Eccentric buckling-restrained brace steel frame system with prestressed cables

Abstract

The utility model discloses an eccentric buckling-restrained brace steel frame system with prestressed cables, which relates to the technical field of building anti-seismic structures and comprises a horizontal support section, a vertical support frame and a buckling-restrained brace component. The horizontal cross beams are installed at the two ends of the energy dissipation beam assembly, the vertical supporting frame is connected with the two horizontal cross beams, the buckling restrained supporting assembly is obliquely connected between the horizontal cross beams and the vertical supporting frame, and the intersection points of the buckling restrained supporting assembly and the horizontal cross beams are located in the energy dissipation beam assembly. A prestress steel cable assembly capable of automatically resetting after being pulled is further connected between the end, connected with the horizontal cross beam, of the buckling restrained brace assembly and the vertical supporting frame. Through cooperative work of the replaceable energy dissipation beam assembly, the buckling restrained brace assembly and the prestressed steel cable assembly, the structural system has enough energy dissipation links for energy dissipation.

Description

Technical Field

[0001] The utility model relates to the technical field of earthquake-resistant building structures, in particular to an eccentrically restrained buckling braced steel frame system with prestressed cables. Background Art

[0002] Some buildings suffered severe damage and collapse after experiencing strong earthquakes exceeding the seismic fortification intensity for their area. With my country's rapid economic development, the three levels of seismic design have gradually shifted from being indestructible in small earthquakes, repairable in moderate earthquakes, and surviving in large earthquakes to being indestructible in moderate earthquakes and repairable in large earthquakes. The seismic fortification goals of minimal damage and rapid restoration of structural function after a large earthquake have been proposed and are receiving increasing attention.

[0003] When designing buildings in earthquake-stricken areas, special consideration needs to be given to structural seismic resistance; energy dissipation and seismic isolation technology is one of the most direct and effective ways to achieve good structural seismic performance and post-earthquake functional recovery. Among them, the eccentrically supported steel frame structure is an energy-absorbing and shock-absorbing structural system. According to its design concept, under the action of an earthquake, the energy is dissipated through the plastic deformation of its energy-absorbing section to protect the main structure from damage or collapse, and the damage to the structure is concentrated in the energy-absorbing section. After the earthquake, only the energy-absorbing section needs to be repaired or replaced to restore the function of the structure. The relevant specifications currently implemented in my country, such as the "Technical Code for Steel Structures of High-rise Civil Buildings" (JGJ99-2015), "Code for Seismic Design of Buildings" (GB50011-2010) and "Steel Structure Design Standard" (GB50017-2017), have made general provisions and requirements for the design of eccentrically supported structures. This structure has now been widely used in high-rise building structures.

[0004] Under large earthquake deformation, the energy-absorbing section in an ordinary eccentrically supported structure may reach its limit plastic deformation and undergo component failure. The distribution of internal forces in the frame shows that the diagonal supports are subjected to large axial tensile and compressive stresses and buckle, resulting in stress degradation and leading to instability and failure of the entire structural system. Ordinary steel frame diagonal supports have low lateral stiffness and are difficult to replace, resulting in a complex and expensive post-earthquake repair process. Therefore, the eccentrically supported structure needs to further improve the energy dissipation capacity of the energy-absorbing section to make it compatible with the currently proposed higher seismic fortification targets. Although there are some new eccentric support systems on the market, their pros and cons need to be further considered to improve the seismic energy dissipation and toughness of the structure, give full play to the working principle of the eccentrically supported structure, and promote the improvement of the seismic resistance level of my country's building structures.

[0005] Chinese patent 201910071466.3 discloses a large-clearance recoverable functional steel frame eccentric support system, which consists of Y-shaped diagonal braces, main components and connecting devices, and high-strength bolts are used to assemble the components at the nodes; it includes two welded combined special-shaped columns, two I-beam sections with diagonal support rods, two Y-shaped diagonal braces, an energy-absorbing beam section and several connecting devices; the beam end is strengthened by thickening the flange thickness of the cantilever beam section on the welded combined special-shaped column, and the purpose of plastic hinge outward movement and improved rotation capacity is achieved through the connection method of the cover plate and the gap setting between the cantilever beam section and the I-beam section on the welded combined special-shaped column. Under seismic loads, plastic failure only occurs in the splicing area, while the rest of the parts remain elastic. After the earthquake, the main structure can be restored to its functional state by simply replacing the beam-column node connection device. However, the ductility of the energy-absorbing beam section determines the ductility of the entire eccentrically supported steel frame, as can be seen from the structural form of the eccentrically supported plastic energy-absorbing failure. If the energy-absorbing beam section structure is not improved, the plastic side displacement angle of the structure will increase with the increase of the plastic rotation angle of the energy-absorbing beam section, thereby reducing the structural bearing capacity.

