A cold-formed steel wall-arch hybrid structure system and assembly method

Abstract

The present invention discloses a cold-formed steel wall-arch hybrid structure system and an assembly method. The structure system includes several assembled composite wall elements and floor slabs. The composite wall element includes a column, an arch support, a composite wall and an I-beam. The column is arranged at the left and right ends of the composite wall; the I-beam is arranged at the upper and lower ends of the composite wall, and its two ends are respectively connected to the column; the arch support is arranged inside the steel frame of the composite wall, and its two ends are respectively connected to the diagonal points where the column and the I-beam are connected, and the arch supports arranged inside the adjacent four composite wall elements form a circle; the columns of adjacent layers are fixedly connected, the columns, the arch support and the I-beam are connected by a first connection node, the columns and the I-beam are connected by a second connection node, and the floor slab is arranged between adjacent layers. After the arch support in the present invention and the composite wall work in synergy, the lateral resistance and vertical stability of the overall structure can be significantly improved. In addition, each component in the present invention can be prefabricated in the factory, and it is easy to assemble on site.

Description

Technical Field

[0001] The invention relates to the field of building engineering structures, and in particular to an assembly method of a cold-formed steel wall-arch hybrid structural system. Background Art

[0002] In the existing cold-formed steel structure, the composite wall formed by the cold-formed thin-walled steel frame and the wall panels connected by self-tapping screws is the main load-bearing and lateral-resisting member of the structure. Under the action of horizontal load, the incompatibility between the cold-formed thin-walled steel frame and the wall panels causes relative rotation between the two. The screw connectors located at the periphery of the composite wall first suffer shear failure and gradually extend to the screw connection parts in the middle of the composite wall. After most of the screw connectors fail, the skin effect between the cold-formed thin-walled steel frame and the wall panels is lost, causing the cold-formed steel structure to lose its only anti-seismic defense line, and the structure collapses partially or as a whole.

[0003] The existing cold-formed thin-walled steel composite wall technology often uses cross bracing to make up for the above shortcomings, but the cross bracing has complex end connections and is prone to local damage under tension. The cross bracing is also prone to loosening after repeated deformation, which seriously affects its contribution to the shear resistance of the cold-formed thin-walled steel composite wall. In addition, the existing cold-formed thin-walled steel composite wall technology has strict requirements on the compression, shear, and overturning resistance of the wall side columns, while the thin-walled double-jointed C-shaped side columns and the steel tube concrete strong side columns will face technical difficulties such as compressive buckling or insufficient anchoring capacity of the side columns due to loosening of the anti-pullout anchor bolts. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a cold-formed steel wall-arch hybrid structure system, which can change the force transmission mechanism of the existing cold-formed steel structure system, increase the seismic defense line in addition to the combined wall, improve the stress conditions of the combined wall side columns in the existing cold-formed steel structure system, and significantly improve the seismic performance of the cold-formed steel structure. At the same time, an assembly method of a new cold-formed steel wall-arch hybrid structure system is also provided, and the assembly method is simple.

[0005] Technical solution: A cold-formed steel wall-arch hybrid structure system of the present invention includes a number of assembled composite wall elements and floor slabs, wherein the composite wall elements include columns, arch supports, composite walls and I-beams, wherein the columns are arranged at the left and right ends of the composite wall; the I-beams are arranged at the upper and lower ends of the composite wall, and the two ends of the I-beams are respectively connected to the columns; the arch supports are arranged inside the steel frame of the composite wall, and the two ends thereof are respectively connected to the diagonal points where the columns and the I-beams are connected, and the arch supports arranged inside four adjacent composite wall elements form a circle; the columns of adjacent layers are fixedly connected, the columns, arch supports and I-beams are connected by a first connection node, the columns and the I-beams are connected by a second connection node, and the floor slabs are arranged between adjacent layers.

[0006] Preferably, the column includes embedded steel members, cold-bent thick-walled steel pipes, self-compacting concrete and embedded bolts. The embedded steel members are arranged inside the cold-bent thick-walled steel pipes, and the middle part of the cold-bent thick-walled steel pipes is filled with self-compacting concrete. At the same time, the middle part of the embedded steel members is buried in the self-compacting concrete, and multiple groups of embedded bolts are horizontally arranged in the self-compacting concrete, and both ends of the embedded bolts extend out of the side walls of the cold-bent thick-walled steel pipes; the cold-bent thick-walled steel pipe at one end of the column that is not connected to the arch support is grooved; reserved bolt holes are provided at both ends of the embedded steel members and the cold-bent thick-walled steel pipes.

[0007] Preferably, adjacent columns at the first connection node are connected by wooden planks, both ends of the wooden planks are respectively inserted into the ends of the cold-bent thick-walled steel pipes of adjacent columns, and tension bolts are used to fix the adjacent columns to the wooden planks respectively;

[0008] The adjacent columns at the second connection node are connected by wooden planks and plug plates. The two ends of the wooden planks are respectively inserted into the ends of the cold-bent thick-walled steel pipes of the adjacent columns, and the adjacent columns are fixedly connected to the wooden planks by tension bolts.

[0009] Preferably, the arch support includes a steel joint, a cold-bent thick-walled round steel pipe and concrete. The interior of the cold-bent thick-walled round steel pipe is filled with concrete, and steel joints are provided at both ends; the steel joint includes a round steel pipe, a sealing plate and a steel plate. A sealing plate is provided at one end of the round steel pipe, and two steel plates are arranged in parallel with a gap therebetween, and one end of each is fixedly connected to the sealing plate and the round steel pipe; bolt holes are reserved at both ends of the cold-bent thick-walled round steel pipe, the round steel pipe and the steel plate, and the end of the cold-bent thick-walled round steel pipe is inserted into the round steel pipe and connected into a whole by tension bolts.

