Steel structure fabricated building and assembly method thereof

Abstract

The invention discloses a steel structure assembly type building and an assembly method thereof, and belongs to the technical field of structure assembly type buildings. Comprising a column component and a beam component fixed to the column component and further comprises a beam box, a prestress and self-resetting unit and an inner pouring structural body, a flange base fixed to the column component is arranged at the bottom of the beam box, and inner protruding parts are arranged on one face or multiple faces of the upper portion of the beam box; a guide hole is formed in the center of the inner convex part; side box seats are integrally cast on the two sides of the inner convex part of the beam box; the faces, away from each other, of the side box bases are hollow. The beam component is an H-shaped steel beam provided with two webs, the prestress and self-resetting unit comprises a clamping seat clamped at the end part of the H-shaped steel beam, and a hexagonal hole is formed in the clamping seat opposite to the guide hole; according to the steel structure assembly type building and the assembly method thereof, a full-bolt assembly system is adopted, and when the joint position deforms, rapid and accurate resetting can be achieved.

Description

Technical Field

[0001] The present invention specifically relates to a steel structure assembled building and an assembly method thereof, and belongs to the technical field of structural assembled buildings. Background Art

[0002] In the process of building construction, in order to improve the construction efficiency of the building, people usually use steel structure prefabricated parts to assemble to form a frame, and then lay building materials on the frame to form a building. In the prior art, when assembling steel structure prefabricated parts to form a frame, it is usually necessary to manually perform multiple welding at high altitudes to complete the assembly. However, this assembly method has high labor intensity and low assembly efficiency. Therefore, China Patent Authorization Announcement No.: CN112031420B discloses a steel structure prefabricated building, which effectively improves the assembly efficiency, but the structure has poor earthquake resistance during the construction process and in the later stage. It is easy to cause deformation of the node position, which cannot be restored after deformation, so that the strength grade of the building is reduced. For example, China Patent Authorization Announcement No.: CN119266422B discloses a steel structure prefabricated building and its assembly method, which uses a force-reducing steel cable to reduce the technical effect of local shear force; but the structure can only resist local shear deformation; in addition, most of the existing steel structure prefabricated buildings adopt a hybrid bolt-welding assembly, which has low construction efficiency, and there are residual stresses and deformations caused by on-site welding at the nodes, which affect the fatigue performance of the structure; in addition, when the steel structure is affected by vibration, it is easy to cause the node bolts to break or the node parts to deform. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes a steel structure prefabricated building and an assembly method thereof, which adopts a full bolt assembly system and can quickly and accurately reset when the node position is deformed.

[0004] The steel structure assembled building of the present invention comprises a column member and a beam member fixed on the column member, and further comprises: A beam box, wherein a flange seat fixed to a column member is provided at the bottom of the beam box, an inner convex portion is provided on one or more surfaces of the upper portion of the beam box; a guide hole is provided at the center of the inner convex portion; side box seats are integrally cast on both sides of the inner convex portion of the beam box; and the side box seats are hollow on one side away from each other; Prestressed and self-resetting unit, the beam component is an H-shaped steel beam with two webs, the prestressed and self-resetting unit includes a holder clamped at the end of the H-shaped steel beam, the holder is provided with a hexagonal hole opposite to the guide hole; a limit rod is clamped in the hexagonal hole, the holder is movably embedded in the inner convex part, after the limit rod movably passes through the guide hole, a disc spring group is sleeved; the disc spring group is sleeved with a shape memory alloy limit ring on the outside; the shape memory alloy limit ring is sleeved with a force disc seat on the outside, and the disc spring group is pressed between the force disc seat and the inner convex part; the limit rod movably passes through the force disc seat and is screwed with a compression power nut; the force disc seat is fixed with a threaded ring on the outside of the compression power nut, and a protective sleeve is screwed on the threaded ring; An internal cast structure, the internal cast structure comprising anchor rods penetrating the center of the beam box and the column member, the beam box and the column member being internally cast with concrete; The end of the beam component is fixed to the side box seat through an annular groove rivet; a shape memory alloy gasket is arranged between the annular groove rivet and the surface of the beam component.