[0006] Chinese Patent 202311153126.8 discloses a K-type eccentrically supported energy-absorbing section replaceable assembled RCS frame system, which includes a vertical support structure, a horizontal support structure, and a steel diagonal brace. The vertical support structure is formed by connecting multiple precast concrete columns in sequence in the vertical direction to form a vertical support structure supported on the foundation; the two adjacent vertical support structures are connected by multiple horizontal support structures spaced apart along the height direction; the horizontal support structure includes: a segmented shear energy-absorbing section and two steel beams; the two steel beams are arranged horizontally relative to each other, connected in the middle by the segmented shear energy-absorbing section, and the other ends are respectively connected to the precast concrete columns on the corresponding sides; the two adjacent horizontal support structures in the height direction are connected by two steel diagonal braces distributed in an "eight" shape, one end of the steel diagonal brace is connected to the connection end of the upper steel beam on the corresponding side and the segmented shear energy-absorbing section, and the other end is connected to the connection end of the precast concrete column on the corresponding side and the lower steel beam. When the structure is subjected to earthquake loads, the O-shaped metal rings between the shear energy-absorbing sections located between the diagonal supports dissipate the seismic energy through plastic deformation, ensuring that the vertical and horizontal support structures remain in an elastic working state after the earthquake. After the earthquake, only the energy-absorbing components need to be replaced for the building to continue to be used. Although this utility model can dissipate seismic energy through plastic deformation of the energy-absorbing beam ends, the vertical and diagonal supports lack obvious seismic structural settings. In rare earthquakes, the O-shaped metal in the energy-absorbing beam ends has a unclear boundary from the plastic stage to the destruction stage and is easily destroyed instantly, resulting in a large amount of plastic deformation of non-energy-absorbing components (beams and columns). The energy-absorbing devices cannot be replaced in time, which leads to the overall destruction of the structure.

[0007] Therefore, in view of its existing shortcomings, a frame structure that can dissipate a large amount of earthquake energy is urgently needed. Utility Model Content

[0008] The purpose of the present utility model is to provide an eccentric restrained buckling brace steel frame system with prestressed cables. Through the coordinated work among replaceable energy-absorbing beam assemblies, restrained buckling brace assemblies and prestressed steel cable assemblies, the structural system has enough energy-absorbing links to dissipate energy. During the action of seismic loads, the structure not only relies on the replaceable energy-absorbing beam assemblies to dissipate seismic energy, but also relies on the tensile capacity of the restrained buckling brace assemblies to further dissipate energy. Finally, the structure is reset through the prestressed steel cable assemblies. The energy-absorbing capacity and toughness are stronger, and the new seismic resistance requirement of "the structure is not damaged in moderate earthquakes and can be repaired in major earthquakes" is easily achieved.

[0009] In order to achieve the purpose of the utility model, the technical solution adopted is: an eccentric restrained buckling brace steel frame system with prestressed cables, including a horizontal support section, a vertical support frame and a restrained buckling brace assembly, the horizontal support section including an energy-absorbing beam assembly of a horizontal beam that can undergo plastic deformation, the horizontal beam being installed at both ends of the energy-absorbing beam assembly, and the vertical support frame being connected to the two horizontal beams respectively, the restrained buckling brace assembly being obliquely connected between the horizontal beam and the vertical support frame, and the intersection of the restrained buckling brace assembly and the horizontal beam being located inside the energy-absorbing beam assembly; a prestressed steel cable assembly that can automatically reset after being pulled is also connected between the end of the restrained buckling brace assembly connected to the horizontal beam and the vertical support frame.

[0010] Furthermore, a first node plate is installed at the upper end of the vertical support frame, and the end of the horizontal beam is connected to the first node plate by bolts.

[0011] Furthermore, a third node plate is installed at the lower end of the vertical support frame, and the end plate at the lower end of the restrained buckling brace assembly is connected to the third node plate by bolts.

[0012] Furthermore, a T-shaped positioning plate is installed at one end of the horizontal beam connected to the energy-absorbing beam assembly, a second node plate is installed on the T-shaped positioning plate, and the end plate at the upper end of the restrained buckling support assembly is connected to the second node plate by bolts.

[0013] Furthermore, a steel cable positioning assembly plate is installed on the vertical support frame, and steel cable positioning blocks are installed on the steel cable positioning assembly plate and the second node plate, and both ends of the prestressed steel cable assembly are respectively connected to the two groups of steel cable positioning blocks.

[0014] Furthermore, the prestressed steel cable assembly includes steel cable structures respectively installed on two steel cable positioning blocks, and a steel cable connecting structure is connected between the two steel cable structures.

[0015] Furthermore, the steel cable structure includes a first steel cable anchor connected to the steel cable positioning block, a second steel cable anchor connected to the steel cable connection structure, and a prestressed first prestressed steel cable connecting the first steel cable anchor and the second steel cable anchor.

[0016] Furthermore, the steel cable connection structure includes connecting blocks respectively connected to two second steel cable anchors, the connecting blocks include a C-shaped outer frame and a bent portion bent vertically inward, the C-shaped outer frames of the two connecting blocks are spliced ​​together to form an annular outer frame, and the bent portions of the two connecting blocks are spliced ​​together to form a connecting rod connecting the opposite sides of the annular outer frame.

