Fabricated steel frame structure system comprising insertion type beam-column joints

Abstract

According to the fabricated steel frame structure system, the inserted high-strength concrete grouting columns and the easily-assembled cold-formed thin-walled steel combined anti-seismic beams are adopted, and prefabrication and assembly are facilitated. The earthquake response is reduced through the replaceable safety piece set, the disc spring damper and the self-resetting hydraulic supporting rod set, and rapid function recovery is achieved. According to the system, a floor and a floor beam are poured into integral rigid connection, and a PVC joint pulling plate is adopted for connecting a filler wall. High-strength concrete grouting enhances column connection and bearing capacity, and cold-formed thin-walled steel members improve production efficiency and reduce cost. The disc spring damper reduces vibration of the double-beam structure and improves energy dissipation capacity. The replaceable safety piece and the web plate are connected to protect the main body structure, and the self-resetting hydraulic supporting rod enhances the structural stability. The beam end inserting plates and the inserting grooves are rapidly assembled, and the anti-seismic performance of the joint is improved. The PVC joint pulling plate prevents the wall body from being pressed and cracked, and the material consumption of the cast-in-place hollow concrete wall is reduced. The floor and the floor beam are integrally poured to increase the structural rigidity and improve the lateral force resistance and the anti-seismic performance.

Description

Technical Field

[0001] The invention relates to an assembled steel frame structure system containing inserted beam-column nodes, and belongs to the field of new civil engineering structure systems and intelligent manufacturing. Background Art

[0002] Prefabricated steel structure construction is an emerging technology that has better quality, faster construction speed, and produces less construction waste than traditional steel structure construction methods. The core of prefabricated steel structure is to prefabricate the main components in the factory and then assemble them on the construction site. Unlike traditional concrete pouring, this method greatly improves construction efficiency and building quality through standardized components produced in the factory.

[0003] The design of beam-column nodes in traditional steel structures is often based on mature mechanical theories and rich practical experience, but when faced with the emerging form of prefabricated steel structures, their design ideas and construction details cannot be directly applied. The uniqueness of prefabricated structures lies in their high degree of prefabrication and assembly, which requires node design to not only meet the basic requirements of strength, rigidity and stability, but also take into account the convenience of easy installation, disassembly and maintenance, as well as the flexibility to adapt to different building functional requirements.

[0004] Compared with conventional construction technology, prefabricated steel structure construction is still an emerging field, and the design and construction guidelines for prefabricated steel frame structure systems have not yet been perfected. The structural performance and load transfer mechanism of prefabricated structures are significantly different from those of traditional steel frame structures. Therefore, the current design for traditional structures is not applicable to prefabricated structure design. In addition, the existing prefabricated steel structure connection nodes have certain limitations due to their own construction practices while meeting the needs of different buildings.

[0005] Although the existing prefabricated steel frame structure system design meets the basic structural requirements to a certain extent, it is often difficult to fully meet the market's urgent demand for efficient, economical and safe modular building solutions due to limitations such as complex structure, high cost or insufficient seismic performance. Especially in areas where natural disasters such as earthquakes are frequent, how to design a beam-column node structure that can effectively transfer loads and significantly improve seismic performance has become a technical problem that needs to be overcome in the field of modular steel structures.

[0006] At present, ordinary prefabricated structures still need to be welded, bolted, or assembled on site using complex components. At the same time, in prefabricated structures, the connection between prefabricated parts is the most important part, and it is also the weak point in the prefabricated structure. From the results of the earthquake damage survey of prefabricated structures, it can be seen that the damage to the prefabricated parts in the structure is relatively minor, and the main damage is concentrated at the node connections. Therefore, it is necessary to develop a more mature node connection and installation mode that meets both earthquake resistance requirements and convenient assembly requirements to adapt to different assembly environments.

