A connection structure between a prefabricated wall panel and an assembled steel frame structure beam and a construction method thereof

Abstract

The present invention discloses a connection structure of a prefabricated wall panel and an assembled steel frame structure beam and a construction method thereof, comprising a steel frame, a prefabricated wall panel and a connection device. The connection device comprises a slide groove and a wall panel connection piece. The slide groove is welded to the two ends of the lower flange of the upper beam and the upper flange of the lower beam respectively, so that the wall panel connection piece slides into the slide groove to achieve rapid positioning and fixing; the wall panel connection piece is L-shaped, and the connection piece and the wall panel are bolted in the factory, and the connection piece and the frame beam are connected by double-row bolts after alignment at the construction site. The present invention is simple to construct, and the bolt connection is convenient and fast, and the construction speed is improved. It can adapt to the development of assembled steel structures and is easy to install and dismantle. The double-row bolt connection is adopted to ensure that the steel beam has a high overall stability and bearing capacity, and at the same time, the deformation coordination between the steel frame and the prefabricated wall panel is better.

Description

Technical Field

[0001] The present invention relates to the technical field of building, and in particular to a connection structure of a prefabricated wall panel and an assembled steel frame structure beam and a construction method thereof, belonging to the technical field of assembled building. Background Art

[0002] In recent years, my country has vigorously developed prefabricated buildings. Compared with cast-in-place buildings, prefabricated buildings have the advantages of high construction efficiency, green environmental protection, and reduced labor. Prefabricated buildings are mainly divided into concrete structures, wooden structures, and steel structures. Among them, prefabricated steel structures have the characteristics of light weight, less on-site wet work, recyclable materials, standardized production, factory production, and on-site assembly. It is one of the effective measures to alleviate energy shortages.

[0003] In earthquake-prone areas, higher seismic performance requirements are placed on building structures, and the connections between components must be reasonably designed, especially the safe connection between the frame structure and the enclosing walls, which is one of the key design points of the frame structure.

[0004] At present, prefabricated wall panels and frame beams usually adopt flexible connections and rigid connections. The flexible connection takes the form of connecting parts, which weakens the connection between the frame beam and the prefabricated wall panels, reduces the external force exerted on the prefabricated wall panels under the action of earthquakes and other horizontal loads, and avoids damage; the rigid connection usually takes the form of composite beams, and the prefabricated wall panels are embedded with the beams through the integral casting, which strengthens the connection between the frame beam and the prefabricated wall panels. The external force exerted on the prefabricated wall panels under the action of earthquakes and other horizontal loads increases, so the node damage is prone to occur.

[0005] Liu Xuechun et al. announced a steel structure assembled exterior wall system (application publication number: CN 105525702 A, application number: 20151080078.6), which includes a steel frame structure, a wall structure and connectors. The L-shaped connectors are fixed on the wall panels, the T-shaped connectors are welded to the L-shaped connectors on the upper part of the wall panels, the L-shaped connectors on the upper part of the wall panels are reserved with bolt holes, and the wedge-shaped steel plates are welded to the upper surface of the lower flange of the upper frame beam at a certain distance. During construction, the upper frame beam and the wall panels are positioned and connected by wedge-shaped steel plates and T-shaped connectors, and the lower frame beam and the wall panels are connected by bolts. This connection adopts a firm and effective flexible connection, but the connection components have high precision, and the prefabricated wall panels are only firmly connected to half of the flange of the frame beam, which will result in a lower overall stability of the frame beam.

[0006] Zhang Xinlong et al. published a connection structure between a precast concrete exterior wall panel and a beam of an assembled steel frame structure (Publication No.: CN 110886530 A, Application No.: 201911314023.9). This connection structure consists of a friction connection component and a load-bearing connection component, which can effectively absorb inter-story displacement and meet the technical requirements of good seismic performance, overall beauty, flatness, etc. However, this connection is not firm enough, and its effect may be affected by various external factors during actual use.