[0017] Furthermore, hemispherical grooves are provided on the mating surfaces of the two bent parts, and rotatable hemispherical shafts are installed in the two hemispherical grooves. A transmission rod is also installed on the hemispherical shaft, which obliquely penetrates the side of the bent part and extends outward, and the outer end of the transmission rod is also connected to a damper, and the other end of the damper is connected to an adjusting screw installed on the C-shaped outer frame; the adjusting screw is parallel to the bent part, and the penetration length of the adjusting screw in the C-shaped outer frame is adjustable.

[0018] Furthermore, the bending portion is provided with a movable groove for the transmission rod to swing.

[0019] Furthermore, protective covers are provided on both sides of the two connecting blocks.

[0020] Furthermore, the energy-absorbing beam assembly includes two channel steels arranged back to back, both ends of the channel steels are fixed to the horizontal beam bolts, and the middle part of the web of the two channel steels has a plurality of annular cast irons spaced apart along the axial direction thereof.

[0021] Furthermore, an energy-absorbing beam section stiffening rib is connected between the two flanges of the channel steel, and both sides of the energy-absorbing beam section stiffening rib are welded to the annular cast iron.

[0022] Furthermore, both ends of the web of the channel steel also have fourth node plates.

[0023] Furthermore, opposite L-shaped connecting steel plates are installed on the flanges of the two channel steels, and the two opposite L-shaped connecting steel plates are connected by bolts.

[0024] Furthermore, the vertical support frame includes vertical support steel sections, and transverse stiffening ribs spaced apart along the axial direction are installed on the webs of the vertical support steel sections, and second prestressed steel cables are installed through the plurality of transverse stiffening ribs.

[0025] The beneficial effects of the utility model are:

[0026] The utility model realizes the coordinated work among the replaceable energy-absorbing beam assembly, the restrained buckling support assembly and the prestressed steel cable assembly. When the steel frame structure is subjected to an earthquake, the energy-absorbing beam assembly first consumes the earthquake energy through plastic deformation. As the earthquake action increases, the energy-absorbing beam assembly will first exit the working state, and the restrained buckling support assembly will consume energy through tensile and compressive deformation. The prestressed steel cable assembly can self-reset after the horizontal support section and the vertical support frame undergo angular displacement. The bolts can also consume energy during sliding. After the earthquake, the structural damage can be quickly assessed and the energy-absorbing beam assembly or the restrained buckling support assembly can be replaced. During the action of earthquake loads, the frame system not only relies on the replaceable energy-absorbing beam assembly to dissipate earthquake energy, but also relies on the tensile capacity of the restrained buckling support assembly to further dissipate energy. Finally, the structure is reset through the prestressed steel cable assembly. The energy dissipation and toughness are stronger, and it is easy to achieve the new earthquake-resistant requirements of "structure is not damaged in moderate earthquakes and can be repaired in major earthquakes". The coordinated work of the entire system can realize the energy dissipation capacity of the structure and give full play to the advantages of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification.

[0028] Figure 1 This is a structural diagram of an eccentrically restrained buckling braced steel frame system with prestressed cables provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the node between the horizontal beam and the vertical supporting steel;

[0030] Figure 3 is a schematic diagram of the node between the horizontal beam and the restrained buckling brace assembly;

[0031] Figure 4 It is a structural diagram of the energy dissipation beam assembly;

[0032] Figure 5 It is a structural diagram of a prestressed steel cable assembly;

[0033] Figure 6 It is a structural diagram of the steel cable connection structure;

[0034] Figure 7 It is a structural diagram of the splicing state of two connection blocks;

[0035] Figure 8 This is a schematic diagram of the structure after the adjusting screw is adjusted outside the C-shaped outer frame;

[0036] Figure 9It is a schematic diagram of the structure after the adjusting screw is adjusted into the C-shaped outer frame.

[0037] Markings and corresponding parts names in the accompanying drawings:

[0038] 1. Horizontal beam;

[0039] 2. Vertical support steel;

[0040] 3. First node plate;

[0041] 4. T-shaped positioning plate;

[0042] 5. Second node plate;

[0043] 6. Bottom positioning plate;

[0044] 7. The third node plate;

[0045] 8. Restrained buckling brace assembly;

[0046] 9. Steel cable positioning block;

[0047] 10. Steel cable positioning composite plate;

[0048] 11. Stretching screw;

[0049] 12. First steel cable anchor;

[0050] 13. Steel cable connection assembly;

[0051] 131. First prestressed steel cable, 132. Second steel cable anchor, 133. Connecting block, 134. Hemispherical groove, 135. Movable groove, 136. Hemispherical shaft, 137. Transmission rod, 138. Damper, 139. Adjusting screw;

[0052] 14. Channel steel;

[0053] 15. Stiffening ribs of energy-absorbing beam sections;

[0054] 16. Ring cast iron;

[0055] 17. Fourth node plate;

[0056] 18. L-shaped connecting steel plate;

[0057] 19. Transverse stiffening ribs;

[0058] 20. Second prestressed steel cable;

[0059] 21. Vertical stiffening ribs;

[0060] 22. Triangular stiffening ribs;

[0061] 24. Protective cover. DETAILED DESCRIPTION

[0062] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the relevant content and are not intended to limit the present invention. It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0063] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0064] like Figure 1 As shown, the utility model provides an eccentrically restrained buckling brace steel frame system with prestressed cables, comprising a horizontal support segment, a vertical support frame and a restrained buckling brace assembly 8, wherein there are two vertical support frames and two restrained buckling brace assemblies 8, the vertical support frames are located at both ends of the horizontal support segment, the vertical support frames are perpendicular to the horizontal support segment, one end of the restrained buckling brace assembly 8 is connected to the horizontal support segment, and the other end of the restrained buckling brace assembly 8 is connected to the vertical support frame, so that the horizontal support segment, the two vertical support frames and the two restrained buckling brace assemblies 8 together constitute a K-shaped frame body.