[0005] After the prestressed and self-resetting units are assembled with the beam components, when the steel structure prefabricated building is affected by an earthquake, the column components and beam components will fluctuate up and down synchronously, and the connection position of the beam component and the prestressed and self-resetting units will be deformed, that is, the beam component compresses the shape memory alloy gasket and deforms. The deformation force is in the up and down direction (radial direction of the beam component), so that the node position will be slightly displaced, and the entire beam component will be slightly tilted, releasing the load caused by the fluctuation, avoiding deformation of the node position of the beam component or fracture of the bolts. When the fluctuation disappears, the shape memory alloy gasket will restore the original position to reset the beam component. In addition, the prestressed and self-resetting units are used to decompose and release the deformation load in the length direction (axial direction of the beam component), and assist in the reset of the beam component, that is, the shape memory alloy gasket and the prestressed and self-resetting units are used to cooperate to achieve radial and axial recovery of the beam component, so that the beam component can be accurately restored. The working process of the prestressed and self-resetting unit is as follows: The compression power nut is screwed with the limit rod, so that the compression power nut compresses the end face of the force disc seat, and the disc spring group is pre-compressed by the force disc seat. The elastic force of the disc spring group can be used to apply tension to the holder, so that prestress is formed on both ends of the beam component through the holder; the deformation resistance of the beam component can be improved; at the same time, when the disc spring group is compressed to form prestress, the outer periphery of the compressed disc spring group fits with the inner wall of the shape memory alloy limit ring; when the earthquake fluctuation causes the beam component to tilt slightly as a whole, a group of disc spring groups of prestress and self-reset units at both ends of the beam component are further compressed, and the compression force of another group of disc spring groups of prestress and self-reset units is partially released; the compressed disc spring group is further radially deformed, so that the shape memory alloy limit ring is deformed; when the fluctuation disappears, the disc spring group recovers through its own elasticity, and at the same time, the shape memory alloy limit ring is restored, and the disc spring group is radially limited, so that the disc spring group is accurately restored to its original position.

[0006] The shape memory alloy gasket is made of NiTiNb material, with an austenite phase transformation end temperature Af≤-10℃ and a martensite phase transformation start temperature Ms≥-25℃; the preload force of the ring groove rivet is controllable, with a preload force accuracy of ±2.5%; it realizes the post-shock self-reset function (residual deformation ≤0.3%), and when the ambient temperature changes, the gap is automatically compensated by the shape memory alloy gasket, which can eliminate the virtual position caused by the seasonal temperature difference; the disc spring group stiffness coefficient satisfies k=1.2×10 6 ±5% N / mm.

[0007] Furthermore, card interfaces are provided on both sides of the bottom surface of the end of the beam member; the beam member is carded to the inner side of the card seat at the card interface, and the side box seat, the card seat and the beam member are tightly pressed together and fastened by ring groove rivets and shape memory alloy gaskets; the top surface of the beam member and the top surface of the side box seat are fastened by ring groove rivets and shape memory alloy gaskets; the side box seat, the card seat and the bottom surface of the beam member are pressed with connecting plates and fixed by ring groove rivets and shape memory alloy gaskets; the beam member has a card interface, so that the beam member can be pressed down from the top without being embedded from the end, and the construction is simpler, and after the card interface is provided, the bottom of the beam member is not directly fixed to the side box seat, but is connected by a connecting plate, thereby forming two sets of support systems; when deformed by vibration, the ends of the beam member each disperse the stress through the two sets of support systems.

[0008] Furthermore, the shape memory alloy limiting ring comprises a sleeve body made of Ni-Ti alloy, and deformation grooves are spaced apart at both ends of the sleeve body; the inner wall of the sleeve body is deformed by radial force, and when the radial force disappears, the sleeve body can recover by itself.