[0007] The above query results show that a simple, firm, effective, and earthquake-resistant flexible connection form requires further research and development. In view of the above problems, a new connection structure between a precast wall panel and a beam of an assembled steel frame structure and its construction method are proposed, providing a method for the safe connection between the frame structure and the enclosure wall. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a new connection structure between a precast wall panel and a beam of an assembled steel frame structure and its construction method, so as to overcome the problems of cumbersome construction and insufficient firmness of the existing connection structure, and achieve improvements in on-site operability, safety and reliability, seismic performance, etc.

[0009] The present invention adopts the following technical solutions:

[0010] A connection structure between a precast wall panel and a beam of an assembled steel frame structure is composed of a steel frame composed of steel frame columns and steel frame beams, a precast wall panel, and a connecting device connecting the steel frame and the precast wall panel. The connecting device includes a chute and a wall panel connecting piece; an L-shaped connecting piece is arranged on the precast wall panel, and a chute is arranged on the flange of the frame beam, and double-row bolt holes are reserved. The precast wall panel and the assembled steel frame beam are connected together through chute positioning and high-strength bolt fastening.

[0011] For the connection structure between a precast wall panel and a beam of an assembled steel frame structure, the chute is L-shaped or U-shaped, distributed at both ends of the lower surface of the lower flange of the upper beam and the upper surface of the upper flange of the lower beam, with a length of 1 / 4 to 1 / 3 of the width of the flange of the frame beam, and is arranged along the sliding direction of the wall panel connecting piece to facilitate the positioning of the wall panel.

[0012] For the connection structure between a precast wall panel and a beam of an assembled steel frame structure, the wall panel connecting piece is L-shaped, distributed at the upper and lower parts of the wall panel. The connecting piece and the wall panel are connected by a single row of bolts, and double-row bolt holes are reserved for the part connected to the steel beam.

[0013] For the connection structure between a precast wall panel and a beam of an assembled steel frame structure, the steel frame is composed of two parallel square steel pipe columns and upper and lower frame beams. The frame beam is an H-shaped steel beam, and double-row bolt holes are distributed on the lower flange of the upper frame beam and the upper flange of the lower frame beam, and there is a chute at each of its two ends.

[0014] The connection structure of the prefabricated wall panel and the assembled steel frame structure beam is described, and the prefabricated wall panel is an ordinary concrete wall panel, a recycled concrete wall panel, a wooden wall panel, or a bamboo wall panel.

[0015] In the connection structure of the prefabricated wall panel and the assembled steel frame structure beam, the material of the connection device is aluminum alloy or steel.

[0016] In the connection structure of the prefabricated wall panel and the assembled steel frame structure beam, a gap is left between the upper and lower L-shaped wall panel connectors and the square steel pipe columns, which are flush with the lower flanges of the upper and lower frame beams respectively.

[0017] In the connection structure of the prefabricated wall panel and the assembled steel frame structure beam, the connection between the slideway and the steel frame beam is achieved by welding; and the connection between the wall panel connector and the wall panel and the steel frame beam is achieved by bolt connection.

[0018] The construction method of the connection structure of the prefabricated wall panel and the assembled steel frame structure beam comprises the following steps:

[0019] (a) Installation of the connection device on the wall panel: Fix the wall panel connection pieces on the upper and lower parts of the wall panel, open a hole at the end connected to the frame beam, and reserve double-row bolt holes;

[0020] (b) Installation of the connection device on the frame beam: weld the slide grooves to the lower surface of the lower flange of the upper frame beam and the upper surface of the upper flange of the lower frame beam, open holes on the lower flange of the upper frame beam and the upper flange of the lower frame beam, and reserve double-row bolt holes corresponding to the positions of the double-row bolt holes on the wall panel connector;

[0021] (c) Assembly of prefabricated steel frame: assemble two parallel square steel pipe columns and upper and lower frame beams to build the frame;

[0022] (d) Alignment of prefabricated wall panels: First, lift the wall panels to a certain height so that the wall panel connectors are flush with the flanges of the upper and lower frame beams. When the two ends of the wall panel connectors correspond to the slide grooves on the frame beams, push them in horizontally to make them fit tightly.