[0065] The horizontal support section includes an energy-absorbing beam assembly and a horizontal beam 1. There are two horizontal beams 1, which are respectively installed at both ends of the energy-absorbing beam assembly, and the two horizontal beams 1 and the energy-absorbing beam assembly are located on the same straight line. The energy-absorbing beam assembly can produce plastic deformation after being subjected to force; the two vertical support frames are respectively installed at one end of the two horizontal beams 1 away from the energy-absorbing beam assembly, one end of the restrained buckling support assembly 8 is connected to the end of the horizontal beam 1 close to the energy-absorbing beam assembly, and the other end of the restrained buckling support assembly 8 is connected to the end of the vertical support frame away from the horizontal beam 1, so that the horizontal beam 1, the restrained buckling support assembly 8, and the vertical support frame together form a right-angled triangle.

[0066] In the present invention, when the restrained buckling brace assembly 8 is installed, it should be ensured that the intersection of the central axis of the restrained buckling brace assembly 8 and the central axis of the horizontal beam 1 is set inside the energy dissipation beam assembly, so that the restrained buckling brace assembly 8 can generate an additional bending moment in the opposite direction to the bending moment at the end of the energy dissipation beam assembly, thereby reducing the bending moment of the restrained buckling brace assembly 8, which is more conducive to seismic energy dissipation.

[0067] The eccentrically restrained buckling braced steel frame system with prestressed cables also includes a prestressed cable assembly, one end of the prestressed cable assembly is connected to one end of the restrained buckling brace assembly 8 connected to the horizontal beam 1, and the other end of the prestressed cable assembly is connected to the vertical support frame. The prestressed cable assembly is parallel to the horizontal beam 1, and the prestressed cable assembly is pulled and the horizontal support section and the vertical support frame undergo angular displacement and then reset themselves.

[0068] In the present invention, by combining the energy-absorbing beam assembly and the restrained buckling support assembly 8, the energy-absorbing beam assembly first enters the plastic stage to dissipate the seismic energy. When the seismic energy continues to increase, the energy-absorbing beam assembly fails, and the restrained buckling support assembly 8 enters the tensile-compression state to dissipate energy. The prestressed steel cable assembly can self-reset after the frame beam undergoes angular displacement, and the bolts can also consume energy during sliding. After the earthquake, the structural damage can be quickly evaluated and the energy-absorbing beam assembly or the restrained buckling support assembly 8 can be replaced. The coordinated work of the entire system can realize the energy-absorbing capacity of the structure and the superiority of the assembly.

[0069] like Figure 2 As shown, in order to facilitate the connection between the vertical support frame and the horizontal beam 1, a first node plate 3 is also welded on the side wall of the vertical support frame, and there are two first node plates 3. The two first node plates 3 are arranged at intervals along the thickness direction of the vertical support frame, and corresponding bolt holes are opened at the ends of the two first node plates 3 and the horizontal beam 1. Bolts are installed in the corresponding bolt holes on the two first node plates 3 and the horizontal beam 1. After the bolts are installed, nuts are tightened to fix them, so that the first node plates 3 and the horizontal beam 1 are fixed by bolts, thereby realizing the connection between the vertical support frame and the horizontal beam 1.

[0070] like Figure 1 As shown, in order to facilitate the connection between the vertical support frame and the restrained buckling support assembly 8, a third node plate 7 is installed at the end of the vertical support frame away from the crossbeam, and both ends of the restrained buckling support assembly 8 have end plates, and corresponding bolt holes are opened on the end plate at one end of the restrained buckling support assembly 8 and the third node plate 7, and bolts are installed in the corresponding bolt holes on the end plate at one end of the restrained buckling support assembly 8 and the third node plate 7. After the bolts are installed, nuts are tightened to fix them, so that the third node plate 7 and the end plate at one end of the restrained buckling support assembly 8 are fixed by bolts, thereby realizing the connection between the vertical support frame and the restrained buckling support assembly 8.

[0071] At the same time, in order to make the installation of the third node plate 7 more stable, a bottom positioning plate 6 is welded to the end of the vertical support frame away from the cross beam, so that one side of the third node plate 7 is welded to the bottom positioning plate 6, and the other side of the third node plate 7 is welded to the vertical support frame, and there are two third node plates 7, and the end plate at one end of the restrained buckling support assembly 8 is located between the two third node plates 7, and the end plate at one end of the restrained buckling support assembly 8 is connected to the two third node plates 7 by bolts.