[0007] In recent years, the development of inserted high-strength concrete grouting columns, cold-bent thin-walled steel beams, flexible connection walls and various dampers has provided new design ideas for the quick assembly and seismic energy dissipation of prefabricated steel structures. Inserted high-strength concrete grouting columns can achieve close connection and stiffness enhancement between columns while being easy to assemble. High-strength concrete grouting can also improve the bearing capacity and bending strength of the column section. Cold-bent thin-walled C-shaped steel of the same specification can be functionally differentiated through different assembly designs, which can improve production efficiency and save material costs. The flexible connection between the structural wall and the steel structure frame can effectively reduce the interaction between the beam, column, plate and wall under earthquake action. In addition, the reasonable use of dampers can effectively reduce the vibration amplitude and resonance effect of the structure during earthquakes and improve the energy dissipation capacity of the structure. Therefore, combined with the above-mentioned assembly and shock absorption measures, a prefabricated steel frame structure system with inserted beam-column nodes that is easy to assemble and has strong seismic performance can be developed for steel frame structures. Summary of the invention

[0008] The present invention proposes an assembled steel frame structure system with an inserted beam-column node, and uses an inserted high-strength concrete grouting column-easy-to-assemble cold-bent thin-walled steel composite seismic beam as the main steel frame structure, which is convenient for prefabrication and assembly. The use of a replaceable safety plate group, a disc spring damper, and a self-resetting liquid support rod group can effectively reduce the structural response under the action of an earthquake, and at the same time, the structure can be quickly restored in time when it is damaged by an earthquake. In addition, the upper reinforced concrete floor slab and the upper floor beam are cast together to form an overall rigid connection, and then the lower ceiling is carried out, and the PVC structure seam plate is used to connect the cast-in-place frame filling wall as the structural system wall. The high-strength concrete grouting can achieve a close connection of the column, and at the same time increase the rigidity of the hollow steel pipe column, the bearing capacity of the column section and the bending strength. Cold-bent thin-walled C-shaped steel prefabricated components with the same specifications as the plate beam and the ceiling beam can be mass-produced, improve production efficiency, save materials and reduce costs. At the same time, the construction can be simplified to ensure the assembly quality. Disc spring dampers are set between the floor beams and the ceiling beams. At the same time, the double beam connection can produce a composite effect, which can effectively reduce the vibration amplitude of the double beam structure during an earthquake, effectively reduce the resonance effect of the structure, effectively improve the energy dissipation capacity of the structure, and enhance the seismic performance of the structure. The design of the replaceable fuse plate and the web connection can effectively realize the outward movement of the plastic hinge and protect the main structure from damage. Make full use of local plastic deformation and friction between interfaces to dissipate energy, slow down the structural response, and facilitate post-earthquake repair. The self-resetting liquid support rod under the beam can effectively improve the seismic performance of the structure, enhance the stability and safety of the structure by dissipating energy and controlling the displacement of the structure, and also play the role of forming the lower reinforcement rib. The setting of the beam end plug plate and slot can realize the rapid assembly of components on the construction site, and also help to improve the seismic performance of the node, so that it can provide effective structural support in earthquakes. In addition, the PVC structural seam plate can flexibly connect the structural wall with the steel structure frame to avoid the compression cracking of the wall due to the deformation of the frame column and beam. Improve the seismic performance of the steel frame structure. At the same time, the use of cast-in-place hollow concrete walls with PVC seam panels and hollow PVC pipes can effectively reduce material consumption and simplify construction. Casting the floor slab together with the upper floor beam can fully consider the elastic and elastic-plastic stress of the composite frame structure, increase the rigidity of the overall structure, and greatly improve the lateral force resistance and seismic performance of the system.

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

[0010] A prefabricated steel frame structure system with an inserted beam-column node, wherein the steel frame beam-column node seismic resistant structure comprises: an inserted high-strength concrete grouting steel pipe column (1), an easy-to-assemble cold-bent thin-walled steel composite seismic resistant beam (2), a steel pipe column connecting plate (3), a disc spring damper (4), a self-resetting liquid support rod group (5), a seam plate cast-in-place frame filling wall (6), an upper reinforced concrete floor (7), a lower ceiling (8), a steel pipe column (9), an inserted pipe (10), a raised shear key (11), a grouting hole (12), a lower column (13), an upper column (14), a cold-bent thin-walled C-shaped steel main beam section (15), a deformation safety plate (16), a friction safety plate (17), a cold-bent thin-walled C-shaped steel beam end section (18), a beam end plug plate (19), a beam end slot (20), a replaceable Connecting web (21), connecting pad (22), connecting angle steel (23), ceiling beam cold-bent thin-walled C-shaped steel (24), rubber friction pad (25), steel gasket (26), rubber damping pad (27), disc spring (28), positioning pin (29), self-resetting liquid support (30), rubber connecting block (31), pin connecting piece (32), PVC hollow tube (33), longitudinal tie bar (34), longitudinal PVC structural seam plate (35), transverse PVC structural seam plate (36), transverse tie bar (37), longitudinal reinforcement (38), stirrup (39), wall panel (40), cover plate above safety plate (41), precast reinforced concrete floor (42), cast-in-place column concrete floor (43), filling foam (44), steel cover plate (45), gypsum board (46).

