefabricated concrete structural systems in existing construction projects, the loose sleeve grouting at the connection, especially the stress at the node, the insufficient seismic performance, the need for fire retardant coatings in steel-concrete composite structural systems, the long construction period, the high cost, and the difficulty in decoration.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, in particular to a steel bundle concrete composite column structure. Background Art

[0002] At present, the problems of prefabricated concrete structure systems in construction projects include: poor stress system, especially insufficient stress and seismic performance at the nodes, which limits the height; only prefabricated wall panels, floor slabs, stair slabs and other components can be used, which are basically assembled for assembly purposes, and the vertical stress system is still imperfect, which limits the development and promotion of prefabrication; sleeve grouting cannot ensure dense connections, which becomes a huge hidden danger; the existing steel-concrete composite structure system is complex to process and connect on site; it requires fire retardant coatings, which is expensive; and the construction period is long. Summary of the Invention

[0003] In order to overcome the defects of the existing technology, a steel-concrete composite column structure is now provided to solve the problems of poor stress system in the prefabricated concrete structure system in existing construction projects, especially the node stress and insufficient seismic performance, the need for fire-retardant coating in the steel-concrete composite structure system, long construction period, high cost and difficulty in decoration.

[0004] To achieve the above object, a steel-bundle-concrete composite column structure is provided, comprising:

[0005] A hollow steel beam comprises a plurality of webs and two oppositely arranged load-bearing steel members, wherein the load-bearing steel members are vertically arranged and have a first side and a second side opposite to each other, and a plurality of webs are respectively connected between the first sides of two adjacent load-bearing steel members and between the second sides of two adjacent load-bearing steel members, and the plurality of webs are arranged at intervals along the length direction of the load-bearing steel members; and plain concrete is coated on the two load-bearing steel members and the plurality of webs to consolidate to form a consolidated body, the plain concrete on the outer side of the hollow steel beam has a thickness of 20-50 mm, and both ends of the load-bearing steel member extend to form connecting portions, and the connecting portions extend to the outside of the consolidated body.

[0006] Furthermore, flange plates are formed on the first side and the second side of the load-bearing steel member respectively, and the web is connected between the flange plates of two adjacent load-bearing steel members.

[0007] Furthermore, the load-bearing steel member is any one of H-steel with equal flange width, H-steel with unequal flange width, and H-steel with transverse stiffening ribs and longitudinal stiffening ribs.

[0008] Furthermore, the thickness of the plain concrete on the outer side of the hollow steel bundle is 25 mm.

[0009] Furthermore, the length of the connecting portion is 300 mm to 500 mm.

[0010] Furthermore, the outer side of the hollow steel bundle is covered with an anti-cracking steel mesh, and the plain concrete is covered on the steel mesh.

[0011] Furthermore, a vertically arranged secondary casting through hole is formed inside the consolidated body, and the secondary casting through hole is located on the inner side of the hollow steel bundle.

[0012] The beneficial effect of the present invention is that the steel-bundle concrete composite column structure of the present invention forms an internally hollowed hollow steel bundle through the load-bearing steel member and the webs on both sides thereof, and the steel bundle completely replaces the steel bars. Since a plurality of webs are arranged at intervals to form a gap connecting the inner and outer sides of the hollow steel bundle, a solid body is formed after the hollow steel bundle is cast and coated with plain concrete. The solid body is not interrupted by the hollow steel bundle, so the integrity of the plain concrete solid body is good, and there is no need to set additional steel bars to improve the strength of the solid body, so that the thickness of the plain concrete on the outer side of the hollow steel bundle is small. The hollow steel bundle of the steel-bundle concrete composite column structure of the present invention cooperates with the plain concrete to improve the bearing capacity and seismic performance of the steel-bundle concrete composite column structure, and the connection part of the load-bearing steel member can be quickly installed and connected, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0014] Figure 1 Schematic diagram of the structure of the steel-bundle concrete composite column structure according to an embodiment of the present invention.

[0015] Figure 2 It is a top view of the steel-concrete composite column structure according to an embodiment of the present invention.

[0016] Figure 3 Schematic diagram of the structure of a hollow steel bundle according to an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the arrangement of secondary pouring holes in an embodiment of the present invention.

[0018] Figure 5 This is a structural schematic diagram of an H-shaped steel strip with stiffening ribs in an embodiment of the present invention.

[0019] Figure 6 This is a schematic structural diagram of an embodiment of the present invention in which the load-bearing steel member is a channel steel.

[0020] Figure 7This is a schematic structural diagram of an embodiment of the present invention in which the load-bearing steel member is an H-shaped steel and the flange plate of the H-shaped steel extends to the side of the plain concrete.