[0072] like Figure 3 As shown, in order to facilitate the connection between the restrained buckling support assembly 8 and the horizontal beam 1, a T-shaped positioning plate 4 is further installed at one end of the horizontal beam 1 connected to the energy-absorbing beam assembly. The T-shaped positioning plate 4 is located on the lower surface of the horizontal beam 1, and the T-shaped positioning plate 4 is welded and fixed to the horizontal beam 1, and a second node plate 5 is also welded on the T-shaped positioning plate 4, and the two side edges of the second node plate 5 are respectively welded to the two surfaces of the T-shaped positioning plate 4; at the same time, there are two second node plates 5, and the two second node plates 5 are arranged at intervals, and the end plate at the upper end of the restrained buckling support assembly 8 is located between the two second node plates 5, and the second node plate 5 and the end plate at the upper end of the restrained buckling support assembly 8 are provided with corresponding bolt holes, and bolts are installed in the corresponding bolt holes on the end plate at the upper end of the restrained buckling support assembly 8 and the second node plate 5. After the bolts are installed, nuts are tightened to fix them, so that the second node plate 5 and the end plate at the upper end of the restrained buckling support assembly 8 are fixed by bolts, thereby realizing the connection between the horizontal beam 1 and the restrained buckling support assembly 8.

[0073] In order to ensure the structural strength of the T-shaped positioning plate 4, a plurality of triangular stiffening ribs 22 are welded to the side of the T-shaped positioning plate 4 where the second node plate 5 is not installed. The plurality of triangular stiffening ribs 22 are arranged at intervals along the web width direction of the T-shaped positioning plate 4.

[0074] In the present invention, to ensure the structural strength of the horizontal beam 1, a plurality of vertical stiffening ribs 21 are welded to the web of the horizontal beam 1. The plurality of vertical stiffening ribs 21 are spaced apart along the axis of the horizontal beam 1, and the ends of the vertical stiffening ribs 21 are welded to the two webs of the horizontal beam 1. The provision of the vertical stiffening ribs 21 on the horizontal beam 1 further constrains deformation of the ends of the horizontal beam 1.

[0075] like Figure 2As shown, in order to install the prestressed steel cable assembly, a steel cable positioning combination plate 10 is also welded on the vertical support frame, and the top surface of the steel cable positioning combination plate 10 is in contact with the flange of the horizontal beam 1, so that the steel cable positioning combination plate 10 is located at the node of the vertical support frame and the horizontal beam 1, and steel cable positioning blocks 9 are installed on the steel cable positioning combination plate 10 and the second node plate 5. There are two steel cable positioning blocks 9 on the steel cable positioning combination plate 10 and the steel cable positioning blocks 9 on the second node plate 5, of which two steel cable positioning blocks 9 are located on both sides of the steel cable positioning combination plate 10, and the other two steel cable positioning blocks 9 are located on both sides of the second node plate 5, and one end of the prestressed steel cable assembly is locked and fixed with the steel cable positioning combination plate 10 and the steel cable positioning block 9 through a connecting pin shaft, and the other end of the prestressed steel cable assembly is locked and fixed with the second node plate 5 and the steel cable positioning block 9 through a connecting pin shaft, thereby realizing the connection between the vertical support frame, the prestressed steel cable assembly, and the constrained buckling support assembly 8.

[0076] like Figures 5 to 9 As shown, the prestressed cable assembly includes cable structures mounted on two cable positioning blocks 9. The cable structures are capable of swinging on the cable positioning blocks 9. A cable connecting structure is connected between the two cable structures, allowing the cable connecting structure and the cable structure to swing relative to each other. The vertical support frame is connected to the restrained buckling brace assembly 8 at the connection nodes via the cable structures and the cable connecting structure, allowing the cable structures and the cable connecting structure to fully utilize the tensile strength and mechanical properties of the cables.

[0077] like Figure 5 As shown, the cable structure includes a first cable anchor 12, a second cable anchor 132, and a first prestressed cable 131; a rotatable tension screw 11 is installed at both ends of the connecting pin shaft used to fix the second node plate 5 and the cable positioning block 9, and the extended ends of the two tension screws 11 are fixed to the first cable anchor 12. Similarly, two rotatable tension screws 11 are also installed on the cable connection structure, and the extended ends of the two tension screws 11 are fixed to the second cable anchor 132, and the two ends of the first prestressed cable 131 are respectively connected to the first cable anchor 12 and the second cable anchor 132. Of course, there can also be multiple first prestressed cables 131 connected between the first cable anchor 12 and the second cable anchor 132.

[0078] like Figure 6 、 Figure 7As shown, the cable connection structure includes two connecting blocks 133. Specifically, a hinge seat is fixed on each of the two connecting blocks 133. The tension screw 11 connected to the second cable anchor 132 in the two cable structures is rotatably mounted on the hinge seat via a connecting pin. The connecting block 133 includes a C-shaped outer frame and a bent portion. The C-shaped outer frame and the bent portion are an integral structure. The bent portion is located at one end of the C-shaped outer frame and extends from one end of the C-shaped outer frame to the other end of the C-shaped outer frame. At the same time, the two connecting blocks 133 fit together, and when the two connecting blocks 133 are spliced ​​together, the C-shaped outer frames of the two connecting blocks 133 together form an annular outer frame, and the bent portions on the two connecting blocks 133 are connected to form a complete connecting rod. The connecting rod extends along the width direction of the annular outer frame, or the connecting rod extends along the length direction of the annular outer frame.