[0009] Furthermore, the limit rod includes a limit plate, a hexagonal column engaged with the hexagonal hole is integrally formed at the center of the limit plate, a sliding column slidably installed with the guide hole is integrally formed at the center of the other end of the hexagonal column, and a threaded section screwed with the compression power nut is integrally formed at one end of the sliding column away from the hexagonal column; the limit rod can limit the inner end surface of the socket through the limit plate, the socket and the limit rod are circumferentially limited by the hexagonal column, and it can be ensured that the limit rod can move axially in a straight line.

[0010] Furthermore, a sealing gasket is arranged between the force-bearing disc seat and the inner convex portion; the sealing gasket can form an elastic seal between the force-bearing disc seat and the inner convex portion, which can prevent concrete from entering the inner side of the force-bearing disc seat during concrete pouring and affecting the deformation and recovery ability of the disc spring group and the shape memory alloy limit ring.

[0011] Furthermore, the beam box, flange seat, inner convex part, guide hole and side box seat are all made by integral casting; through the integral casting structure, the overall anti-deformation ability of the beam box and various components on the beam box can be guaranteed.

[0012] Furthermore, the top and bottom surfaces of the holder are respectively fitted with the inner top and bottom surfaces of the H-shaped steel beam; the inner surface of the holder is tightly fitted with the web of the H-shaped steel beam; through the above-mentioned assembly method, excessive gaps between components, which leads to increased wear stroke, are avoided; a tight-fitting installation method is adopted to achieve integrated installation of the holder, H-shaped steel beam and side box seat.

[0013] Furthermore, flange plates are welded at intervals on both sides of the H-shaped steel beam, span beams are arranged at intervals between adjacent beam components, and ends of the span beams are fixed to the flange plates; by assembling column components, beam components and span beams, a three-dimensional support system for prefabricated buildings can be constructed.

[0014] A method for assembling a steel structure prefabricated building is used to assemble a steel structure prefabricated building. The assembly method is specifically as follows: The first step is to install the column components and fix the column components to the embedded parts on the ground; The second step is to assemble the prestressed and self-reset unit, insert the card seat into the inner convex part, then pass the limit rod through the hexagonal hole and the guide hole, and sequentially sleeve the disc spring group, the shape memory alloy limit ring and the force disc seat, then screw the compression power nut with the limit rod, and pre-compress the disc spring group through the force disc seat and the inner convex part; The third step is beam box assembly, which involves hoisting the beam box to the top surface of the column member and fixing the beam box to the column member with double-ended bolts and nuts; The fourth step is to assemble the beam component. First, align the end of the beam component with the clamping seat so that the web of the beam component is clamped with the clamping seat. At the same time, overlap the beam component to the side box seat, and fix the top surface of the beam component to the top surface of the side box seat through ring groove rivets and shape memory alloy gaskets, and fix the two sides of the beam component, the side surface of the side box seat and the clamping seat through ring groove rivets and shape memory alloy gaskets; finally, align and clamp the connecting plate to the side box seat, the clamping seat and the bottom surface of the beam component, and fix it through ring groove rivets and shape memory alloy gaskets; The fifth step is to adjust the prestress and self-reset unit for the second time. First, adjust the torque value of the torque wrench according to the set prestress requirement to complete the torque wrench setting. Then, align the compression power nut with the torque wrench, rotate the torque wrench, and continuously pretighten the compression power nut and the limit rod with the torque wrench. After reaching the set torque value, separate the torque wrench from the compression power nut. Then, screw the protective sleeve with the threaded ring to protect the threads of the compression power nut and the limit rod with the protective sleeve. The sixth step is the construction of the internal cast structure. First, the anchor rod is passed through the center of the beam box and column components. Then, concrete is poured into the beam box. After the concrete is cured and solidified, the inside of the beam box and column components are cast into a solid structure, and the load-bearing plate seat and protective cover are sealed and solidified in position.

[0015] Furthermore, the inner side and end face of the holder, the outer surface of the side box seat and the end face of the force plate are all formed with a 20 μm thick Al2O3 ceramic layer by micro-arc oxidation process, and the Al2O3 ceramic layer can improve the wear resistance between the node components.