[0011] The inserted high-strength concrete grouting steel pipe column comprises a steel pipe column (9) and an insert pipe (10). The specifications of the inserted high-strength concrete grouting steel pipe columns provided on each layer are the same. The insert pipe of the lower column is inserted into the lower part of the upper column for assembly. A raised shear key (11) is provided on the insert pipe to improve the bonding strength between the steel pipe column and the concrete. A grouting hole (12) is provided on the steel pipe column, and high-strength concrete is used for grouting in the hollow steel pipe column (9) after assembly. The inserted high-strength concrete grouting steel pipe column in the same node is fixed by a steel pipe column connecting plate (3). After the lower column (13) is assembled, the lower column (13) is welded and fixed using the steel pipe column connecting plate (3), and then the upper column (14) is assembled.

[0012] The easy-to-assemble cold-bent thin-walled steel composite seismic beam (2) is composed of a cold-bent thin-walled C-shaped steel main beam section (15), a deformation safety plate (16), a friction safety plate (17), a cold-bent thin-walled C-shaped steel beam end section (18), a beam end plug plate (19), a beam end slot (20), a replaceable connecting web (21), a connecting pad (22), and a connecting angle steel (23). The cold-bent thin-walled C-shaped steel main beam section (15) and the end beam section (18) are connected by a replaceable connecting web (21), a replaceable deformation safety plate (16) and a friction safety plate (17), and fixed by high-strength bolts. The end beam section (18) and the beam end plug plate (19) are welded during the prefabrication process, and are reinforced by the connecting angle steel (23) during the assembly process and fixed to the hollow steel pipe column (9) by high-strength bolts. The beam end slot is welded on the hollow steel pipe column (9), and the beam end plug plate (19) is inserted into the beam end slot (20) during the assembly process. The width of the beam end slot should be the same as the width of the hollow steel pipe column (9).

[0013] The easy-to-assemble cold-bent thin-walled steel composite seismic beam comprises two main parts, an upper floor beam and a lower ceiling beam. The floor beam is formed by splicing two cold-bent thin-walled C-shaped steel (15), a connecting pad (22) is arranged in the middle and fixed with high-strength bolts, a beam end plug plate is arranged at the beam end section, and the corresponding beam end slot is welded to the upper hollow steel pipe column (14). The floor beam is used as the main beam to be cast and connected with the prefabricated reinforced concrete floor. The lower ceiling beam is formed by a cold-bent thin-walled C-shaped steel (24) of the same specification, the main beam section and the beam end section are also connected by a web, a deformation safety plate (16), and a friction safety plate (17), a beam end plug plate is arranged at the beam end section, and the corresponding beam end slot is welded to the lower hollow steel pipe column (13). The floor beam and the ceiling beam are connected by a disc spring damper (4). The width of the two floor beams after splicing is the same as the width of the ceiling beam.

[0014] The replaceable bending energy dissipation fuse (16) is made of low yield point steel, and the design bending angle range is 20°-30°. The replaceable friction fuse (17) is made by sandblasting a high-strength steel plate with a sandblasting machine, and the friction coefficient between the fuse and the beam is enhanced by spraying roughness treatment, and the friction coefficient should be greater than 0.3.

[0015] The disc spring damper (4) is composed of a rubber friction pad (25), a steel gasket (26), a rubber damping pad (27), a disc spring (28), and a positioning pin (29). The disc spring (28) is placed in two layers of steel gaskets (26), and the upper layer of the damper is provided with a rubber damping pad (27). A rough rubber friction pad (25) is provided on the outermost side of the damper. During the assembly process, the damper is connected to the lower flange of the upper floor beam and the upper flange of the lower ceiling beam by high-strength bolts.

[0016] The self-resetting liquid support group (5) is composed of four self-resetting liquid supports (30), a rubber connecting block (31), and a pin connecting piece (32), and is assembled below the lower ceiling beam, with a design angle range of 40°ˉ50°.