[0079] like Figure 8 As shown, a hemispherical groove 134 is provided on the mating surface of the two bent parts. When the two bent parts are butted together, the two hemispherical grooves 134 together form a complete spherical chamber; at the same time, a hemispherical shaft 136 is installed in each of the two hemispherical grooves 134. When the two bent parts are butted together, the two hemispherical shafts 136 form a complete ball, which can fully roll in the spherical chamber. A transmission rod 137 is welded to each of the two hemispherical shafts 136. The angle between the central axis of the transmission rod 137 and the axis of the bent portion is less than 90°, so that the transmission rod 137 is inclined relative to the bent portion, and the transmission rod 137 extends outward through the side of the bent portion; at the same time, the end of the transmission rod 137 away from the hemispherical shaft 136 is hinged with a damper 138, and the other end of the damper 138 is hinged with an adjusting screw 139, and the other end of the adjusting screw 139 passes through the C-shaped outer frame of the connecting block 133 and is locked with a nut, and the adjusting screw 139 remains parallel to the bent portion of the connecting block 133.

[0080] In the present invention, after the two hemispherical shafts 136 are installed in the two hemispherical grooves 134, the two hemispherical shafts 136 are locked together. The locking method between the two hemispherical shafts 136 can be: a bolt is implanted in the cross-section of one hemispherical shaft 136, and a threaded hole for the bolt is opened in the cross-section of the other hemispherical shaft 136. When the two hemispherical shafts 136 need to be locked, the bolt on the hemispherical shaft 136 is screwed into the threaded hole on the other hemispherical shaft 136. Of course, the locking method between the two hemispherical shafts 136 can also be adopted in other ways, such as snap-fitting, clamping, etc.

[0081] In the present invention, when the adjusting screw 139 is installed, the adjusting screw 139 preferably extends toward the end of the C-shaped outer frame away from the bent portion; of course, the adjusting screw 139 can also extend toward the end of the C-shaped outer frame with the bent portion. That is, the specific extension direction of the adjusting screw 139 can be adjusted according to actual conditions. In the present invention, by controlling the penetration length of the adjusting screw 139 on the C-shaped outer frame, the adjusting screw 139 adjusts the degree of rotation of the hemispherical shaft 136 in the hemispherical groove 134 through the damper 138 and the transmission rod 137, as shown in FIG. Figure 9 As shown, when the adjusting screw 139 is fully adjusted to the inside of the C-shaped outer frame, the cross section of the hemispherical shaft 136 is flush with the end surface of the bent portion. At this time, when the two connecting blocks 133 are subjected to tension, they can be easily separated; Figure 8 As shown, when the adjusting screw 139 is fully adjusted to the outside of the C-shaped outer frame, the cross section of the hemispherical shaft 136 is inclined to the end face of the bent portion, and the hemispherical shaft 136 is simultaneously located in the hemispherical groove 134, and the two connecting blocks 133 cannot be separated when subjected to tension.

[0082] In addition, in the present invention, when the width of the bending portion is smaller than the diameter of the hemispherical groove 134, the width of the bending portion away from the end of the C-shaped outer frame can be appropriately widened, or the bending portion away from the end of the C-shaped outer frame can be directly set into a spherical structure.

[0083] In the present invention, in order to enable the hemispherical shaft 136 to roll in the hemispherical groove 134, a movable groove 135 is further provided on the bent portion. The movable groove 135 is an arc-shaped groove. The axial direction of the movable groove 135 is consistent with the swing direction of the transmission rod 137, and the transmission rod 137 is installed through the movable groove 135. Through the cooperation between the transmission rod 137 and the movable groove 135, the hemispherical shaft 136 can rotate around the center of the movable groove 135 in the hemispherical groove 134.

[0084] The steel cable connection structure in the prestressed steel cable assembly in the present invention can control the tensioning degree of the first prestressed steel cable 131. The maximum horizontal tension of the prestressed steel cable assembly is located at the mid-span, and the horizontal tension of the anchor point is the smallest. While ensuring the lateral stiffness of the restrained buckling support assembly 8, the adverse effect of the horizontal component of the prestressed steel cable assembly on the node between the vertical support frame and the horizontal beam 1 is reduced.

[0085] In the utility model, protective covers 23 are provided on both sides of the two connecting blocks 133. The two protective covers 23 on the same connecting block 133 are an integral structure with the hinged seat on the connecting block 133. When the two connecting blocks 133 are spliced ​​together, the four protective covers 23 and the outer walls of the two connecting blocks 133 together form a complete surface, making the surface of the steel cable connection structure more complete.