[0023] (e) Connection between prefabricated wall panels and assembled steel frames: Use high-strength bolts with specifications of M16-M30 to pass through the holes reserved between the frame beam and the wall panel connector, and tighten the nuts to achieve the tightening effect.

[0024] Compared with the existing connection technology of prefabricated wall panels and frame beams, the advantages of the present invention are:

[0025] (1) A slide groove is set on the flange of the assembled frame beam to easily align with the wall panel, making the construction convenient and quick;

[0026] (2) Double-row bolt connection ensures that the steel beam has high overall stability and bearing capacity;

[0027] (3) The steel frame and prefabricated wall panels are connected by slide grooves and high-strength bolts, which have good deformation coordination;

[0028] (4) The flexible connection structure is easy to disassemble and replaceable, which adapts to the development of prefabricated steel structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an overall schematic diagram of the steel frame structure and the nodes on the frame beams of the present invention.

[0030] Figure 2 It is an overall schematic diagram of the recycled decorative concrete wall panel and the connecting parts of the present invention.

[0031] Figure 3 It is a partial schematic diagram of the upper connecting piece of the prefabricated wall panel of the present invention.

[0032] Figure 4 It is a partial schematic diagram of the upper flange slide groove of the frame beam of the present invention.

[0033] Explanation of the accompanying drawings: 1-square steel pipe column, 2-upper frame beam, 3-lower frame beam, 4-upper connecting piece of prefabricated wall panel, 5-double row of bolt holes on the upper frame beam, 6-double row of bolt holes on the lower frame beam, 7-slide groove on the upper frame beam, 8-slide groove on the lower frame beam, 9-bolts of the upper connecting piece of prefabricated wall panel, 10-bolts of the lower connecting piece of prefabricated wall panel, 11-lower connecting piece of prefabricated wall panel, 12-prefabricated wall panel, 13-bolt holes of the upper connecting piece of prefabricated wall panel, 14-bolt holes of the lower connecting piece of prefabricated wall panel. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0035] The connection structure of the prefabricated wall panel and the assembled steel frame beam used in Example 1 is as follows: Figure 1-4 As shown, it includes a steel frame composed of steel frame columns (1) and steel frame beams (2, 3), a prefabricated wall panel (12), and wall panel connectors (4, 11) and slide grooves (7, 8) connecting the steel frame and the prefabricated wall panel.

[0036] The slide groove is L-shaped and distributed at both ends of the lower surface of the lower flange of the upper beam and the upper surface of the upper flange of the lower beam. The length is 1 / 4 of the width of the frame beam flange and is set along the sliding direction of the wall panel connecting piece to facilitate the wall panel to be put into place; it is connected to the steel frame beam by welding.

[0037] The wall panel connector is L-shaped and distributed at the upper and lower parts of the wall panel. The connector and the wall panel are connected by a single row of bolts (9, 10), and a double row of bolt holes (13, 14) are reserved at the part connected with the steel beam.

[0038] The steel frame is composed of two parallel square steel pipe columns (1) and upper and lower frame beams (2, 3). The frame beam is an H-shaped steel beam. Double rows of bolt holes (5, 6) are distributed on the lower flange of the upper frame beam and the upper flange of the lower frame beam, and a slide groove (7, 8) is provided at each end.

[0039] The prefabricated wall panels are recycled concrete prefabricated wall panels (12).

[0040] The connecting device is made of Q235 steel.

[0041] A gap is left between the wall panel connectors (4, 11) and the square steel pipe column (1), and the upper and lower wall panel connectors are flush with the lower flanges of the upper and lower frame beams, respectively.

[0042] The construction method of the connection structure of the prefabricated wall panel and the assembled steel frame structure beam of this embodiment is:

[0043] (a) Installation of the connection device on the wall panel: Fix the wall panel connector (4, 11) to the upper and lower parts of the wall panel (12), open a hole at one end connected to the frame beam, and reserve double rows of bolt holes (13, 14);

[0044] (b) Installation of the connection device on the frame beam: Weld the slide grooves (7, 8) to the lower surface of the lower flange of the upper frame beam and the upper surface of the upper flange of the lower frame beam, and open holes on the lower flange of the upper frame beam and the upper flange of the lower frame beam to reserve double-row bolt holes (5, 6) corresponding to the positions of the double-row bolt holes on the wall panel connector;

