Modularized corrugated steel pipe concrete composite column-H-shaped steel beam joint and construction method thereof

Abstract

The invention discloses a modular corrugated concrete filled steel tube composite column-H-shaped steel beam joint and a construction method thereof. The modular corrugated concrete filled steel tube composite column-H-shaped steel beam joint comprises a semi-prefabricated corrugated concrete filled steel tube composite column, a modular through type cast-in-place joint and a steel beam connecting part. The semi-prefabricated corrugated steel pipe concrete composite column comprises a prefabricated composite column body shell and composite column cast-in-place inner core concrete. The modularized through type cast-in-place joint comprises a longitudinal bar connecting part, a partially-convex through partition plate and an externally-wrapped welding steel sleeve. The steel beam connecting part comprises an H-shaped steel beam, an anti-shearing plate and a plurality of high-strength bolts. The anti-shearing plate and the H-shaped steel beam are welded to the outer wrapping welding steel sleeve and the partially-convex through partition plate correspondingly, and the H-shaped steel beam is connected through the high-strength bolt; the connecting structure has the advantages of convenience in field assembly of dry-type connection and high integrity and reliability of wet-type connection, is convenient for industrial production, and meets the development requirements of the modular building industry.

Description

Technical Field

[0001] The present invention relates to the technical field of modular buildings. Specifically, it relates to a modular semi-precast corrugated steel tube concrete composite column-H steel beam connection node and its construction method. Background Art

[0002] In recent years, steel-concrete composite structures have been widely used in modern construction projects due to their high bearing capacity, excellent seismic performance, high construction efficiency and other characteristics. The modular semi-precast technology has also become a research hotspot for balancing structural performance and construction efficiency through the combination of factory prefabrication of core load-bearing components and on-site assembly construction. However, for steel-concrete composite columns, which are important seismic components of composite structures, there is a problem that the interface between the steel tube and the core concrete is prone to debonding. In view of this, while ensuring structural safety and being easy for on-site construction, a "semi-precast corrugated steel tube recycled brick aggregate concrete composite column" has emerged. It not only has the advantages of reducing on-site construction procedures and improving construction efficiency by adopting the semi-precast process, but also can improve the integrity of the precast ordinary concrete shell and the cast-in-situ inner core recycled brick aggregate concrete, and enhance the seismic performance of the current semi-precast columns.

[0003] As a type of steel-concrete composite structure, the semi-precast corrugated steel tube concrete composite column-steel beam hybrid frame structure utilizes the respective advantages of steel and concrete materials in terms of flexural or compressive strength, stiffness, ductility, etc. It is a low-cost and high-efficiency composite structure system compared with the overall cast-in-situ structure. Among them, the semi-precast corrugated steel tube concrete composite column-beam node, as the core part for transferring loads and coordinating deformations, its structural form directly affects the mechanical properties and construction feasibility of the overall structure.

[0004] Traditional connection nodes mostly adopt solutions such as full cast-in-situ concrete wrapping, pure steel structure welding, bolt connection, etc. However, there are still the following technical bottlenecks in actual projects: 1. Full cast-in-situ concrete nodes require on-site formwork support, steel bar binding and curing, with a long construction period and being restricted by environmental conditions, making it difficult to meet the requirements of industrialized construction. At the same time, concrete shrinkage and creep are prone to cause crack expansion in the node area, affecting durability; 2. Pure steel nodes rely on welding and high-strength bolt connection, with the on-site welding workload accounting for more than 60%, and the processing accuracy of components needs to be controlled within ±2mm, resulting in low economy and construction error tolerance.

[0005] However, there are still obvious deficiencies in the existing semi-precast steel tube concrete composite column-beam nodes in terms of the steel-concrete collaborative working mechanism: 1. It is difficult to position the longitudinal reinforcement of the upper and lower semi-precast composite columns in the structure, and the connection is complex; 2. The force transfer mechanism of the beam-column node is not coherent; 3. The connection structure between modular units is complex, with a low on-site installation error tolerance, reducing the on-site construction speed.

[0006] For this reason, the applicant aims to propose a modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint and its construction method to solve the above problems. It not only has high construction efficiency and high seismic performance but also good economy, further promoting the in-depth application of steel-concrete composite structures in industrial buildings. Summary of the Invention

[0007] The present invention provides a modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint and its construction method to solve the above technical problems.