[0086] like Figure 4As shown, the energy-absorbing beam assembly in the present invention includes two channel steels 14, which are arranged back to back. The two ends of the webs of the two channel steels 14 are respectively fitted with the webs of the two horizontal beams 1, and the two ends of the webs of the two channel steels 14 and the ends of the webs of the horizontal beams 1 are provided with corresponding bolt holes, so that the two ends of the two channel steels 14 can be connected to the horizontal beam 1 by bolts.

[0087] To strengthen the connection between the channel steel 14 and the horizontal beam 1, a fourth node plate 17 is welded to each end of the web of the channel steel 14. The fourth node plate 17 also has bolt holes that correspond to the bolt holes on the web of the channel steel 14. When the channel steel 14 and the horizontal beam 1 are bolted together, the ends of the bolts pass through the horizontal beam 1, the two channel steels 14, and the fourth node plates 17 on the two channel steels 14 before being tightened and secured with nuts. Furthermore, a plurality of annular cast irons 16 are welded to the web of the channel steel 14. The outer sides of the annular cast irons 16 are welded to the two webs of the channel steel 14, and the plurality of annular cast irons 16 are arranged at intervals along the axis of the channel steel 14.

[0088] A plurality of energy-absorbing beam segment stiffening ribs 15 are welded to the web of the channel steel 14. The two ends of the energy-absorbing beam segment stiffening ribs 15 are respectively welded to the two flanges of the channel steel 14, and the annular cast iron 16 is located between two adjacent energy-absorbing beam segment stiffening ribs 15. In addition to being welded to the two webs of the channel steel 14, the outer side of the annular cast iron 16 is also welded and fixed to the energy-absorbing beam segment stiffening ribs 15 on both sides.

[0089] In the present invention, the strength of the multiple ring-shaped cast irons 16 on the channel steel 14 can be inconsistent. Specifically, based on the shear force distribution of the energy dissipation beam assembly, the ring-shaped cast irons 16 located at the ends of the channel steel 14 can be selected to be stronger than the ring-shaped cast irons 16 located in the middle of the channel steel 14. This design is more conducive to absorbing energy during earthquakes. In addition, when selecting the channel steel 14, the cross-section of the channel steel 14 should be determined based on the principle that the web of the channel steel 14 is subjected to shear, while the flange of the channel steel 14 is subjected to axial force and bending moment. This ensures that the bending bearing capacity of the energy dissipation beam assembly is greater than its shear bearing capacity, and that it still has sufficient bending strength when the entire cross-section shear yields.

[0090] In order to ensure the integrity of the energy-absorbing beam assembly, a plurality of L-shaped connecting steel plates 18 are welded on the two flanges of the channel steel 14. The multiple L-shaped connecting steel plates 18 on the flanges on the same side of the two channel steels 14 correspond to each other, and the corresponding L-shaped connecting steel plates 18 are connected by bolts, so that the two channel steels 14 are fixed to form a beam, thereby improving the integrity of the energy-absorbing beam assembly.

[0091] In the present invention, the strength of the channel steel 14 must be lower than the steel strength of the restrained buckling brace assembly 8 to prevent the restrained buckling brace assembly 8 from yielding earlier than the energy dissipation beam assembly, thereby causing structural failure and loss of energy dissipation capacity.

[0092] By bolting the two channel steels 14 in the energy-absorbing beam assembly, and also bolting the two channel steels 14 to the horizontal beam 1, when an earthquake occurs, the energy-absorbing beam assembly first undergoes plastic deformation to consume the earthquake energy. As the horizontal load of the earthquake increases, the energy-absorbing beam assembly "blows" like a fuse, and the restrained buckling support assembly 8 is subjected to tension and compression, dissipating the earthquake energy without buckling, thereby maintaining structural stability. At the same time, the restrained buckling support assembly 8 is subjected to the tension of the prestressed steel cable assembly to reduce the displacement angle. After the earthquake, the damaged components can be replaced to quickly restore the function of the building structure.

[0093] In this utility model, if Figure 1 As shown, the vertical support frame includes a vertical support steel 2, and the vertical support steel 2 can be made of I-steel. The web of the vertical support steel 2 is installed with transverse stiffening ribs 19 arranged at intervals along its axial direction, and the two ends of the transverse stiffening ribs 19 are respectively welded to the two flanges of the vertical support steel 2; at the same time, when designing multiple transverse stiffening ribs 19, two of the transverse stiffening ribs 19 are located at the two ends of the vertical support steel 2, and the transverse stiffening ribs 19 located at the two ends of the vertical support steel 2 can be used as end plates of the vertical support steel 2; a second prestressed steel cable 20 is installed through the multiple transverse stiffening ribs 19, and after the second prestressed steel cable 20 passes through the multiple transverse stiffening ribs 19 on the vertical support steel 2, the two ends of the second prestressed steel cable 20 are locked and fixed with nuts to the transverse stiffening ribs 19 located at the two ends of the vertical support steel 2. In the present invention, the number of the second prestressed steel cables 20 commonly installed on the plurality of transverse stiffening ribs 19 in the vertical support frame may be one or more, specifically, for example, two, three, etc.

[0094] The vertical support frame combines the vertical support steel 2 with the second prestressed steel cable 20 so that the second prestressed steel cable 20 can provide a restoring force under the action of an earthquake, thereby reducing structural deformation.