[0010] Preferably, the combined wall includes a cold-bent thin-walled steel frame, wall panels, an insulation layer and prefabricated panel units; the cold-bent thin-walled steel frame includes several groups of cold-bent thin-walled steel pipes and several X-shaped steel sheets; the prefabricated panel units are arranged in pairs on both sides of the arch support, and a cold-bent thin-walled steel pipe is arranged at both ends of each prefabricated panel unit, and the corresponding cold-bent thin-walled steel pipes at both ends of each pair of prefabricated panel units are fixedly connected by several X-shaped steel sheets. There are at least two pairs of prefabricated panel units, and the insulation layer and the wall panels are arranged between adjacent prefabricated panel units, and the insulation layer is located between the wall panels on both sides.

[0011] Preferably, the combined wall is connected to the column and the I-beam by cold-bent angle steels and bolts; a pair of cold-bent angle steels are symmetrically arranged on the side wall where the column is connected to the combined wall, located on both sides of the arch support; a pair of cold-bent angle steels are symmetrically arranged on the flange where the I-beam is connected to the combined wall, located on both sides of the arch support; the combined wall is embedded in the eight cold-bent angle steels on the left and right columns and the upper and lower I-beams, and is fixedly connected to the columns and the I-beams by bolts.

[0012] Preferably, the first connection node includes a first node plate and a connecting plate, the first node plate is embedded in the web of one end of the I-beam in pairs, is fixedly connected to the I-beam, and is fixedly connected to the side wall of the column through tension bolts; the steel joint at the end of the arch support is fixedly connected to the first node plate through a connecting plate arranged in pairs, and then is fixedly connected to the column and the I-beam.

[0013] Preferably, the second connection node includes a second node plate and an insert plate, the second node plate is embedded in pairs in the web of one end of the I-beam, the insert plate is inserted into the cold-bent thick-walled steel pipe groove of the column, and both ends of the insert plate are embedded between the upper and lower flanges of the I-beam and are located between the second node plate and the web of the I-beam.

[0014] Preferably, the floor slab is embedded in the web of the top I-beam of the composite wall element and is fixedly connected to the web and lower flange of the I-beam by bolts.

[0015] The present invention provides a method for assembling a cold-formed steel wall-arch hybrid structure system, comprising the following steps:

[0016] S1. Assemble adjacent layer columns, arch supports and I-beams;

[0017] S11, inserting the wooden planks and the plugboards into the tops of the lower columns, installing the upper columns just above the lower columns, and fixing the lower columns and the upper columns together through the wooden planks and the plugboards;

[0018] Only the connection between the column and the I-beam does not require the installation of the plug plate;

[0019] S12, after the I-beam is set at the target position, the first node plate and the second node plate are respectively embedded in pairs into the web plates at both ends of the I-beam, and fixedly connected with the column side walls;

[0020] S13, fixing the two ends of the arch support to the first node plate through pairs of connecting plates respectively;

[0021] S2, assembling the lower composite wall and floor;

[0022] S21. On the side wall where the lower column is connected to the combined wall, on both sides of the arch support, a pair of cold-bent angle steels are symmetrically arranged; on the upper flange of the bottom I-beam, on both sides of the arch support, a pair of cold-bent angle steels are symmetrically arranged;

[0023] S22, inserting the side unit into the cold-bent angle steel connected to the upper flange of the bottom I-beam, sliding the side unit to the lower column along the direction of the cold-bent angle steel and close to the side wall of the lower column, and fixing the side unit to the lower column, the bottom I-beam and the cold-bent angle steel connected thereto;

[0024] S23, fixing and connecting two parallel cold-bent thin-walled steel pipes by means of an X-shaped steel sheet;

[0025] S24, install the cold-bent thin-walled steel pipe and the intermediate unit according to the designed spacing, and use the same method as step S23 to fix the X-shaped steel sheet and the cold-bent thin-walled steel pipe;

[0026] S25, after embedding the insulation layer between the side unit and the middle unit and between adjacent middle units, install the wall panels on both sides, and fix and connect the wall panels, the cold-bent thin-walled steel pipes and the cold-bent angle steel of the upper flange of the bottom I-beam;

[0027] S26, firstly, one leg of the cold-bent angle steel is fixedly connected to the lower flange of the top I-beam, and then the other leg of the cold-bent angle steel is fixedly connected to the top of the wall panel;

[0028] S27, embedding the floor slab into the web of the top I-beam, and fixedly connecting the floor slab with the web and lower flange of the top I-beam;

[0029] S3, assembling the upper composite wall;

[0030] S31, using the same method as in S2, arrange the cold-bent angle steels in pairs on both sides of the arch support, and fix the cold-bent angle steels arranged along the upper column to the side wall of the upper column;

[0031] S32, then, installing a pair of cold-bent angle steels on the upper flange of the top I-beam, and fixing and connecting the floor slab, the upper flange of the top I-beam and the cold-bent angle steels;

[0032] S33, using the same method as steps S22 to S26 to complete the assembly of the upper composite wall.

[0033] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are:

[0034] (1) The present invention designs a combined wall-arch synergistic force-bearing structure system, which changes the existing cold-formed steel structure system that only relies on the single shear resistance of the combined wall, increases the seismic defense line of the cold-formed steel structure system, and can significantly improve the seismic performance of such structures;

[0035] (2) The arch support in the present invention converts the lateral load applied to the cold-formed steel structure into column axial forces that can offset each other, reducing the shear and compression requirements of the side columns, improving the stress conditions of the side columns of the combined wall in the existing cold-formed steel structure system, and improving the vertical stability of the overall structure;

[0036] (3) The node plate in the present invention can replace the anti-pullout parts and anti-pullout anchor bolts in the existing cold-formed steel structure system, solving the technical problem of insufficient anchoring capacity of the side columns of the composite wall due to the loosening of the anti-pullout anchor bolts under repeated loads, and improving the anti-overturning capacity of such structures.