[0008] The present invention is realized through the following technical solutions:

[0009] A modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint, comprising a semi-precast corrugated steel tube concrete composite column (1), a modular through-type cast-in-place joint (2), and a steel beam connection part (3).

[0010] The semi-precast corrugated steel tube concrete composite column (1) is composed of a factory precast composite column shell (4) and a cast-in-place core concrete (5) of the composite column; the modular through-type cast-in-place joint (2) realizes reliable connection to the H steel beam through the steel beam connection part (3). The modular through-type cast-in-place joint (2) is arranged between the H steel beam (9) and the semi-precast corrugated steel tube concrete composite column (1), and is connected and integrated with the core concrete (5) of the semi-precast corrugated steel tube concrete composite column by simultaneous pouring;

[0011] For the factory precast composite column shell (4), longitudinal reinforcement binding and pouring molding are completed through partial outwardly convex through diaphragms (7). The partial outwardly convex through diaphragms (7) are precast and cut in the factory, and holes are reserved according to the positions of the longitudinal reinforcements to achieve precise positioning of the longitudinal reinforcements. The corrugated steel tube and the longitudinal reinforcements are effectively anchored by welding to the through steel plate (7), which acts as a formwork when preparing the composite column shell and acts as an anchor for the corrugated steel tube and the longitudinal reinforcements when the composite column is stressed.

[0012] The center of the partial outwardly convex through diaphragm (7) is provided with a circular slot, which is convenient for the later pouring of the core (5) of the semi-precast corrugated steel tube concrete composite column and the modular through-type cast-in-place joint (2). Finally, the semi-precast corrugated steel tube concrete composite column shell (4) formed by pouring and curing in the factory is as Figure 3 shown in the upper part.

[0013] The externally wrapped welded steel sleeve (8) reserves connection holes according to the size of the partial outwardly convex through diaphragm (7). The externally wrapped welded steel sleeve is formed by welding two factory precast L-shaped steel plates.

[0014] After the semi-precast corrugated steel pipe concrete composite column shell formed by casting and curing in the factory and the precast L-shaped steel plates are hoisted to the construction site, the longitudinal reinforcement of the upper and lower composite columns is reliably connected through the longitudinal reinforcement connecting part (6) by means of sleeve extrusion connection, and is welded to the through partition - longitudinal reinforcement to form a "double-force anchoring connection", fully ensuring the reliability of the force transfer of the longitudinal reinforcement. The final connection effect is as Figure 3 shown.

[0015] Two precast L-shaped steel plates in the factory are welded to form an outer-wrapped welded steel sleeve (8) and wrapped outside the cast-in-place beam-column joint. It can not only provide a good constraint effect for the modular through-type cast-in-place joint, but also serve as a formwork for joint pouring and does not need to be removed after on-site pouring.

[0016] The modular through-type cast-in-place joint (2) realizes reliable connection to the H-shaped steel beam through the steel beam connecting part (3). The steel beam connecting part (3) includes: an H-shaped steel beam (9), a shear plate (10) and a number of high-strength bolts (11). Bolt holes are reserved at the web of the H-shaped steel beam (9) and the shear plate (10) according to the number and size of high-strength bolts required by the project actual situation, and are welded to the surface of the outer-wrapped welded steel sleeve (8) and the protrusions of part of the outward convex through partition (7) respectively, and the connection to the H-shaped steel beam (9) is realized through high-strength bolts. After the steel beam connection is preferably completed, it can not only form a stable force system during the construction process, bear various loads during the construction process to a certain extent, improve the construction efficiency, but also provide stable support and positioning for the subsequent joint pouring.

[0017] After the above connections are completed at the construction site, the modular through-type cast-in-place joint (2) is finally connected into one body by pouring simultaneously with the inner core concrete (5) of the semi-precast corrugated steel pipe concrete composite column. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required in the description of the implementation examples or the prior art.

[0019] Figure 1 is the axonometric schematic diagram of the semi-precast corrugated steel pipe concrete composite column in the present invention.

[0020] Figure 2 is the plan schematic diagram of the partially outward convex through partition in the present invention.