[0017] The seam-casting concrete filling wall (6) is composed of a PVC hollow tube (33), a longitudinal tie bar (34), a longitudinal PVC structure seam-casting plate (35), a transverse PVC structure seam-casting plate (36), a transverse tie bar (37), a longitudinal bar (38), a stirrup (39), a wall panel (40), cast-in-place concrete, and a cover panel (41) above the safety plate. A transverse PVC structure seam-casting plate (36) is arranged above the middle position of two floor beams (2) on the upper layer, a longitudinal PVC structure seam-casting plate (35) is arranged at the middle position of high-strength concrete grouting columns on both sides, and longitudinal tie bars (34) and transverse tie bars (37) are arranged on the PVC seam-casting plate.

[0018] The floor is composed of a prefabricated reinforced concrete floor (42), a cast-in-place column concrete floor (43), a filling foam (44) and a steel cover plate (45). During the assembly process, a template is laid on the steel frame, and the prefabricated reinforced concrete floor (42) is placed on the template. Then, the cast-in-place column concrete area floor of the node and beam part is poured. During the pouring, the floor slab and the upper floor beam are poured together to form an integral rigid connection. The area where the safety plate is set at the beam end is not poured, and is filled with polyoxymethylene foam (44) with strong fire resistance, and then the steel cover plate (45) is laid. The ceiling (8) is hoisted on the lower ceiling beam using a light steel keel and gypsum board (46).

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] 1. High-strength and efficient assembly design. The present invention achieves close connection and enhanced rigidity between columns by adopting a high-strength concrete grouting steel pipe column design, while improving the bearing capacity and bending strength of the column section. In addition, the upper floor beam and the lower ceiling beam use cold-bent thin-walled C-shaped steel of the same specification, and achieve functional differentiation through different assembly designs, thereby improving production efficiency and saving material costs. This design not only simplifies the construction process and ensures the assembly quality, but also enhances the elastic-plastic stress performance of the structure through the connection of high-strength bolts and disc spring dampers, effectively avoiding serious damage to the beam.

[0021] 2. Optimization of seismic performance and energy dissipation. The present invention arranges a disc spring damper in the structure, which effectively reduces the vibration amplitude and resonance effect of the double-beam structure during an earthquake, improves the energy dissipation capacity of the structure, and thus significantly improves the seismic performance. At the same time, by adopting the design of replaceable safety plates and web connections, the outward movement of the plastic hinge is achieved, protecting the main structure from damage. During an earthquake, the safety plate group can utilize local plastic deformation and friction between interfaces to dissipate energy and slow down the structural response. In addition, the design of the plug and slot at the node beam-column connection not only realizes rapid assembly, but also improves the seismic performance of the node.

[0022] 3. Improvement of flexible connection and overall structural performance. The present invention adopts cast concrete infill walls connected by PVC seam plates to achieve flexible connection between the structural wall and the steel structure frame, effectively reducing the interaction between beams, columns, plates and walls under earthquake action, avoiding compression cracking of the wall, and improving the seismic performance of the steel frame structure. At the same time, by casting the floor slab and the upper floor beam together, the spatial combination effect of the floor slab when the composite frame structure is subjected to elastic and elastoplastic forces is fully considered, the rigidity of the overall structure is increased, and the lateral force resistance and seismic performance of the system are significantly improved. In addition, the main beam section of the lower ceiling beam and the steel pipe column are connected by self-resetting liquid struts, which further enhances the seismic performance of the structure, improves the strength of the node, and forms the role of the lower reinforcing rib. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of an assembled steel frame structure system with an inserted beam-column node according to the present invention without wall panels, concrete and ceiling

[0024] Figure 2 Schematic diagram of the installation of wall panels, concrete and ceiling for an assembled steel frame structure system with an inserted beam-column node according to the present invention

[0025] Figure 3 Schematic diagram of high-strength concrete grouting steel pipe column

[0026] Figure 4 Schematic diagram of high-strength concrete grouting steel pipe column assembly

[0027] Figure 5 Assembly drawing and exploded view for upper floor beams

[0028] Figure 6 Assembly drawing and exploded view for the lower ceiling beam

[0029] Figure 7 Schematic diagram of replaceable fuse set

[0030] Figure 8 Assembly drawing and exploded view of disc spring damper

[0031] Fig. 9 Assembly drawing and exploded view of the self-resetting hydraulic strut assembly