[0037] (4) Each component of the combined wall-arch cooperative force-bearing structure system designed by the present invention can be prefabricated in the factory, and the on-site assembly is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a novel cold-formed steel wall-arch hybrid structural system in the present invention;

[0039] Figure 2 It is a schematic structural diagram of the middle column of the present invention;

[0040] Figure 3 It is a structural schematic diagram of the arch support in the present invention;

[0041] Figure 4 is a structural schematic diagram of the first node plate in the present invention;

[0042] Figure 5 is a structural schematic diagram of the second node plate in the present invention;

[0043] Figure 6 It is a schematic diagram of the structure of the connecting pieces arranged in pairs in the present invention;

[0044] Figure 7 It is the structure and assembly flow chart of the combined wall in the present invention;

[0045] Figure 8 It is an assembly flow chart of the support-I-beam-column connection node in the present invention;

[0046] Fig. 9 It is an assembly flow chart of the I-beam-column connection node in the present invention;

[0047] Fig.10 It is an assembly flow chart of the center column, arch support and combined wall of the present invention;

[0048] Fig.11 It is a schematic diagram of the connection between the cold-formed steel composite floor and the top I-beam.

[0049] In the figure: column 1, lower column 1a, upper column 1b, steel member 1-1, steel pipe without slot at the end 1-2a, steel pipe with slot at the end 1-2b, self-compacting concrete 1-3, embedded bolts 1-4, reserved bolt holes 1-5, arch support 2, steel joint 2-1, round steel pipe 2-1a, cover plate 2-1b, steel plate 2-1c, reserved bolt holes 2-1d, cold-bent thick-walled round steel pipe 2-2, inner filling concrete 2-3, combined wall 3, cold-bent thin-walled steel pipe 3-1a, X-shaped steel sheet 3-1b, wall panel 3-2 , insulation layer 3-3, self-tapping screws 3-4, side unit 3-5a, middle unit 3-5b, I-beam 4, bottom I-beam 4a, top I-beam 4b, node 5, support-I-beam-column connection node 5-1, I-beam-column connection node 5-2, floor 6, cold-bent angle steel 7-1, wooden square 7-2, first node plate 7-3a, second node plate 7-3b, plug plate 7-3c, connecting plate 7-4, ordinary bolts 7-5a, tension bolts 7-5b, reserved bolt holes 7-6. DETAILED DESCRIPTION

[0050] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] like Figures 1 to 11 As shown, a novel cold-formed steel wall-arch hybrid structure system of the present invention comprises a plurality of assembled composite wall elements and a floor slab 6, wherein the composite wall element comprises a column 1, an arch support 2, a composite wall 3 and an I-beam 4, wherein the column 1 is a cold-formed thick-walled rectangular steel tube concrete with a pre-embedded steel member 1-1, and is arranged at the left and right ends of the composite wall 3; the I-beam 4 is arranged at the upper and lower ends of the composite wall 3, and the two ends of the I-beam 4 are respectively connected to the column 1; the arch support 2 is a cold-formed thick-walled circular steel tube concrete with steel joints 2-1 at both ends, and is arranged at the steel skeleton 3-1 of the composite wall 3. 1, and its two ends are connected to the diagonal points where the column 1 and the I-beam 4 are connected through steel joints 2-1 respectively. The arch supports 2 arranged inside the adjacent four composite wall elements form a circle; the columns 1 of adjacent layers are fixedly connected, and the columns 1 and the I-beam 4 are fixedly connected through nodes 5. The floor slab 6 is a cold-formed steel composite floor slab, which is arranged between adjacent layers and embedded in the web of the top I-beam 4b. The floor slab 6 is fixedly connected to the web and the lower flange of the top I-beam 4b through ordinary bolts 7-5a; and the various structural members are connected through connecting accessories.

[0052] Preferably, the I-beam 4 can be directly made of hot-rolled I-steel or an I-section formed by connecting the support rails in the adjacent cold-bent thin-walled steel composite floor 6 through bolts 7-5; bolt holes are reserved in the flanges and webs of the I-beam 4.

[0053] like Figure 2As shown, the column 1 includes an embedded steel member 1-1, a cold-bent thick-walled steel pipe 1-2, a self-compacting concrete 1-3 and embedded bolts 1-4; the embedded steel member 1-1 is arranged inside the cold-bent thick-walled steel pipe 1-2, the middle part of the cold-bent thick-walled steel pipe 1-2 is filled with the self-compacting concrete 1-3, and the middle part of the embedded steel member 1-1 is buried in the self-compacting concrete 1-3, a plurality of groups of embedded bolts 1-4 are horizontally arranged in the self-compacting concrete 1-3, and both ends of the embedded bolts 1-4 extend out of the side wall of the cold-bent thick-walled steel pipe 1-2; the cold-bent thick-walled steel pipe 1-2 is divided into two types: a steel pipe 1-2a without slots at the end and a steel pipe 1-2b with slots at the end, as shown in FIG. Figure 2 As shown in (a) and (b), they are respectively used for the arch support-I-beam-column connection node (i.e., the first connection node 5-1) and the I-beam-column connection node (i.e., the second connection node 5-2); the embedded steel member 1-1 and the cold-bent thick-walled steel pipe 1-2 are both provided with bolt holes 1-5.

[0054] Preferably, the groove depth of the end grooved steel pipe 1-2b is half the width of the plug plate 7-3c, and the groove width is not less than 10mm; the embedded steel member 1-1 includes but is not limited to hot-rolled angle steel and T-shaped steel, and the thickness is not less than 6mm.