[0021] Figure 3 is the axonometric schematic diagram of the longitudinal reinforcement connection in the construction method of the modular semi-precast corrugated steel pipe concrete composite column - H-shaped steel beam connection joint in the present invention.

[0022] Figure 4It is an axonometric schematic diagram of the connection of the outsourcing welded steel sleeve in the construction method of the modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint in the present invention.

[0023] Figure 5 It is an axonometric schematic diagram of the connection between the joint and the H steel beam in the construction method of the modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint in the present invention.

[0024] Figure 6 It is an axonometric schematic diagram of the completed effect of the construction of a modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint in the present invention. Detailed implementation manners

[0025] The present invention will be further described below in conjunction with the accompanying drawings of the specification. In the following embodiments, many details are described to enable the patent of the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods.

[0026] Embodiment 1:

[0027] As Figures 1 to 6 shown, the present invention provides a modular semi-precast corrugated steel tube concrete composite column-H steel beam connection joint, including a semi-precast corrugated steel tube concrete composite column (1), a modular through-type cast-in-place joint (2), and a steel beam connection part (3).

[0028] In this embodiment, the semi-precast corrugated steel tube concrete composite column (1) is composed of a factory-precast composite column shell (4) and a cast-in-place core concrete of the composite column (5); the modular through-type cast-in-place joint (2) realizes reliable connection to the H steel beam through the steel beam connection part (3). The modular through-type cast-in-place joint (2) is arranged between the H steel beam (9) and the semi-precast corrugated steel tube concrete composite column (1), and is connected into one body by pouring simultaneously with the core of the semi-precast corrugated steel tube concrete composite column (5).

[0029] For the factory-precast corrugated steel tube concrete composite column shell (4), the longitudinal reinforcement positioning and binding are completed through partially outwardly protruding through diaphragms (7). The partially outwardly protruding through diaphragms (7) are prefabricated and cut into shape in the factory, and holes are reserved according to the position of the longitudinal reinforcement. The precise positioning of the longitudinal reinforcement is realized during the prefabrication process of the composite column shell, and the corrugated steel tube and the longitudinal reinforcement are welded to the through steel plate (7) by welding. The composite column shell acts as a formwork during the preparation of the composite column shell and acts as an anchor for the corrugated steel tube and the longitudinal reinforcement when the composite column is stressed.

[0030] A circular slot is provided at the center of the partially protruding through-diaphragm (7), which is convenient for the later casting of the inner core (5) of the semi-precast corrugated steel tube concrete composite column and the modular through-cast joint (2). Finally, the shell (4) of the semi-precast corrugated steel tube concrete composite column formed by casting and curing in the factory.

[0031] The externally wrapped welded steel sleeve (8) reserves connection holes according to the size of the partially protruding through-diaphragm (7). The externally wrapped welded steel sleeve is formed by welding two factory-precast L-shaped steel plates. The dimensions of the above steel pipes and steel plates should be selected according to the actual engineering and construction requirements.

[0032] After the shell of the semi-precast corrugated steel tube concrete composite column formed by casting and curing in the factory and the precast L-shaped steel plates are hoisted to the construction site. The longitudinal bars of the upper and lower composite columns are reliably connected through the longitudinal bar connection part (6) by means of sleeve extrusion connection, and are welded to the through-diaphragm - longitudinal bar to form a "double-force anchoring connection", which fully guarantees the reliability of the longitudinal bar force transmission.

[0033] Two factory-precast L-shaped steel plates are embedded outside the partially protruding through-diaphragm according to the hole-opening positions, and a welded steel sleeve (8) is formed by welding to wrap the cast-in-place beam-column joint. It can not only provide a good restraint effect for the modular through-cast joint, but also serve as a joint casting formwork and does not need to be removed after on-site casting.

[0034] The modular through-cast joint (2) realizes reliable connection to the H-shaped steel beam through the steel beam connection part (3). The steel beam connection part (3) includes: H-shaped steel beam (9), shear-resistant plate (10) and several high-strength bolts (11). Bolt holes are reserved at the web of the H-shaped steel beam (9) according to the number of high-strength bolts required by the actual project for the shear-resistant plate (10), and are welded to the surface of the externally wrapped welded steel sleeve (8) and the protrusion of the partially protruding through-diaphragm (7) respectively, and the H-shaped steel beam (9) is connected through high-strength bolts. The aperture ratio of the reserved bolt holes should be 1 to 2 mm larger than the diameter of the connecting bolts; after the steel beam connection is preferably completed, not only can the structure form a stable force system during the construction process, bear various loads during the construction process to a certain extent, improve the construction efficiency, but also provide stable support and positioning for the subsequent joint casting. The above steel can be selected according to the actual project with appropriate strength.