[0032] Fig.10 Assemble schematic diagram for beam-column joint

[0033] Fig.11 Assembling an exploded view for a beam-column joint

[0034] Fig.12 Schematic diagram of cast-in-place frame filling wall with seam slab without wall panels

[0035] Fig.13 Schematic diagram of setting wall panels for cast-in-place frame infill walls with seam slabs

[0036] Fig.14 Schematic diagram of the cast-in-place frame filling wall assembly of the seam slab

[0037] Fig.15 Assembly diagram for the upper floor

[0038] Fig.16 Diagram of the upper floor without foam filling

[0039] Fig.17 Schematic diagram of the lower ceiling assembly

[0040] In the figure: 1-inserted high-strength concrete grouting steel pipe column, 2-easy-to-assemble cold-bent thin-walled steel composite seismic beam, 3-steel pipe column connection plate, 4-disc spring damper, 5-self-resetting liquid support rod group, 6-seam plate cast-in-place frame filling wall, 7-upper reinforced concrete floor, 8-lower ceiling, 9-steel pipe column, 10-inserted pipe, 11-raised shear key, 12-grouting hole, 13-lower column, 14-upper column, 15-cold-bent thin-walled C-shaped steel main beam section, 16-deformation safety plate, 17-friction safety plate, 18-cold-bent thin-walled C-shaped steel beam end section, 19-beam end plug plate, 20-beam end slot, 21-replaceable connecting web, 22-connecting pad , 23 - connecting angle steel, 24 - cold-bent thin-walled C-shaped steel for ceiling beams, 25 - rubber friction pads, 26 - steel gaskets, 27 - rubber damping pads, 28 - disc springs, 29 - positioning pins, 30 - self-resetting liquid supports, 31 - rubber connecting blocks, 32 - pin connectors, 33 - PVC hollow tubes, 34 - longitudinal tie bars, 35 - longitudinal PVC structural seam plates, 36 - transverse PVC structural seam plates, 37 - transverse tie bars, 38 - longitudinal bars, 39 - stirrups, 40 - wall panels, 41 - cover plates above safety plates, 42 - precast reinforced concrete floors, 43 - cast-in-place column concrete floors, 44 - filling foam, 45 - steel cover plates, 46 - gypsum boards. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-17The present invention is described in detail with reference to the accompanying drawings and embodiments to better understand the structural and functional characteristics of the present invention.

[0042] The present invention can be better understood based on the following examples, but it should be pointed out that the examples are only used to illustrate the present invention, rather than to limit the implementation methods of the present invention. Ordinary researchers in this field can still make other beneficial changes based on the above description.

[0043] Example 1

[0044] The present embodiment provides an assembled steel frame structure system with an inserted beam-column node, mainly comprising: an inserted high-strength concrete grouting steel pipe column (1), an easy-to-assemble cold-bent thin-walled steel composite seismic beam (2), a steel pipe column connecting plate (3), a disc spring damper (4), a self-resetting liquid support rod group (5), a seam plate cast-in-place frame filling wall (6), an upper reinforced concrete floor (7), a lower ceiling (8), a steel pipe column (9), an inserted pipe (10), a raised shear key (11), a grouting hole (12), a lower column (13), an upper column (14), a cold-bent thin-walled C-shaped steel main beam section (15), a deformation safety plate (16), a friction safety plate (17), a cold-bent thin-walled C-shaped steel beam end section (18), a beam end plug plate (19), a beam end slot (20), and a replaceable A replaceable connecting web (21), a connecting pad (22), a connecting angle steel (23), a ceiling beam cold-bent thin-walled C-shaped steel (24), a rubber friction pad (25), a steel gasket (26), a rubber damping pad (27), a disc spring (28), a positioning pin (29), a self-resetting liquid support (30), a rubber connecting block (31), a pin connecting piece (32), a PVC hollow tube (33), a longitudinal tie bar (34), a longitudinal PVC structural seam plate (35), a transverse PVC structural seam plate (36), a transverse tie bar (37), a longitudinal bar (38), a stirrup (39), a wall panel (40), a cover plate above the safety plate (41), a precast reinforced concrete floor (42), a cast-in-place column concrete floor (43), a filling foam (44), and a steel cover plate (45).