[0016] Compared with the prior art, the steel structure prefabricated building and its assembly method of the present invention adopt a reset node structure and a full bolt assembly system to realize the whole process of welding-free assembly of steel structure buildings; the system has high construction precision and adopts a dynamic anti-deformation structure. When the node position is deformed, it can be quickly reset, has excellent seismic performance, and can achieve temperature compensation, which can ensure the stability of the building after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the installation structure of the column component, beam component and beam box of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the beam box of the present invention.

[0019] Figure 3 It is a schematic diagram of the internal installation structure of the beam member and the beam box of the present invention.

[0020] Figure 4 It is a schematic diagram of the overall structure of the prestressed and self-resetting unit of the present invention.

[0021] Figure 5It is a schematic diagram of the axial cross-sectional structure of the prestressed and self-resetting unit of the present invention.

[0022] Figure 6 It is a schematic diagram of the installation structure of the column member, beam box and bracket of the present invention.

[0023] Figure 7 It is a schematic diagram of the installation structure of the column component, beam box, bracket and beam component of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the shape memory alloy limiting ring of the present invention.

[0025] Fig. 9 It is a schematic diagram of the connecting plate structure of the present invention.

[0026] Figure numerals: 1. column member, 2. beam member, 3. beam box, 4. flange seat, 5. inner convex portion, 6. guide hole, 7. side box seat, 8. clamping seat, 9. hexagonal hole, 10. disc spring assembly, 11. shape memory alloy limiting ring, 12. force disk seat, 13. compression power nut, 14. threaded ring, 15. protective cover, 16. anchor rod, 17. concrete, 18. ring groove rivet, 19. clamping interface, 20. connecting plate, 21. sleeve body, 22. deformation groove, 23. limiting disk, 24. hexagonal column, 25. sliding column, 26. sealing gasket, 27. flange plate. DETAILED DESCRIPTION

[0027] Example: like Figures 1 to 9 The steel structure prefabricated building shown in the figure includes a column component 1 and a beam component 2 fixed on the column component 1. The column component 1 is made of 1200MPa grade dual-phase steel (DP1200) cold-formed closed box section (400×400×6mm), and is locally laser quenched to form a gradient strength distribution (surface hardness HV450→core HV320). The column end is processed with an ISO 4032 standard M30 threaded hole array (spacing 50mm, precision IT8 grade). Specifically: the closed box-shaped column component 1 made of DP1200 dual-phase steel has a surface that is laser quenched to form a gradient strength distribution area, the hardness transition gradient is ≤15HV / mm, and the laser quenching power density is 1.2×10^4 W / cm 2 , spot overlap rate 30%; core hardness ≤ HV320, surface hardness ≥ HV450; beam component 2 is made of hot-rolled H-shaped steel (specification HN400×200×8×13); Also includes: The beam box 3 has a flange seat 4 fixed to the column member 1 at the bottom thereof, and the ultimate shear strength of the bolts connecting the column member 1 and the beam box 3 is 640 MPa; an inner convex portion 5 is provided on one or more surfaces of the upper portion of the beam box 3; a guide hole 6 is provided at the center of the inner convex portion 5; the beam box 3 has side box seats 7 integrally cast on both sides of the inner convex portion 5; the side box seats 7 are hollow on the sides away from each other; Prestressed and self-resetting unit, the beam component 2 is an H-shaped steel beam with two webs, the prestressed and self-resetting unit includes a holder 8 clamped at the end of the H-shaped steel beam, the holder 8 is provided with a hexagonal hole 9 opposite to the guide hole 6; a limit rod is clamped in the hexagonal hole 9, the holder 8 is movably embedded in the inner convex part 5, after the limit rod movably passes through the guide hole 6, a disc spring group 10 is sleeved; the disc spring group 10 is sleeved with a shape memory alloy limit ring 11 on the outside; the shape memory alloy limit ring 11 is sleeved with a force disc seat 12 on the outside, and the disc spring group 10 is pressed between the force disc seat 12 and the inner convex part 5; the limit rod movably passes through the force disc seat 12, and is screwed with a compression power nut 13; the force disc seat 12 is fixed with a threaded ring 14 on the outside of the compression power nut 13, and a protective cover 15 is screwed on the threaded ring 14; An internal cast structure, wherein the internal cast structure comprises an anchor rod 16 penetrating through the beam box 3 and the center of the column member 1, and concrete 17 is cast inside the beam box 3 and the column member 1; The end of the beam member 2 is fixed to the side box seat 7 via an annular groove rivet 18 ; a shape memory alloy gasket is provided between the annular groove rivet 18 and the surface of the beam member 2 .