[0055] like Figure 3 As shown, the arch support 2 includes a steel joint 2-1, a cold-bent thick-walled round steel pipe 2-2 and an inner concrete filling 2-3; the cold-bent thick-walled round steel pipe 2-2 is filled with concrete 2-3, and steel joints 2-1 are provided at both ends; the steel joint 2-1 is formed by welding a round steel pipe 2-1a, a sealing plate 2-1b and a steel plate 2-1c, a sealing plate 2-1b is provided at one end of the round steel pipe 2-1a, and the two steel plates 2-1c are arranged in parallel with a gap therebetween, and one end of each is fixedly connected to the sealing plate 2-1b and the round steel pipe 2-1a; bolt holes 2-1d are reserved at both ends of the cold-bent thick-walled round steel pipe 2-2, the round steel pipe 2-1a and the steel plate 2-1c; the end of the cold-bent thick-walled round steel pipe 2-2 is inserted into the round steel pipe 2-1a and connected into a whole through tension bolts 7-5b.

[0056] The arch support in the present invention can serve as the first line of seismic defense for the cold-formed steel structure, and after cooperating with the combined wall, it can effectively convert the lateral load applied to the cold-formed steel structure into column axial forces that can offset each other, avoiding the premature weakening of the skin effect of the combined wall due to the failure of the corner screw connection, thereby significantly improving the lateral resistance and vertical stability of the overall structure.

[0057] like Figures 3 to 10As shown, the connection accessory 7 includes a cold-bent angle steel 7-1, a timber 7-2, a node plate 7-3, a connecting piece 7-4 and a bolt 7-5. Among them, the node plate 7-3 includes a first node plate 7-3a, a second node plate 7-3b and a plug plate 7-3c; the bolt 7-5 includes a common bolt 7-5a and a tension bolt 7-5b; the first node plate 7-3a and the second node plate 7-3b are both welded integral components; the cold-bent angle steel 7-1, the timber 7-2, the node plate 7-3 and the connecting piece 7-4 are all provided with bolt holes 7-6.

[0058] Among them, the first connection node 5-1 includes a first node plate 7-3a and a connecting piece 7-4. The first node plate 7-3a is embedded in the web of one end of the I-beam 4 in pairs, fixedly connected to the I-beam 4, and fixedly connected to the side wall of the column 1 through tension bolts 7-5b; the steel joint 2-1 at the end of the arch support 2 is fixedly connected to the first node plate 7-3a through a connecting piece 7-4 arranged in pairs, and then fixedly connected to the column 1 and the I-beam 4; the adjacent layer columns 1 at the first connection node 5-1 are connected by a wooden beam 7-2, and the two ends of the wooden beam 7-2 are respectively inserted into the ends of the cold-bent thick-walled steel pipe 1-2 of the adjacent layer columns 1, and the adjacent layer columns 1 are respectively fixedly connected to the wooden beam 7-2 by tension bolts 7-5b.

[0059] The second connection node 5-2 includes a second node plate 7-3b and a plug plate 7-3c. The plug plate 7-3c is inserted into the slot of the cold-bent thick-walled steel pipe 1-2 of the column 1. The second node plate 7-3b is embedded in the web at one end of the I-beam 4 in pairs, and both ends of the plug plate 7-3c are embedded between the upper and lower flanges of the I-beam 4 and are located between the second node plate 7-3b and the web of the I-beam 4; and the bolts are sequentially passed through the bolt holes of the second node plate 7-3b (located on the vertical plate on the side of the column), the web of the I-beam, the plug plate 7-3c and the second node on the other side. Point plate 7-3b of the vertical plate, and then fix the connection; finally, the bolts are passed through the reserved holes 1-5 of the column 1 and the reserved holes of the end plate (parallel to the side of the column) of the second node plate 7-3b in turn and fixedly connected to complete the connection between the column 1 and the I-beam 4; the adjacent layer columns 1 at the second connection node 5-2 are connected by wooden squares 7-2 and plug-in plates 7-3c, and the two ends of the wooden squares 7-2 are respectively inserted into the ends of the cold-bent thick-walled steel pipes 1-2 of the adjacent layer columns 1, and the adjacent layer columns 1 are fixedly connected to the wooden squares 7-2 by tension bolts 7-5b.

[0060] Preferably, the thickness of the steel plate used for the first node plate 7-3a and the second node plate 7-3b is not less than 4 mm, and the thickness of the insert plate 7-3c is not less than 10 mm; the diameters of the ordinary bolts 7-5a and the tension bolts 7-5b are not less than 10 mm; the connecting plates 7-4 are arranged in pairs, and the thickness of the steel plates used is not less than 4 mm.

[0061] like Figure 7As shown, the combined wall 3 includes a cold-bent thin-walled steel skeleton 3-1, a wall panel 3-2, an insulation layer 3-3 and a prefabricated panel unit 3-5; the cold-bent thin-walled steel skeleton 3-1 includes a plurality of groups of cold-bent thin-walled steel pipes 3-1a and X-shaped steel sheets 3-1b; the prefabricated panel units 3-5 are arranged in pairs on both sides of the arch support, and a cold-bent thin-walled steel pipe 3-1a is arranged at both ends of each prefabricated panel unit 3-5, and the cold-bent thin-walled steel pipes 3-1a corresponding to the two ends of each pair of prefabricated panel units 3-5 are fixedly connected by a plurality of X-shaped steel sheets 3-1b (that is, the X-shaped steel sheets 3-1b connect the cold-bent thin-walled steel pipes 3-1a arranged in pairs on both sides of the arch support together), and the wall panel 3-2 is arranged on the cold-bent thin-walled steel The outer side of the pipe 3-1a is connected to the whole by self-tapping screws 3-4; the insulation layer 3-3 is arranged in the cavity formed by the wall panels 3-2 on both sides; the prefabricated panel unit 3-5 is composed of a cold-bent thin-walled steel frame 3-1, a wall panel 3-2, an insulation layer 3-3 and self-tapping screws 3-4, and the prefabricated panel unit 3-5 includes a side unit 3-5a and a middle unit 3-5b, the side unit 3-5a and the middle unit 3-5b have the same structure, the middle unit 3-5b is arranged between two side units 3-5a, the insulation layer 3-3 and the wall panel 3-2 are arranged between the side unit 3-5a and the middle unit 3-5b and between adjacent middle units 3-5b, and the insulation layer 3-3 is located between the wall panels 3-2 on both sides. The composite wall is connected to the column and the I-beam by cold-bent angle steel, embedded bolts and ordinary bolts. Figure 7 A1, b1, c1, d1, e1, f1, g1, and h1 with arrows are the installation order of the corresponding structures in the figure.