[0045] The implementation steps are as follows:

[0046] 1) For a steel frame structure building, an assembled steel frame structure system with inserted beam-column nodes is set up. First, the size and quantity of each component are determined according to the actual project needs. Then, the hollow steel pipe column, steel pipe column connection plate, easy-to-assemble cold-bent thin-walled steel composite seismic beam, disc spring damper, self-resetting liquid support rod group and PVC seam plate are prefabricated in the factory. Then, they are assembled at the construction site.

[0047] 2) The steel frame structure has a floor height of 3500mm, a column grid of 6000mm×6000mm, a hollow steel pipe column section size of 300mm×300mm, and a beam span of 6000m. The hollow steel pipe column is made of Q345B steel, with a material strength of 345MPa and a steel pipe wall thickness of 13mm. The cold-bent thin-walled C-shaped steel has a section size of 250mm×120mm, Q235B steel, a material strength of 235MPa, and a thickness of 3mm.

[0048] 3) The four lower-layer inserted high-strength concrete grouting steel pipe columns in the same node are fixed by the steel pipe column connection plate. After the four lower-layer columns are assembled, the lower-layer columns are welded and fixed using the steel pipe column connection plate, and then the insertion pipes of the lower-layer columns are inserted into the lower part of the upper-layer columns for assembly. A raised shear key is set on the insertion pipe to improve the bonding strength between the steel pipe column and the concrete. Grouting holes are set on the steel pipe column. After assembly, high-strength concrete is used for grouting in the hollow steel pipe column. The design strength grade of the concrete is C50.

[0049] 4) The cold-bent thin-walled C-shaped steel main beam section and the end beam section are connected with replaceable connecting webs and replaceable fuse plates, fixed with high-strength bolts, and prefabricated in the factory. The end beam section and the beam end plug plate are welded during the prefabrication process, and are reinforced with connecting angle steel and fixed to the hollow steel pipe column with high-strength bolts during the assembly process. The floor beam is made of two pieces of cold-bent thin-walled C-shaped steel, with a connecting pad in the middle and fixed with high-strength bolts. The lower ceiling beam uses a piece of cold-bent thin-walled C-shaped steel with the same specifications. The beam end slot is welded to the hollow steel pipe column, and the beam end plug plate is inserted into the beam end slot during the assembly process. The floor beam is cast and connected to the prefabricated reinforced concrete floor as the main beam. The floor beam and the ceiling beam are connected by disc spring dampers.

[0050] 5) A replaceable fuse set is set between the main beam section and the beam end section of the floor beam and ceiling beam, including a bending energy dissipation fuse and a friction fuse. The bending energy dissipation fuse is made of low yield point steel Q235, with a size of 150mm×50mm, a thickness of 10mm, a bending radius of 100mm, and a bending angle of 20°. The bending deformation of the bending fuse is used to dissipate energy. The friction fuse is made by sandblasting a high-strength steel plate with a sandblasting machine, and the friction coefficient between the fuse and the beam is enhanced by roughening. The friction fuse is made of Q690 steel, with a size of 150mm×50mm, a thickness of 12mm, a surface roughness of Ra=1.6μm, a friction coefficient of 0.4, and is in direct contact with the ceiling beam.

[0051] 6) The overall size of the disc spring damper is 250mm×250mm. The disc spring is made of GCr15 carbon steel, the spring hardness is 1000N / mm, and the maximum compression load is 40kN. The rubber friction pad is made of NR rubber. The steel gasket is made of Q345B steel, and the rubber damping pad is made of SBR rubber with a roughness of Ra 1.6μm. The disc spring is placed in the upper and lower layers of steel gaskets, and the upper layer of the damper is provided with a rubber damping pad. A rough rubber friction pad is provided on the outermost side of the damper to increase the friction with the contact surface with the beam. During the assembly process, the damper is connected to the lower flange of the upper floor beam and the upper flange of the lower ceiling beam by high-strength bolts, and the overall height of the damper is the distance between the upper and lower beams.

[0052] 7) The self-resetting hydraulic support group is installed under the lower ceiling beam, with a design angle range of 40°-50°. The self-resetting hydraulic support rod is made of 40Cr alloy steel, with a total length of 400mm, a hydraulic cylinder diameter of 20mm, and a piston rod diameter of 10mm. The hydraulic damping coefficient is 50kN·s / m, the maximum working pressure is 70MPa, the maximum bearing capacity is 50kN, and the reset force is 20kN.