[0028] After the prestressed and self-resetting unit is assembled with the beam component 2, when the steel structure prefabricated building is affected by an earthquake, the column component 1 and the beam component 2 will fluctuate up and down synchronously, and the connection position of the beam component 2 and the prestressed and self-resetting unit will be deformed, that is, the beam component 2 compresses the shape memory alloy gasket and deforms, and the deformation force is in the up and down direction (radial direction of the beam component 2), so that the node part will be slightly displaced, and the beam component 2 will be slightly tilted as a whole, so as to release the load caused by the fluctuation, avoid deformation of the node part of the beam component 2 or breakage of the bolt, and when the fluctuation disappears, the shape memory alloy gasket will restore the original position to reset the beam component 2; in addition, the prestressed and self-resetting unit is used to decompose and release the deformation load in the length direction (axial direction of the beam component 2), and assist in the reset of the beam component 2, that is, the shape memory alloy gasket and the prestressed and self-resetting unit are used to cooperate to realize radial recovery and axial recovery of the beam component 2, so as to accurately restore the beam component 2; The working process of the prestressed and self-resetting unit is as follows: The compression power nut 13 is screwed with the limit rod to compress the end face of the force-bearing disc seat 12, and the disc spring group 10 is pre-compressed by the force-bearing disc seat 12. The elastic force of the disc spring group 10 can apply a pulling force to the clamping seat 8, so that prestress is formed on both ends of the beam component 2 through the clamping seat 8; the deformation resistance of the beam component 2 can be improved; at the same time, when the disc spring group 10 is compressed to form prestress, the outer periphery of the disc spring group 10 fits with the inner wall of the shape memory alloy limit ring 11; when the earthquake fluctuation causes the beam component 2 to tilt slightly as a whole When the beam member 2 is tilted, a set of disc spring groups 10 of prestressed and self-resetting units at both ends of the beam member 2 are further compressed, and the compression force of the other set of disc spring groups 10 of prestressed and self-resetting units is partially released; the compressed disc spring group 10 is further radially deformed, thereby deforming the shape memory alloy limiting ring 11; when the fluctuation disappears, the disc spring group 10 recovers through its own elasticity, and at the same time, the shape memory alloy limiting ring 11 is deformed and restored, radially limiting the disc spring group 10, so that the disc spring group 10 is accurately restored to its original position.

[0029] The shape memory alloy gasket is made of NiTiNb material, with an austenite phase transformation end temperature Af≤-10℃ and a martensite phase transformation start temperature Ms≥-25℃; the preload force of the ring groove rivet 18 is controllable, with a preload force accuracy of ±2.5%; it realizes the post-shock self-reset function (residual deformation ≤0.3%), and when the ambient temperature changes, the gap is automatically compensated by the shape memory alloy gasket, which can eliminate the virtual position caused by the seasonal temperature difference; the disc spring group 10 stiffness coefficient satisfies k=1.2×10 6 ±5% N / mm.

[0030] The bottom surface of the end of the beam component 2 is provided with a card interface 19 on both sides; the beam component 2 is carded to the inner side of the card seat 8 at the card interface 19, and the side box seat 7, the card seat 8 and the beam component 2 are tightly pressed together and fastened by annular groove rivets 18 and shape memory alloy gaskets; the top surface of the beam component 2 and the top surface of the side box seat 7 are fastened by annular groove rivets 18 and shape memory alloy gaskets; the side box seat 7, the card seat 8 and the bottom surface of the beam component 2 are pressed with a connecting plate 20, and fixed by annular groove rivets 18 and shape memory alloy gaskets; the beam component 2 is provided with a card interface 19, so that the beam component 2 can be pressed down from the top without being embedded from the end, and the construction is simpler, and after the card interface 19 is provided, the bottom of the beam component 2 is not directly fixed to the side box seat 7, but is connected by a connecting plate 20, thereby forming two sets of support systems; when deformed by vibration, the ends of the beam component 2 disperse the stress separately through the two sets of support systems.