[0062] The two side units 3-5a are fixedly connected to the two end columns 1 respectively, and the middle unit 3-5b is arranged between the two side units 3-5a every 800 to 1200 mm. A group of cold-bent thin-walled steel pipes 3-1a are arranged between the side unit 3-5a and the middle unit 3-5b and between adjacent middle units 3-5b (i.e., one cold-bent thin-walled steel pipe 3-1a is arranged at each end of the side unit and each end of the middle unit). Since the side unit 3-5a and the middle unit 3-5b are both prefabricated components, the cold-bent thin-walled steel pipes in the prefabricated plate units arranged opposite to each other on both sides of the arch support are directly connected through X-shaped steel sheets during installation; then, according to design requirements, cold-bent thin-walled steel pipes are selectively arranged in pairs on both sides of the arch support at the post-assembly position and tied through X-shaped steel sheets, and finally the post-assembly position is embedded in the insulation layer and the wall panels are installed.

[0063] The arch support is arranged inside the cold-bent thin-walled steel frame 3-1, and the components on both sides of the wall (including cold-bent thin-walled steel pipes, wall panels, prefabricated panel units, etc.) need to be installed synchronously and separately; the cold-bent thin-walled steel pipes on both sides of the wall are symmetrical and separated, and the corresponding cold-bent thin-walled steel pipes on both sides need to be tied together by X-shaped steel sheets to form a stable wall frame; and operating space is required when installing the X-shaped steel sheets, so a position for later assembly needs to be reserved between the side units and the middle units.

[0064] In addition, the intermediate unit may not be provided, and the intermediate unit is provided only to increase the assembly speed. Even if the intermediate unit is not provided, a post-assembly position must be reserved between the two side units to facilitate the cold-bent thin-walled steel pipes in the relatively arranged side units to be tied together through the X-shaped steel sheet.

[0065] The combined wall 3 is connected to the column 1 and the I-beam 4 through cold-bent angle steels 7-1 and bolts; the column 1 is connected to the combined wall 3 on the side wall, located on both sides of the arch support 2, and a pair of cold-bent angle steels 7-1 are symmetrically arranged; the I-beam 4 is connected to the combined wall 3 on the flange, located on both sides of the arch support 2, and a pair of cold-bent angle steels 7-1 are symmetrically arranged; the combined wall 3 is embedded in the eight cold-bent angle steels 7-1 on the left and right columns 1 and the upper and lower I-beams 4, and is fixedly connected to the column 1 and the I-beam 4 by bolts.

[0066] like Figures 8-9 As shown, node 5 includes an arch support-I-beam-column connection node (i.e., the first connection node 5-1) and an I-beam-column connection node (i.e., the second connection node 5-2), the column 1, the arch support 2 and the I-beam 4 are connected through the first connection node 5-1, and the column 1 and the I-beam 4 are connected through the second connection node 5-2. The assembly process of the arch support-I-beam-column connection node 5-1 is as follows: after inserting the top of the lower column 1a into the wooden square 7-2, the upper column 1b is installed just above the lower column 1a, and the lower column 1a and the upper column 1b are fixedly connected by tension bolts 7-5b; after setting the I-beam 4 at the target position, the first node plate 7-3a is embedded in the webs at both ends of the I-beam 4 in pairs, and connected to the side wall of the column 1 by tension bolts 7-5b to form a whole; the first node plate 7-3a is fixedly connected to the steel joint 2-1 of the arch support 2 by a pair of connecting plates 7-4 and ordinary bolts 7-5a, Figure 8The arrows a2, b2, c2, d2 are the installation order of the corresponding structures in the figure. The assembly process of the I-beam-column connection node 5-2 is as follows: after inserting the top of the lower column 1a into the wood 7-2 and the insert plate 7-3c, install the upper column 1b just above the lower column 1a, and use the tension bolts 7-5b to fix the lower column 1a and the upper column 1b together; after setting the I-beam 4 at the target position, embed the second node plates 7-3b in pairs into the webs at both ends of the I-beam 4, use ordinary bolts 7-5a to fix the second node plates 7-3b with the I-beam 4 and the insert plate 7-3c, and connect the second node plates 7-3b with the side wall of the column 1 into a whole through the tension bolts 7-5b; Fig. 9 A3, b3, c3, d3, e3 with arrows are the installation order of the corresponding structures in the figure.