[0053] 8) The diameter of the PVC hollow tube used for pouring concrete filling wall of the seam plate is 100mm and the wall thickness is 5mm. The size of each PVC structural seam plate is 250mm×50mm. The tie bars and wall reinforcements are HRB400 threaded steel. The diameter of the tie bars is 12mm, the diameter of the longitudinal bars is 10mm, the diameter of the stirrups is 8mm, and the spacing between each reinforcement is 200mm. The wall panels are prefabricated concrete wall panels, and the first concrete poured is C30 concrete. The cover plate above the safety plate is a galvanized steel plate. A horizontal PVC structural seam plate is set above the middle position of the two floor beams on the upper floor, and a longitudinal PVC structural seam plate is set in the middle position of the high-strength concrete grouting columns on both sides. The longitudinal tie bars and transverse tie bars are set on the PVC seam plate. Then, the PVC hollow tubes are arranged longitudinally, the wall panels are set and the concrete is poured.

[0054] 9) During the assembly process, the formwork is laid on the steel frame, and the prefabricated reinforced concrete floor is placed on the formwork. The prefabricated reinforced concrete floor steel bar adopts HRB400 grade steel bar with a diameter of 12mm, a spacing of 200mm, and C30 concrete. After that, C30 concrete is used to pour the floor of the cast-in-place column concrete area of ​​the node and beam part. During the pouring, the floor slab and the upper floor beam are poured together to form an overall rigid connection. The area where the safety plate is set at the end of the beam is not poured, but filled with polyoxymethylene foam with strong fire resistance, and then galvanized steel cover is laid. The ceiling is suspended on the lower ceiling beam, using light steel keel and gypsum board. The keel specification is 50mm×25mm, and the thickness of the gypsum board is 12mm.

[0055] The above is a typical embodiment of the present invention, but the implementation of the present invention is not limited thereto.

Claims

1. An assembled steel frame structure system with an inserted beam-column node, the seismic resistant structure of the steel frame beam-column node comprising: Inserted high-strength concrete grouting steel pipe column, easy-to-assemble cold-bent thin-walled steel composite seismic beam, steel pipe column connection plate, disc spring damper, self-resetting liquid strut group, seam plate cast-in-place frame filling wall, upper reinforced concrete floor, lower ceiling, steel pipe column, insertion pipe, raised shear key, grouting hole, lower column, upper column, cold-bent thin-walled C-shaped steel main beam section, deformation safety plate, friction safety plate, cold-bent thin-walled C-shaped steel beam end section, beam end plug plate, beam end slot, replaceable connection belly Plates, connecting pads, connecting angle steels, cold-bent thin-walled C-shaped steel for ceiling beams, rubber friction pads, steel gaskets, rubber damping pads, disc springs, locating pins, self-resetting liquid supports, rubber connecting blocks, pin connectors, PVC hollow tubes, longitudinal tie bars, longitudinal PVC structural seam plates, transverse PVC structural seam plates, transverse tie bars, longitudinal bars, stirrups, wall panels, cover plates above safety plates, precast reinforced concrete floors, cast-in-place column concrete floors, filling foam, steel cover plates, and gypsum boards.

2. The assembled steel frame structure system with inserted beam-column joints according to claim 1 is characterized in that: The inserted high-strength concrete grouting steel pipe column includes a steel pipe column and an insert pipe. The specifications of the inserted high-strength concrete grouting steel pipe columns installed on each floor are the same. The insert pipe of the lower column is inserted into the lower part of the upper column for assembly. A raised shear key is provided on the insert pipe to improve the bonding strength between the steel pipe column and the concrete. Grouting holes are provided on the steel pipe column, and high-strength concrete is used for grouting in the hollow steel pipe column after assembly. The inserted high-strength concrete grouting steel pipe column in the same node is fixed by a steel pipe column connecting plate. After the lower column is assembled, the lower column is welded and fixed using a steel pipe column connecting plate, and then the upper column is assembled.