[0031] The shape memory alloy limiting ring 11 includes a sleeve body 21 made of Ni-Ti alloy, and deformation grooves 22 are spaced apart at both ends of the sleeve body 21; the inner wall of the sleeve body 21 is deformed by radial force, and when the radial force disappears, the sleeve body 21 can recover by itself.

[0032] The limit rod includes a limit plate 23, a hexagonal column 24 engaged with the hexagonal hole 9 is integrally formed at the center of the limit plate 23, a sliding column 25 slidably installed with the guide hole 6 is integrally formed at the center of the other end of the hexagonal column 24, and a threaded section screwed with the compression power nut 13 is integrally formed at one end of the sliding column 25 away from the hexagonal column 24; the limit rod can limit the inner end surface of the holder 8 through the limit plate 23, the holder 8 and the limit rod are circumferentially limited by the hexagonal column 24, and it can be ensured that the limit rod can move axially in a straight line.

[0033] A sealing gasket 26 is provided between the force-bearing disc seat 12 and the inner convex portion 5; the sealing gasket 26 can form an elastic seal between the force-bearing disc seat 12 and the inner convex portion 5, so as to prevent the concrete 17 from entering the inner side of the force-bearing disc seat 12 when the concrete 17 is poured, thereby affecting the deformation and recovery ability of the disc spring group 10 and the shape memory alloy limit ring 11.

[0034] The beam box 3, flange seat 4, inner convex portion 5, guide hole 6 and side box seat 7 are all made of integral casting; the integral casting structure can ensure the overall anti-deformation ability of the beam box 3 and the components on the beam box 3.

[0035] The top and bottom surfaces of the holder 8 are respectively fitted with the inner top and bottom surfaces of the H-shaped steel beam; the inner surface of the holder 8 is tightly fitted with the web of the H-shaped steel beam; through the above-mentioned assembly method, excessive gaps between components can be avoided, which leads to increased wear stroke; a tight fitting installation method is adopted to achieve an integrated installation of the holder 8, H-shaped steel beam and side box seat 7.

[0036] Flange plates 27 are welded at intervals on both sides of the H-shaped steel beam, and span beams are arranged at intervals between adjacent beam components 2, and the ends of the span beams are fixed to the flange plates 27; by assembling the column components 1, the beam components 2 and the span beams, the three-dimensional support system of the prefabricated building is constructed.