[0045] (c) Assembling of prefabricated steel frame: assembling two parallel square steel tube columns (1) and upper and lower frame beams (2, 3) to build the frame;

[0046] (d) Alignment of prefabricated wall panels: First, raise the wall panel (12) to a certain height so that the wall panel connectors (4, 11) are flush with the upper and lower frame beam flanges, and push them horizontally when the ends of the wall panel connectors correspond to the slide grooves (7, 8) on the frame beams one by one to make them fit tightly;

[0047] (e) Connection between prefabricated wall panels and assembled steel frames: Use high-strength bolts with specifications of M16-M30 to pass through the holes reserved between the frame beam and the wall panel connector, and tighten the nuts to achieve the tightening effect.

[0048] The above implementation examples are only used to illustrate the preferred solutions of the present application and do not constitute any limitation to the protection scope of the present application. Any common changes and substitutions made by technicians in this field within the scope of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure of a prefabricated wall panel and an assembled steel frame structure beam, characterized in that: It includes a steel frame composed of steel frame columns and steel frame beams, precast wall panels, and a connecting device for connecting the steel frame and the precast wall panels. The connecting device includes a chute and a wall panel connecting member; the chute is L-shaped or U-shaped, distributed at both ends of the lower surface of the lower flange of the upper beam and the upper surface of the upper flange of the lower beam, with a length of 1 / 4 to 1 / 3 of the flange width of the frame beam, and is arranged along the sliding direction of the wall panel connecting member to facilitate the positioning of the wall panel; the wall panel connecting member is L-shaped, distributed at the upper and lower parts of the wall panel, and is connected to the wall panel by single-row bolts, and double-row bolt holes are reserved at the part connected to the steel beam; the steel frame is composed of two parallel square steel pipe columns and upper and lower frame beams. The frame beam is an H-shaped steel beam, and double-row bolt holes are distributed on the lower flange of the upper frame beam and the upper flange of the lower frame beam, and there is a chute at each of its two ends; there is a gap distance between the upper and lower L-shaped wall panel connecting members and the square steel pipe columns, and they are flush with the lower flanges of the upper and lower frame beams respectively; the connection between the chute and the steel frame beam is welded; the connection between the wall panel connecting member and the wall panel and the steel frame beam is bolted.

2. The connection structure of a prefabricated wall panel and an assembled steel frame structure beam according to claim 1, characterized in that: The precast wall panel is a normal concrete wall panel, a recycled concrete wall panel, a wooden wall panel, or a bamboo wall panel.

3. The connection structure of a prefabricated wall panel and an assembled steel frame structure beam according to claim 1 is characterized in that: The material of the connecting device is aluminum alloy or steel.

4. A construction method for the connection structure between the precast wall panel and the assembled steel frame structure beam according to any one of claims 1-3, comprising the following steps: (a) Installation of the connecting device on the wall panel: Fix the wall panel connecting member on the upper and lower parts of the wall panel, open holes at one end connected to the frame beam, and reserve double-row bolt holes; (b) Installation of the connecting device on the frame beam: Weld the chute at both ends of the lower surface of the lower flange of the upper frame beam and the upper surface of the upper flange of the lower frame beam, open holes on the lower flange of the upper frame beam and the upper flange of the lower frame beam, and reserve double-row bolt holes, corresponding to the positions of the double-row bolt holes on the wall panel connecting member; (c) Assembly of the assembled steel frame: Assemble two parallel square steel pipe columns and upper and lower frame beams to build the frame; (d) Alignment of the precast wall panel: First lift the wall panel to a certain height so that the wall panel connecting member is flush with the flanges of the upper and lower frame beams respectively, and horizontally push it in when the two ends of the wall panel connecting member correspond to the chutes on the frame beam one by one to make it fit tightly; (e) Connection between the precast wall panel and the assembled steel frame: Pass high-strength bolts with a specification of M16-M30 through the holes reserved on the frame beam and the wall panel connecting member, and tighten the nuts to achieve a fastening effect.

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