[0067] like Fig.10 As shown, the assembly process of the column 1, the arch support 2 and the combined wall 3 is as follows: Figures 8-9 After the arch support 2 is fixedly connected to the column 1 and the I-beam 4, the cold-bent angle steels 7-1 are arranged in pairs on both sides of the arch support 2, and are fixedly connected to the column 1 and the upper flange of the bottom I-beam 4a by embedded bolts 1-4 and ordinary bolts 7-5a respectively; after ordinary bolts 7-5a (the screws face upward) are set on the lower flange of the top I-beam 4b, the side unit 3-5a is inserted into the cold-bent angle steel 7-1 connected to the upper flange of the bottom I-beam 4a, and the side unit 3-5a is slid along the direction of the cold-bent angle steel 7-1 to the lower column 1a and close to the side wall of the lower column 1a, and the side unit 3-5a is connected to the cold-bent angle steel 7-1 as a whole by self-tapping screws 3-4; the cold-bent thin-walled steel pipes 3-1a and the middle unit 3-5b are installed according to the designed spacing, and Figure 7 The process shown in the figure sequentially completes the assembly of the X-shaped steel sheet 3-1b, the wall panel 3-2 and the insulation layer 3-3; after one leg of the cold-bent angle steel 7-1 passes through the reserved bolt 7-5a of the lower flange of the top I-beam 4b, the other leg of the cold-bent angle steel 7-1 is fixedly connected to the top of the wall panel 3-2 by the self-tapping screw 3-4 to complete the assembly of the combined wall. Fig.10 A4, b4, c4, d4, e4, f4, g4 with arrows are the installation order of the corresponding structures in the figure.

[0068] A novel cold-formed steel wall-arch hybrid structural system assembly method comprises the following steps:

[0069] S1, assembling adjacent layer columns 1, arch supports 2 and I-beams 4;

[0070] S11, after inserting the wooden square 7-2 and the plug board 7-3c into the top of the lower column 1a, install the upper column 1b just above the lower column 1a, and use the tension bolts 7-5b to fix the lower column 1a and the upper column 1b;

[0071] S12, after the I-beam 4 is set at the target position, the first node plate 7-3a and the second node plate 7-3b are embedded in pairs into the webs at both ends of the I-beam 4, and connected to the side wall of the column 1 by the tension bolts 7-5b to form a whole;

[0072] S13, fixing and connecting the first node plate 7-3a to the steel joint 2-1 of the arch support 2 by means of a pair of connecting plates 7-4 and ordinary bolts 7-5a;

[0073] S2, assembling the lower composite wall 3a and the floor slab 6;

[0074] S21, arrange the cold-bent angle steels 7-1 in pairs on both sides of the arch support 2, and respectively fix them to the upper flanges of the lower column 1a and the bottom I-beam 4a through embedded bolts 1-4 and ordinary bolts 7-5a;

[0075] S22, after ordinary bolts 7-5a (with the screw facing upward) are set on the lower flange of the top I-beam 4b, the side unit 3-5a is inserted into the cold-bent angle steel 7-1 connected to the upper flange of the bottom I-beam 4a, and the side unit 3-5a is slid along the direction of the cold-bent angle steel 7-1 to the lower column 1a and close to the side wall of the lower column 1a, and the side unit (3-5a) is connected to the cold-bent angle steel 7-1 as a whole by self-tapping screws 3-4;

[0076] S23, fix the X-shaped steel sheet 3-1b and the cold-bent thin-walled steel pipe 3-1a with self-tapping screws 3-5;

[0077] S24, install the cold-bent thin-walled steel pipe 3-1a and the intermediate unit 3-5b according to the designed spacing, and use the same method as step S23 to fix the X-shaped steel sheet 3-1b and the cold-bent thin-walled steel pipe 3-1a;

[0078] Specifically: first install the side units symmetrically on both sides of the arch support, embed the side units arranged in pairs on both sides (the end of the cold-bent thin-walled steel pipe that is not exposed) into the cold-bent angle steel arranged along the column side, and pass the self-tapping screws through the cold-bent angle steel, wall panel, and cold-bent thin-walled steel pipe in sequence to fix the connection; then use X-shaped steel sheets to tie the cold-bent thin-walled steel pipe at the other end of the side units arranged in pairs on both sides. The middle units are arranged symmetrically on both sides of the arch support, and a post-assembly position is reserved between the middle units and the side units (the post-assembly position can selectively arrange cold-bent thin-walled steel pipes in pairs and tie them together through X-shaped steel sheets according to design requirements, and the spacing formed by the arranged cold-bent thin-walled steel pipes and the cold-bent thin-walled steel pipes in the prefabricated panel units on the same side is generally about 400-600mm), and then the cold-bent thin-walled steel pipes at both ends of the middle units arranged in pairs on both sides are tied together through X-shaped steel sheets; finally, the insulation layer is embedded in the post-assembly position and the wall panels are installed, wherein the two ends of the wall panels are fixed to the cold-bent thin-walled steel pipes exposed in the side units and the middle units through self-tapping screws, and the middle part of the wall panel is fixedly connected to the cold-bent thin-walled steel pipe arranged in the middle of the adjacent prefabricated panel units through self-tapping screws.

[0079] S25, after embedding the insulation layer 3-3 between the side unit 3-5a and the middle unit 3-5b and between the adjacent middle units 3-5b, install the wall panel 3-2, and fix the wall panel 3-2, the cold-bent thin-walled steel pipe 3-1a and the cold-bent angle steel 7-1 of the upper flange of the bottom I-beam 4a with self-tapping screws 3-4;

[0080] S26, after one leg of the cold-bent angle steel 7-1 passes through the reserved bolt 7-5a of the lower flange of the I-beam 4b in step S22, the other leg of the cold-bent angle steel 7-1 is fixedly connected to the top of the wall panel 3-2 by the self-tapping screw 3-4;

[0081] S27, embed the cold-formed steel composite floor 6 into the web of the top I-beam 4b, and fix the floor 6 to the web and lower flange of the I-beam 4b by ordinary bolts 7-5a (see Fig.11 );

[0082] When connecting, ordinary bolts 7-5a pass through the lower flange of the top I-beam 4b, the cold-bent angle steel 7-1 and the floor slab 6 from bottom to top in sequence; in addition, ordinary bolts 7-5a pass through the floor slab 6 on one side, the web of the top I-beam 4b, and the floor slab 6 on the other side in sequence to fix the connection.