[0037] A method for assembling a steel structure prefabricated building is used to assemble a steel structure prefabricated building. The assembly method is specifically as follows: The first step is to install the column component 1 and fix the column component 1 to the ground embedded parts; hoist the column component 1 by a tower crane (lifting capacity ≥ 16t), monitor the verticality in real time by a laser tracker (deviation ≤ H / 2500), and use a torque multiplier (output accuracy ±3%) to complete the fastening of the column component 1 and the ground embedded parts (column foot anchor bolts), with a pre-tightening force of 0.7fub; The second step is to assemble the prestressed and self-reset unit, insert the card seat 8 into the inner convex part 5, then pass the limit rod through the hexagonal hole 9 and the guide hole 6, and sequentially sleeve the disc spring group 10, the shape memory alloy limit ring 11 and the force disc seat 12, then screw the compression power nut 13 with the limit rod, and pre-compress the disc spring group 10 through the force disc seat 12 and the inner convex part 5; The third step is to assemble the beam box 3, hoist the beam box 3 to the top surface of the column member 1, and fix the beam box 3 to the column member 1 by double-end bolts and nuts; The fourth step is to assemble the beam member 2. First, align the end of the beam member 2 with the clamping seat 8 so that the web of the beam member 2 is engaged with the clamping seat 8. At the same time, the beam member 2 is overlapped to the side box seat 7, and the top surface of the beam member 2 is fixed to the top surface of the side box seat 7 by the ring groove rivet 18 and the shape memory alloy gasket, and the two sides of the beam member 2, the side surface of the side box seat 7 and the clamping seat 8 are fixed by the ring groove rivet 18 and the shape memory alloy gasket; finally, the connecting plate 20 is aligned and engaged with the side box seat 7, the clamping seat 8 and the bottom surface of the beam member 2, and fixed by the ring groove rivet 18 and the shape memory alloy gasket; The fifth step is to adjust the prestress and self-reset unit for the second time. First, according to the set prestress requirement, adjust the torque value of the torque wrench to complete the setting of the torque wrench. Then, align the compression power nut 13 with the torque wrench, rotate the torque wrench, and continuously pretighten the compression power nut 13 and the limit rod with the torque wrench. After reaching the set torque value, separate the torque wrench from the compression power nut 13. Then, screw the protective cover 15 with the threaded ring 14, and protect the threads of the compression power nut 13 and the limit rod with the protective cover 15. The sixth step is the construction of the internal cast structure. First, the anchor rod 16 is passed through the center of the beam box 3 and the column component 1. Then, concrete 17 is poured into the beam box 3. The concrete 17 uses a self-compacting concrete 17 with a fluidity ≥ 280 mm. It is cured for 72 hours to complete the curing and solidification of the concrete 17 to achieve the designed strength; the beam box 3 and the column component 1 are cast into a solid structure, and the load-bearing plate seat 12 and the protective cover 15 are sealed and solidified in position.

[0038] The inner side and end face of the holder 8, the outer surface of the side box seat 7 and the end face of the force-bearing plate are all processed by micro-arc oxidation to generate a 20μm thick Al2O3 ceramic layer, and the friction coefficient is stabilized at 0.15±0.02 (tested according to ISO8294 standard).

[0039] The steel structure assembled building and the assembly method thereof of the present invention are applicable to high-rise civil buildings and industrial buildings that need to meet the "GB / T 51232-2016 Technical Standard for Assembled Steel Structure Buildings".

[0040] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A steel structure assembled building, comprising a column member and a beam member fixed on the column member, characterized in that: Also includes: A beam box, wherein a flange seat fixed to a column member is provided at the bottom of the beam box, an inner convex portion is provided on one or more surfaces of the upper portion of the beam box; a guide hole is provided at the center of the inner convex portion; side box seats are integrally cast on both sides of the inner convex portion of the beam box; and the side box seats are hollow on one side away from each other; Prestressed and self-resetting unit, the beam component is an H-shaped steel beam with two webs, the prestressed and self-resetting unit includes a holder clamped at the end of the H-shaped steel beam, the holder is provided with a hexagonal hole opposite to the guide hole; a limit rod is clamped in the hexagonal hole, the holder is movably embedded in the inner convex part, after the limit rod movably passes through the guide hole, a disc spring group is sleeved; the disc spring group is sleeved with a shape memory alloy limit ring on the outside; the shape memory alloy limit ring is sleeved with a force disc seat on the outside, and the disc spring group is pressed between the force disc seat and the inner convex part; the limit rod movably passes through the force disc seat and is screwed with a compression power nut; the force disc seat is fixed with a threaded ring on the outside of the compression power nut, and a protective sleeve is screwed on the threaded ring; An internal cast structure, the internal cast structure comprising anchor rods penetrating the center of the beam box and the column member, the beam box and the column member being internally cast with concrete; The end of the beam component is fixed to the side box seat through an annular groove rivet; a shape memory alloy gasket is arranged between the annular groove rivet and the surface of the beam component.

2. The steel structure prefabricated building according to claim 1, characterized in that: Card interfaces are provided on both sides of the bottom surface of the end of the beam component; the beam component is carded to the inner side of the card seat at the card interface, and the side box seat, the card seat and the beam component are tightly pressed together and fastened by ring groove rivets and shape memory alloy gaskets; the top surface of the beam component and the top surface of the side box seat are fastened by ring groove rivets and shape memory alloy gaskets; the side box seat, the card seat and the bottom surface of the beam component are pressed with connecting plates, and fixed by ring groove rivets and shape memory alloy gaskets.