[0035] After the above connections are completed at the construction site, the modular through-cast joint (2) is finally connected integrally by casting simultaneously with the inner core (5) of the semi-precast corrugated steel tube concrete composite column.

[0036] A modular semi-precast corrugated steel tube concrete composite column - H-shaped steel beam connection joint proposed in this embodiment has the following construction process:

[0037] Step 1: Prefabricate and cut the partially outward-convex through partition board (7) according to the actual column dimensions in the project at the factory. A circular hole is preset in the center of the steel plate for subsequent pouring, and connection holes are preset according to the positions of the longitudinal bars.

[0038] Step 2: Preset bolt holes at the web of the shear plate (10) and the H-shaped steel beam (9) according to the number and dimensions of high-strength bolts required in the project at the factory.

[0039] Step 3: Preset connection holes in the prefabricated L-shaped steel plate at the factory according to the dimensions of the partially outward-convex through partition board (7).

[0040] Step 4: Position and bind the longitudinal bars of the prefabricated corrugated steel tube concrete composite column shell at the factory through the partially outward-convex through partition board (7). On this basis, weld the corrugated steel tube and the longitudinal bars to the through steel plate (7) by welding to achieve effective anchoring, and finally pour the concrete of the semi-prefabricated composite column shell.

[0041] Step 5: Lift the semi-prefabricated corrugated steel tube concrete composite column shell (1), shear plate (10), H-shaped steel beam (9) and prefabricated L-shaped steel plate cured at the factory to the construction site.

[0042] Step 6: Connect the longitudinal bars in the upper and lower semi-prefabricated corrugated steel tube concrete composite column shells (1) prefabricated at the factory by sleeve extrusion.

[0043] Step 7: Embed two prefabricated L-shaped steel plates at the factory outside the partially outward-convex through partition board according to the opening positions, and form an outer-wrapped welded steel sleeve (8) by welding to wrap the cast-in-place beam-column joint.

[0044] Step 8: Weld the shear plate (10) and the H-shaped steel beam (9) to the surface of the outer-wrapped welded steel sleeve (8) and the protrusion of the partially outward-convex through partition board (7) respectively, and connect the H-shaped steel beam (9) and the shear plate (10) at the web of the H-shaped steel beam through high-strength bolts (11).

[0045] Step 9: Simultaneously pour the modular through-type cast-in-place joint (2) and the inner cores (5) of the upper and lower semi-prefabricated corrugated steel tube concrete composite columns to finally connect them into one body.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Modular corrugated steel tube concrete composite column-H steel beam joint, characterized in that: It includes semi-precast corrugated steel tube concrete composite columns, modular through-type cast-in-place joints, and steel beam connection parts; The semi-precast corrugated steel tube concrete composite column is composed of a factory precast composite column body shell and a cast-in-place inner core concrete of the composite column; the modular through-type cast-in-place joint realizes reliable connection to the H-shaped steel beam through the steel beam connection part; the modular through-type cast-in-place joint is arranged between the H-shaped steel beam and the semi-precast corrugated steel tube concrete composite column, and is connected into one body by casting simultaneously with the cast-in-place inner core concrete of the upper and lower semi-precast corrugated steel tube concrete composite columns.

2. The modular corrugated steel pipe concrete composite column-H steel beam joint according to claim 1, wherein: The modular through-type cast-in-place joint includes: a partially convex through partition, a longitudinal bar connection part, and an outer wrapped welded steel sleeve; the partially convex through partition is prefabricated and cut into shape in the factory, holes are reserved according to the position of the longitudinal bars, and precise positioning of the longitudinal bars is realized during the prefabrication process of the composite column body shell; a circular slot is provided in the center of the partially convex through partition to facilitate the later casting of the cast-in-place inner core concrete of the semi-precast corrugated steel tube concrete composite column and the modular through-type cast-in-place joint; the corrugated steel tube and the longitudinal bars are welded to the through steel plate by welding, which plays a role of formwork during the preparation of the composite column body shell and plays a role of anchoring the corrugated steel tube and the longitudinal bars when the composite column body is stressed.