[0083] S3, assembling the upper composite wall 3b;

[0084] S31, using the same method as in S2, arrange the cold-bent angle steels 7-1 in pairs on both sides of the arch support 2, and fix the cold-bent angle steels 7-1 arranged along the upper column 1b to the side wall of the upper column 1b through the embedded bolts 1-4;

[0085] S32, after the cold-bent angle steel 7-1 is installed on the upper flange of the top I-beam 4b, the common bolts 7-5a are passed through the cold-formed steel composite floor 6, the upper flange of the top I-beam 4b and the cold-bent angle steel 7-1 in sequence and then fixedly connected (see Fig.11 );

[0086] S33, using the same method as steps S22 to S26 to complete the assembly of the upper composite wall 3b.

[0087] The novel cold-formed steel wall-arch hybrid structural system of the present invention can significantly improve the seismic performance of cold-formed steel structures. The structural system has the advantages of high seismic fortification redundancy, clear force transmission mechanism, good vertical stability, strong anti-overturning ability, etc., and each component can be prefabricated in the factory, and the on-site assembly is simple, which has great promotion value in the prefabricated steel structure residential system.

Claims

1. A cold-formed steel wall-arch hybrid structural system, characterized in that: The invention comprises a plurality of assembled composite wall elements and floor slabs (6), wherein the composite wall elements comprise columns (1), arch supports (2), composite walls (3) and I-shaped beams (4), wherein the columns (1) are arranged at the left and right ends of the composite wall (3); the I-shaped beams (4) are arranged at the upper and lower ends of the composite wall (3), and the two ends of the I-shaped beams (4) are respectively connected to the columns (1); the arch supports (2) are arranged inside the cold-bent thin-walled steel frame (3-1) of the composite wall (3), and the two ends of the arch supports (2) are respectively connected to the diagonal points where the columns (1) and the I-shaped beams (4) are connected, and the arch supports (2) arranged inside four adjacent composite wall elements form a circle; the columns (1) of adjacent layers are fixedly connected, the columns (1), the arch supports (2) and the I-shaped beams (4) are connected via a first connection node (5-1), and the columns (1) and the I-shaped beams (4) are connected via a second connection node (5-2), and the floor slabs are arranged between adjacent layers; The column (1) comprises an embedded steel member (1-1), a cold-bent thick-walled steel pipe (1-2), self-compacting concrete (1-3) and embedded bolts (1-4); the embedded steel member (1-1) is arranged inside the cold-bent thick-walled steel pipe (1-2), and the middle of the cold-bent thick-walled steel pipe (1-2) is filled with the self-compacting concrete (1-3); the middle of the embedded steel member (1-1) is embedded in the self-compacting concrete (1-3), a plurality of groups of embedded bolts (1-4) are horizontally arranged in the self-compacting concrete (1-3), and both ends of the embedded bolts (1-4) extend out of the side wall of the cold-bent thick-walled steel pipe (1-2); the cold-bent thick-walled steel pipe (1-2) at one end of the column (1) not connected to the arch support (2) is grooved; and both ends of the embedded steel member (1-1) and the cold-bent thick-walled steel pipe (1-2) are provided with reserved bolt holes (1-5); Adjacent layer columns (1) at the first connection node (5-1) are connected by means of wooden beams (7-2), the two ends of the wooden beams (7-2) are respectively inserted into the ends of the cold-bent thick-walled steel pipes (1-2) of the adjacent layer columns (1), and the adjacent layer columns (1) are respectively fixedly connected to the wooden beams (7-2) by means of tension bolts (7-5b); The adjacent layer columns (1) at the second connection node (5-2) are connected by means of wooden beams (7-2) and plug plates (7-3c), the two ends of the wooden beams (7-2) are respectively inserted into the ends of the cold-bent thick-walled steel pipes (1-2) of the adjacent layer columns (1), and the adjacent layer columns (1) are respectively fixedly connected to the wooden beams (7-2) by means of tension bolts (7-5b); The arch support (2) comprises a steel joint (2-1), a cold-bent thick-walled round steel pipe (2-2) and concrete (2-3). The cold-bent thick-walled round steel pipe (2-2) is filled with concrete (2-3) and has steel joints (2-1) at both ends. The steel joint (2-1) comprises a round steel pipe (2-1a), a sealing plate (2-1b) and a steel plate (2-1c). A sealing plate (2-1b) is provided at one end of the round steel pipe (2-1a). The two steel plates (2-1c) are arranged in parallel with a gap therebetween and one end of each is fixedly connected to the sealing plate (2-1b) and the round steel pipe (2-1a). Bolt holes (2-1d) are reserved at both ends of the cold-bent thick-walled round steel pipe (2-2), the round steel pipe (2-1a) and the steel plate (2-1c). The end of the cold-bent thick-walled round steel pipe (2-2) is inserted into the round steel pipe (2-1a) and connected to form a whole through tension bolts (7-5b).

2. A cold-formed steel wall-arch hybrid structure system according to claim 1, characterized in that: The combined wall (3) comprises a cold-bent thin-walled steel frame (3-1), a wall panel (3-2), an insulation layer (3-3) and prefabricated panel units (3-5); the cold-bent thin-walled steel frame (3-1) comprises a plurality of groups of cold-bent thin-walled steel pipes (3-1a) and a plurality of X-shaped steel sheets (3-1b); the prefabricated panel units (3-5) are arranged in pairs on both sides of an arch support, a cold-bent thin-walled steel pipe (3-1a) is arranged at both ends of each prefabricated panel unit (3-5), the cold-bent thin-walled steel pipes (3-1a) corresponding to both ends of each pair of prefabricated panel units (3-5) are fixedly connected by a plurality of X-shaped steel sheets (3-1b), there are at least two pairs of prefabricated panel units (3-5), the insulation layer (3-3) and the wall panel (3-2) are arranged between adjacent prefabricated panel units (3-5), and the insulation layer (3-3) is located between the wall panels (3-2) on both sides.