3. The steel structure prefabricated building according to claim 1, characterized in that: The shape memory alloy limiting ring comprises a sleeve body made of Ni-Ti alloy, and deformation grooves are spaced apart at two ends of the sleeve body.

4. The steel structure prefabricated building according to claim 1, characterized in that: The limiting rod includes a limiting plate, a hexagonal column engaged with the hexagonal hole is integrally formed at the center of the limiting plate, a sliding column slidably installed with the guide hole is integrally formed at the center of the other end of the hexagonal column, and a threaded section screwed to the compression power nut is integrally formed at one end of the sliding column away from the hexagonal column.

5. The steel structure prefabricated building according to claim 1, characterized in that: A sealing gasket is arranged between the force bearing disc seat and the inner convex part.

6. The steel structure prefabricated building according to claim 1, characterized in that: The beam box, flange seat, inner convex part, guide hole and side box seat are all made by integral casting.

7. The steel structure prefabricated building according to claim 1, characterized in that: The top surface and bottom surface of the clamping seat are respectively fitted with the inner top surface and bottom surface of the H-shaped steel beam; the inner surface of the clamping seat is tightly fitted with the web of the H-shaped steel beam.

8. The steel structure prefabricated building according to claim 1, characterized in that: Flange plates are welded at intervals on both sides of the H-shaped steel beam, span beams are arranged at intervals between adjacent beam components, and ends of the span beams are fixed to the flange plates.

9. A method for assembling a steel structure prefabricated building, used for assembling the steel structure prefabricated building according to any one of claims 1 to 8, characterized in that: The assembly method is specifically as follows: The first step is to install the column components and fix the column components to the embedded parts on the ground; The second step is to assemble the prestressed and self-reset unit, insert the card seat into the inner convex part, then pass the limit rod through the hexagonal hole and the guide hole, and sequentially sleeve the disc spring group, the shape memory alloy limit ring and the force disc seat, then screw the compression power nut with the limit rod, and pre-compress the disc spring group through the force disc seat and the inner convex part; The third step is beam box assembly, which involves hoisting the beam box to the top surface of the column member and fixing the beam box to the column member with double-ended bolts and nuts; The fourth step is to assemble the beam component. First, align the end of the beam component with the clamping seat so that the web of the beam component is clamped with the clamping seat. At the same time, overlap the beam component to the side box seat, and fix the top surface of the beam component to the top surface of the side box seat through ring groove rivets and shape memory alloy gaskets, and fix the two sides of the beam component, the side surface of the side box seat and the clamping seat through ring groove rivets and shape memory alloy gaskets; finally, align and clamp the connecting plate to the side box seat, the clamping seat and the bottom surface of the beam component, and fix it through ring groove rivets and shape memory alloy gaskets; The fifth step is to adjust the prestress and self-reset unit for the second time. First, adjust the torque value of the torque wrench according to the set prestress requirement to complete the torque wrench setting. Then, align the compression power nut with the torque wrench, rotate the torque wrench, and continuously pretighten the compression power nut and the limit rod with the torque wrench. After reaching the set torque value, separate the torque wrench from the compression power nut. Then, screw the protective sleeve with the threaded ring to protect the threads of the compression power nut and the limit rod with the protective sleeve. The sixth step is the construction of the internal cast structure. First, the anchor rod is passed through the center of the beam box and column components. Then, concrete is poured into the beam box. After the concrete is cured and solidified, the inside of the beam box and column components are cast into a solid structure, and the load-bearing plate seat and protective cover are sealed and solidified in position.

10. The method for assembling a steel structure prefabricated building according to claim 9, characterized in that: The inner side surface and end surface of the holder, the outer surface of the side box seat and the end surface of the force-bearing disk are all processed by micro-arc oxidation to generate a 20 μm thick Al2O3 ceramic layer.

Images