[0021] Figure 8 This is a structural schematic diagram of an embodiment of the present invention in which the load-bearing steel member is an H-shaped steel with stiffening ribs, and the flange plate and stiffening ribs of the H-shaped steel extend to the side of the plain concrete. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0023] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] Reference Figures 1 to 8 As shown, the present invention provides a steel-concrete composite column structure, comprising: a hollow steel bundle 1 and plain concrete.

[0025] Specifically, the hollow steel bundle 1 includes a plurality of webs 12 and two load-bearing steel members 11. Each load-bearing steel member 11 is arranged vertically, and the two load-bearing steel members are arranged opposite to each other. The load-bearing steel member 11 has a first side and a second side opposite to each other in its width direction, and a third side and a fourth side in its thickness direction. The third sides of the two load-bearing steel members are arranged opposite to each other. A plurality of webs 12 are connected between the first sides of two adjacent load-bearing steel members 11. A plurality of webs 12 are connected between the second sides of the two load-bearing steel members 11. The plurality of webs 12 on each side of the load-bearing steel member (i.e., the first side or the second side of the load-bearing steel member) are spaced apart along the length direction of the load-bearing steel member 11.

[0026] Plain concrete is coated around the two load-bearing steel members 11 and the multiple webs 12 to form the consolidated body 2. The ends of the load-bearing steel members 11 extend to form connecting portions 111. Connecting portions 111 extend to the exterior of the consolidated body 2. The thickness of the plain concrete on the exterior of the hollow steel strands is 20-50 mm. Preferably, the thickness is 25 mm.

[0027] The steel-bundle-concrete composite column structure of the present invention forms an internally hollowed hollow steel bundle through the load-bearing steel member and the webs on both sides thereof, and the steel bundle completely replaces the steel bars. Since a plurality of webs are arranged at intervals to form a gap connecting the inner and outer sides of the hollow steel bundle, a consolidated body is formed after the hollow steel bundle is cast and coated with plain concrete. The consolidated body is not interrupted by the hollow steel bundle, so the integrity of the plain concrete consolidated body is good, and there is no need to set additional steel bars to improve the strength of the consolidated body, so that the thickness of the plain concrete on the outer side of the hollow steel bundle is relatively small. The hollow steel bundle of the steel-bundle-concrete composite column structure of the present invention cooperates with the plain concrete to improve the bearing capacity and seismic performance of the steel-bundle-concrete composite column structure, and the connection part of the load-bearing steel member can be quickly installed and connected, thereby improving construction efficiency.

[0028] As a preferred embodiment, the consolidation body is formed with vertical secondary casting holes 20. These holes are located inside the hollow steel strands and have a diameter of approximately 100 mm. The reserved secondary casting holes within the consolidation body of the steel-bundle-concrete composite column structure of the present invention address the issue of various sleeve grouting methods failing to ensure a dense cast after on-site docking.

[0029] In addition, the steel-bundle concrete composite column structure of the present invention is different from the traditional steel-concrete column in three main aspects:

[0030] 1. The steel members in the traditional steel-concrete columns are solid steel members, while the steel-bundle concrete composite column structure of the present invention adopts hollow steel bundles.

[0031] 2. The protective layer on the outside of the steel components of traditional steel-concrete columns is ≥120mm according to the requirements of the "Technical Code for Steel-Concrete Composite Structures". However, after the hollow steel bundles are adopted in the steel-bundle concrete composite column structure of the present invention, the thickness of the protective layer on the outside of the hollow steel bundles is only 20-50mm.

[0032] 3. The outer side of the steel structure of the traditional steel-concrete column needs to be equipped with a large number of longitudinal stress-bearing steel bars and stirrups, which prolongs the on-site construction period and complicates the construction at the beam-column-slab node. However, the outer side of the hollow steel bundle of the steel-bundle concrete composite column structure of the present invention is not equipped with any steel bars.

[0033] The steel-bundle concrete composite column structure of the present invention adopts a hollow steel bundle arranged in plain concrete. Since it is wrapped in plain concrete and not exposed, on the one hand, fire retardant coating is saved, and on the other hand, the outer surface of the steel-bundle concrete composite column structure is concrete, which is convenient for decoration.

[0034] In the steel-bundle-concrete composite column structure of the present invention, the hollow steel bundles bear 80% of the load, while the plain concrete bears only 20%. Furthermore, because the steel members of the steel-bundle-concrete composite column structure of the present invention are positioned away from the central axis of the structural cross-section, the cross-sectional rigidity is maximized, thereby saving material.