3. The assembled steel frame structure system with inserted beam-column joints according to claim 1 is characterized in that: The easy-to-assemble cold-bent thin-walled steel composite seismic beam consists of a cold-bent thin-walled C-shaped steel main beam section, a deformation safety plate, a friction safety plate, a cold-bent thin-walled C-shaped steel beam end section, a beam end plug plate, a beam end slot, a replaceable connecting web, a connecting pad, and a connecting angle steel. The cold-bent thin-walled C-shaped steel main beam section and the end beam section are connected with a replaceable connecting web, a replaceable deformation safety plate and a friction safety plate, and fixed with high-strength bolts. The end beam section and the beam end plug plate are welded during the prefabrication process, and are reinforced with connecting angle steel and fixed to the hollow steel pipe column through high-strength bolts during the assembly process. The beam end slot is welded to the hollow steel pipe column, and the beam end plug plate is inserted into the beam end slot during the assembly process. The width of the beam end slot should be the same as the width of the hollow steel pipe column.

4. The assembled steel frame structure system with inserted beam-column joints according to claim 1 is characterized in that: The easy-to-assemble cold-bent thin-walled steel composite seismic beam consists of two main parts: the upper floor beam and the lower ceiling beam. The floor beam is made of two cold-bent thin-walled C-shaped steels, with a connecting pad in the middle and fixed with high-strength bolts. The beam end section is provided with a beam end plug plate, and the corresponding beam end slot is welded to the upper hollow steel pipe column. The floor beam is cast and connected to the precast reinforced concrete floor as the main beam. The lower ceiling beam uses a piece of cold-bent thin-walled C-shaped steel with the same specifications. The main beam section and the beam end section are also connected with webs, deformation safety plates, and friction safety plates. The beam end section is provided with a beam end plug plate, and the corresponding beam end slot is welded to the lower hollow steel pipe column. The floor beam and the ceiling beam are connected with a disc spring damper. The width of the two floor beams after splicing is the same as the width of the ceiling beam.

5. The assembled steel frame structure system with inserted beam-column joints according to claim 1 is characterized in that: The replaceable bending energy dissipation fuse piece is made of low yield point steel, and the design bending angle range is 20° to 30°. The replaceable friction fuse piece is made by sandblasting a high-strength steel plate with a sandblasting machine, and the friction coefficient between the fuse piece and the beam is enhanced by spraying roughness treatment, and the friction coefficient should be greater than 0.

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6. The assembled steel frame structure system with inserted beam-column joints according to claim 1, characterized in that: The disc spring damper consists of a rubber friction pad, a steel gasket, a rubber damping pad, a disc spring, and a positioning pin. The disc spring is placed between two layers of steel gaskets, and a rubber damping pad is set on the upper layer of the damper. A rough rubber friction pad is set on the outermost side of the damper. During the assembly process, the damper is connected to the lower flange of the upper floor beam and the upper flange of the lower ceiling beam by high-strength bolts.

7. The assembled steel frame structure system with inserted beam-column joints according to claim 1, characterized in that: The self-resetting liquid strut group consists of 4 self-resetting liquid struts, rubber connecting blocks, and pin connectors. It is installed under the lower ceiling beam and has a design angle range of 40°-50°.

8. The assembled steel frame structure system with inserted beam-column joints according to claim 1, characterized in that: The concrete filling wall of the seam plate is composed of PVC hollow tube, longitudinal tie bars, longitudinal PVC structural seam plate, transverse PVC structural seam plate, transverse tie bars, longitudinal bars, stirrups, wall panels, cast-in-place concrete, and a cover plate above the safety plate. A transverse PVC structural seam plate is set above the middle position of the two floor beams on the upper layer, and a longitudinal PVC structural seam plate is set in the middle position of the high-strength concrete grouting columns on both sides. Longitudinal tie bars and transverse tie bars are set on the PVC seam plate.

9. The assembled steel frame structure system with inserted beam-column joints according to claim 1, characterized in that: The floor is composed of precast reinforced concrete floor, cast-in-place column concrete floor, filling foam and steel cover. During the assembly process, the formwork is laid on the steel frame, and the precast reinforced concrete floor is placed on the formwork. Then the cast-in-place column concrete area floor of the node and beam part is poured. During the pouring, the floor slab is poured together with the upper floor beam to form an overall rigid connection. The area where the safety plate is set at the end of the beam is not poured, but filled with polyoxymethylene foam with strong fire resistance, and then the steel cover is laid. The ceiling is suspended on the lower ceiling beam with light steel keel and gypsum board.

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