3. The modular corrugated steel tube concrete composite column-H steel beam joint according to claim 1 or 2, characterized in that: The longitudinal bars of the upper and lower composite columns are connected through the longitudinal bar connection part; the longitudinal bar connection part realizes reliable connection of the longitudinal bars through the double connection methods of sleeve extrusion connection and through partition welding.

4. The modular corrugated steel tube concrete composite column-H steel beam joint according to claim 1 or 2, characterized in that: The outer wrapped welded steel sleeve reserves connection holes according to the size of the partially convex through partition and wraps the outside of the cast-in-place beam-column joint; the outer wrapped welded steel sleeve is formed by welding two factory precast L-shaped steel plates at the construction site; the factory precast L-shaped steel plates are pre-opened with connection holes according to the size of the partially convex through partition; it provides restraint for the modular through-type cast-in-place joint and serves as a joint casting formwork, and does not need to be removed after on-site casting.

5. The modular corrugated steel tube concrete composite column-H steel beam joint according to claim 1, characterized in that: The modular through-type cast-in-place joint realizes reliable connection to the H-shaped steel beam through the steel beam connection part; the steel beam connection part includes: an H-shaped steel beam, a shear-resistant plate, and a number of high-strength bolts; bolt holes are preset in the factory at the web of the shear-resistant plate (10) and the H-shaped steel beam (9) according to the size and quantity of the high-strength bolts required by the project; the shear-resistant plate and the H-shaped steel beam are respectively welded to the outer wrapped welded steel sleeve and the partially convex through partition, and the connection to the H-shaped steel beam is realized through high-strength bolts.

6. The modular corrugated steel tube concrete composite column-H steel beam joint according to claim 1, 2 or 4, characterized in that: The modular through-type cast-in-place joint is connected into one body by casting simultaneously with the inner core concrete of the semi-precast corrugated steel tube concrete composite column.

7. A construction method for implementing the modular corrugated steel pipe concrete composite column-H steel beam joint described in any one of claims 1-6, characterized in that: This construction method includes the following steps. Step 1: Cut and prefabricate the partially convex through partition (7) into shape in the factory according to the actual column body size in the project, preset a circular hole in the center of the steel plate for easy subsequent casting, and preset connection holes according to the position of the longitudinal bars; Step 2: Preset bolt holes in the factory at the web of the shear-resistant plate (10) and the H-shaped steel beam (9) according to the quantity and size of the high-strength bolts required by the project; Step 3: Pre-open connection holes on the factory precast L-shaped steel plates according to the size of the partially convex through partition (7); Step 4: Position and tie the longitudinal bars of the prefabricated corrugated steel tube concrete composite column shell in the factory through the partially outwardly protruding through diaphragm (7); on this basis, weld the corrugated steel tube and the longitudinal bars to the through steel plate (7) by welding to achieve effective anchoring, and finally pour the concrete of the semi-prefabricated composite column shell; Step 5: Lift the semi-prefabricated corrugated steel tube concrete composite column shell (1), shear plate (10), H-shaped steel beam (9) and prefabricated L-shaped steel plate cured and formed by pouring in the factory to the construction site; Step 6: Connect the longitudinal bars in the semi-prefabricated corrugated steel tube concrete composite column shells (1) prefabricated in the factory for the upper and lower layers by sleeve extrusion connection; Step 7: Embed the two prefabricated L-shaped steel plates in the factory according to the opening positions outside the partially outwardly protruding through diaphragm, and form an outer-wrapped welded steel sleeve (8) by welding to wrap the cast-in-place beam-column joint; Step 8: Weld the shear plate (10) and the H-shaped steel beam (9) to the surface of the outer-wrapped welded steel sleeve (8) and the protrusion of the partially outwardly protruding through diaphragm (7) respectively, and connect the H-shaped steel beam (9) and the shear plate (10) at the web of the H-shaped steel beam by high-strength bolts (11); Step 9: Simultaneously pour the modular through-type cast-in-place joint (2) and the inner cores (5) of the upper and lower semi-prefabricated corrugated steel tube concrete composite columns and finally connect them into one body.

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