[0035] The exposed connecting plate of the load-bearing steel member of the steel-bundle concrete composite column structure of the present invention is 300mm to 500mm long in the vertical direction and is cast in ordinary reinforced concrete, thereby simplifying the prefabrication of the overall member. During installation, the connecting portion exposed in the plain concrete serves as the docking portion for on-site installation of the overall member, so that the overall member can be bolted together like a steel structure member, achieving a quick and efficient connection without affecting subsequent processes, greatly saving construction time. The on-site docking of the steel-bundle concrete composite column structure of the present invention is located 600-1000mm from both ends. After the two adjacent connecting portions are docked, concrete is poured again through the secondary pouring holes set inside, which not only ensures a very small on-site pouring amount, in line with the direction of industrialization policy, but also solves the quality problem of using sleeve grouting and the like that cannot ensure the density of concrete; the docking section (post-casting section) is about 1000mm away from the floor, so that the docking section (post-casting section) of the structure is away from the node area, thereby strengthening the integrity of the node; it also makes the docking section (post-casting section) of the column in a place where the shear force and bending moment are relatively small, in line with the principle of setting construction joints, thereby greatly strengthening the load-bearing performance of the overall structure. In general, the steel-bundle concrete composite column structure of the present invention uses the construction method of steel structure to implement the overall structure to achieve the purpose of rapid construction; the overall structure is completed with the concept of mostly prefabrication and only the docking section (post-cast section) on site to achieve the purpose of industrialization; the concrete surface is used to facilitate the purpose of later interior decoration; because the hollow steel bundles and plain concrete of the steel-bundle concrete composite column structure of the present invention can better form a whole, the steel-bundle concrete composite column structure of the present invention has better seismic resistance and stress-bearing performance.

[0036] In a preferred embodiment, flange plates are formed on the first and second sides of the load-bearing steel member 11. The web 12 connects the flange plates of two adjacent load-bearing steel members 11. In this embodiment, the load-bearing steel member 11 is an H-shaped steel. Furthermore, the load-bearing steel member can be any of H-shaped steel with equal flange widths, H-shaped steel with unequal flange widths, or H-shaped steel with transverse and longitudinal stiffening ribs.

[0037] In some embodiments, the load-bearing steel member may also be a channel steel (such as Figure 6 As shown), welded H-beam, H-beam with stiffening ribs (as shown Figure 5As shown), channel steel with stiffening ribs, welded H-shaped steel with stiffening ribs. The web is a steel plate and steel section, specifically, angle steel, H-steel, channel steel. The thickness of the web is the same as the thickness of the flange plate of the load-bearing steel section. The web is welded or bolted to the flange plates of two adjacent load-bearing steel sections to form a hollow steel bundle. Figure 7 and Figure 8 As shown, the load-bearing steel member is an H-shaped steel with stiffening ribs, and the stiffening ribs and flange plates on one side of the load-bearing steel member extend to the outer side surface of the plain concrete.

[0038] In a preferred embodiment, the outer side of the hollow steel bundle 1 is coated with a crack-proof steel mesh, and the plain concrete is coated on the anti-cracking steel mesh. Specifically, the anti-cracking steel mesh is a steel mesh. The anti-cracking steel mesh is installed on the outer side of the load-bearing steel member using self-tapping screws. The anti-cracking steel mesh effectively binds the concrete outside the hollow steel bundle during use, preventing it from falling off and preventing cracking in the steel-concrete composite column structure of the present invention.

[0039] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A steel beam concrete composite column structure, characterized in that: include: A hollow steel beam bundle includes a plurality of webs and two oppositely arranged load-bearing steel members, wherein the load-bearing steel members are vertically arranged and have a first side and a second side opposite to each other. A plurality of webs are respectively connected between the first sides of two adjacent load-bearing steel members and between the second sides of two adjacent load-bearing steel members. The plurality of webs are spaced apart along the length direction of the load-bearing steel members. Flanges are respectively formed on the first side and the second side of the load-bearing steel members. The webs are connected between the flanges of the two adjacent load-bearing steel members. as well as Plain concrete is coated on the two load-bearing steel members and the plurality of webs to form a consolidated body, wherein the consolidated body is a prefabricated structure, and the thickness of the plain concrete on the outer side of the hollow steel bundle is 20-50 mm. Both ends of the load-bearing steel members extend to form connecting portions, and the connecting portions extend to the outside of the consolidated body.

2. The steel-concrete composite column structure according to claim 1, characterized in that: The load-bearing steel member is any one of H-steel with equal flange width, H-steel with unequal flange width, and H-steel with transverse stiffening ribs and longitudinal stiffening ribs.

3. The steel-concrete composite column structure according to claim 1, characterized in that: The thickness of the plain concrete on the outer side of the hollow steel bundle is 25 mm.

4. The steel-concrete composite column structure according to claim 1, characterized in that: The length of the connecting portion is 300 mm to 500 mm.

5. The steel-bundle concrete composite column structure according to claim 1, characterized in that: The outer side of the hollow steel bundle is covered with an anti-cracking steel wire mesh, and the plain concrete is covered on the steel wire mesh.

6. The steel-bundle concrete composite column structure according to claim 1, characterized in that: A vertically arranged secondary casting through hole is formed inside the consolidation body, and the secondary casting through hole is located inside the hollow steel bundle.

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