3. A cold-formed steel wall-arch hybrid structure system according to claim 2, characterized in that: The combined wall (3) is connected to the column (1) and the I-beam (4) by means of cold-bent angle steels (7-1) and bolts; a pair of cold-bent angle steels (7-1) are symmetrically arranged on the side wall where the column (1) is connected to the combined wall (3), located on both sides of the arch support (2); a pair of cold-bent angle steels (7-1) are symmetrically arranged on the flange where the I-beam (4) is connected to the combined wall (3), located on both sides of the arch support (2); the combined wall (3) is embedded in the eight cold-bent angle steels (7-1) on the left and right columns (1) and the upper and lower I-beams (4), and is fixedly connected to the column (1) and the I-beam (4) by means of bolts.

4. A cold-formed steel wall-arch hybrid structure system according to claim 3, characterized in that: The first connection node (5-1) comprises a first node plate (7-3a) and a connecting piece (7-4); the first node plate (7-3a) is embedded in a web plate at one end of an I-beam (4) in pairs, fixedly connected to the I-beam (4), and fixedly connected to the side wall of the column (1) via tension bolts (7-5b); the steel joint (2-1) at the end of the arch support (2) is fixedly connected to the first node plate (7-3a) via connecting pieces (7-4) arranged in pairs, and further fixedly connected to the column (1) and the I-beam (4).

5. A cold-formed steel wall-arch hybrid structure system according to claim 4, characterized in that: The second connection node (5-2) comprises a second node plate (7-3b) and a plug plate (7-3c), wherein the second node plate (7-3b) is embedded in pairs in the web plate at one end of the I-beam (4), the plug plate (7-3c) is inserted into the slot of the cold-bent thick-walled steel pipe (1-2) of the column (1), and both ends of the plug plate (7-3c) are embedded between the upper and lower flanges of the I-beam (4), and are located between the second node plate (7-3b) and the web plate of the I-beam (4).

6. A cold-formed steel wall-arch hybrid structure system according to claim 5, characterized in that: The floor slab (6) is embedded in the web of the top I-shaped beam (4b) of the composite wall element and is fixedly connected to the web and lower flange of the I-shaped beam (4b) by bolts.

7. An assembly method of the cold-formed steel wall-arch hybrid structure system according to claim 6, characterized in that: The following steps are involved: S1, assembling adjacent layer columns (1), arch supports (2) and I-beams (4); S11, inserting the wooden plank (7-2) and the plug board (7-3c) into the top of the lower column (1a), installing the upper column (1b) just above the lower column (1a), and fixing the lower column (1a) and the upper column (1b) together through the wooden plank (7-2) and the plug board (7-3c); Only the connection between the column (1) and the I-beam (4) does not need to be installed with a plug plate (7-3c); S12, after the I-beam (4) is set at the target position, the first node plate (7-3a) and the second node plate (7-3b) are respectively embedded in pairs into the web plates at both ends of the I-beam (4), and fixedly connected to the side wall of the column (1); S13, fixing the two ends of the arch support (2) to the first node plate (7-3a) via a pair of connecting plates (7-4); S2, assembling the lower composite wall (3a) and the floor slab (6); S21. On the side wall where the lower column (1a) and the combined wall (3a) are connected, a pair of cold-bent angle steels (7-1) are symmetrically arranged on both sides of the arch support (2); on the upper flange of the bottom I-beam (4a), a pair of cold-bent angle steels (7-1) are symmetrically arranged on both sides of the arch support (2); S22, inserting the side unit (3-5a) into the cold-bent angle steel (7-1) connected to the upper flange of the bottom I-beam (4a), sliding the side unit (3-5a) along the direction of the cold-bent angle steel (7-1) to the lower column (1a) and closely attached to the side wall of the lower column (1a), and fixing the side unit (3-5a) to the lower column (1a), the bottom I-beam (4a) and the cold-bent angle steel (7-1) connected thereto; S23, fixing and connecting two parallel cold-bent thin-walled steel pipes (3-1a) by means of an X-shaped steel sheet (3-1b); S24, installing the cold-bent thin-walled steel pipe (3-1a) and the intermediate unit (3-5b) according to the designed spacing, and using the same method as step S23 to fix the X-shaped steel sheet (3-1b) and the cold-bent thin-walled steel pipe (3-1a) together; S25, after embedding the insulation layer (3-3) between the side unit (3-5a) and the middle unit (3-5b) and between adjacent middle units (3-5b), install the wall panels (3-2) on both sides, and fix the wall panels (3-2), the cold-bent thin-walled steel pipe (3-1a) and the cold-bent angle steel (7-1) on the upper flange of the bottom I-beam (4a); S26, firstly fixing one leg of the cold-bent angle steel (7-1) to the lower flange of the top I-beam (4b), and then fixing the other leg of the cold-bent angle steel (7-1) to the top of the wall panel (3-2); S27, embedding the floor slab (6) into the web of the top I-beam (4b), and fixedly connecting the floor slab with the web and lower flange of the top I-beam (4b); S3, assembling the upper composite wall (3b); S31, using the same method as in S2, arranging cold-bent angle steels (7-1) in pairs on both sides of the arch support (2), and fixing the cold-bent angle steels (7-1) arranged along the upper column (1b) to the side wall of the upper column (1b); S32, then, installing a pair of cold-bent angle steels (7-1) on the upper flange of the top I-beam (4b), and fixing the floor slab (6), the upper flange of the top I-beam (4b) and the cold-bent angle steel (7-1) together; S33, using the same method as steps S22 to S26 to complete the assembly of the upper composite wall (3b).

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