[0095] In the present invention, in order to ensure that the lateral stiffness of the vertical support frame meets the structural requirements, the energy dissipation beam assembly should not be set too long. In the absence of special requirements for the building, its length can generally be 0.1 to 0.15 times the length of the horizontal beam 1.

[0096] The structure of the restrained buckling support assembly 8 in the present invention is a double-layer steel pipe sleeve, the inner core of which is high-strength steel with a cross-shaped cross-section, the inner gap is filled with a mixture of mortar concrete and shock-absorbing materials, and a shock-absorbing ring is arranged between the inner pipe and the outer pipe to further improve the earthquake resistance and energy dissipation capacity; at the same time, the end plates at both ends of the restrained buckling support assembly 8 are prefabricated in the factory, which can achieve rapid repair after an earthquake.

[0097] The second prestressed steel cable 20 and the first prestressed steel cable 131 in the present invention can adopt six bundles of non-bonded prestressed steel strands, and the first prestressed steel cable 131 can control the tension and observe the damage of the steel cable at the same time, so that the damaged part can be replaced in time after the earthquake.

[0098] In the present invention, all bolts are high-strength bolts, and washers are added to the nuts during installation, which can not only increase the contact area of ​​the nuts and increase the friction, but also avoid the nuts being damaged first during the deformation process of the energy-consuming section.

[0099] The present invention achieves this by using a replaceable energy-absorbing beam assembly, a restrained buckling support assembly 8, and a prestressed steel cable assembly to work in coordination. When the steel frame structure is subjected to an earthquake, the energy-absorbing beam assembly first dissipates the earthquake energy through plastic deformation. As the earthquake action increases, the energy-absorbing beam assembly will first exit the working state, and the restrained buckling support assembly 8 will stretch and compress to dissipate energy. The prestressed steel cable assembly can self-reset after the horizontal support section and the vertical support frame undergo angular displacement, and the bolts can also dissipate energy during sliding. After the earthquake, the structural damage can be quickly assessed and the energy-absorbing beam assembly or the restrained buckling support assembly 8 can be replaced. During the action of earthquake loads, the present frame system not only relies on the replaceable energy-absorbing beam assembly to dissipate earthquake energy, but also relies on the tensile capacity of the restrained buckling support assembly 8 to further dissipate energy. Finally, the prestressed steel cable assembly is used to reset the structure. The energy dissipation and toughness are stronger, making it easy to achieve the new earthquake-resistant requirements of "no damage in moderate earthquakes, repairable in major earthquakes." The coordinated work of the entire system can achieve the energy dissipation capacity of the structure and give full play to the advantages of the prefabricated structure.

[0100] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0102] Those skilled in the art will appreciate that the above embodiments are merely for the purpose of illustrating the present invention and are not intended to limit the scope of the present invention. Other variations or modifications may be made based on the above disclosure, and such variations or modifications are still within the scope of the present invention.

Claims

1. An eccentrically restrained buckling braced steel frame system with prestressed cables, characterized in that: The invention comprises a horizontal support section, a vertical support frame and a restrained buckling support assembly (8); the horizontal support section comprises an energy-absorbing beam assembly of a horizontal beam (1) that can undergo plastic deformation; the horizontal beam (1) is installed at both ends of the energy-absorbing beam assembly, and the vertical support frame is respectively connected to the two horizontal beams (1); the restrained buckling support assembly (8) is obliquely connected between the horizontal beam (1) and the vertical support frame, and the intersection of the restrained buckling support assembly (8) and the horizontal beam (1) is located inside the energy-absorbing beam assembly; a prestressed steel cable assembly that can automatically reset after being pulled is also connected between one end of the restrained buckling support assembly (8) connected to the horizontal beam (1) and the vertical support frame.

2. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 1, characterized in that: A first node plate (3) is also installed at the upper end of the vertical support frame, and the end of the horizontal beam (1) is connected to the first node plate (3) by bolts.

3. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 1, characterized in that: A third node plate (7) is also installed at the lower end of the vertical support frame, and the end plate at the lower end of the buckling restraint support assembly (8) is connected to the third node plate (7) via bolts.

4. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 1, characterized in that: A T-shaped positioning plate (4) is also installed at one end of the horizontal beam (1) connected to the energy-absorbing beam assembly, a second node plate (5) is installed on the T-shaped positioning plate (4), and the end plate at the upper end of the restrained buckling support assembly (8) is connected to the second node plate (5) by bolts.

5. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 4, characterized in that: A steel cable positioning assembly plate (10) is also installed on the vertical support frame, and steel cable positioning assembly plate (10) and the second node plate (5) are both installed with steel cable positioning blocks (9), and both ends of the prestressed steel cable assembly are respectively connected to the two sets of steel cable positioning blocks (9).

6. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 5, characterized in that: The prestressed steel cable assembly comprises steel cable structures respectively mounted on two steel cable positioning blocks (9), with a steel cable connection structure connected between the two steel cable structures.

7. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 6, characterized in that: The steel cable structure comprises a first steel cable anchor (12) connected to a steel cable positioning block (9), a second steel cable anchor (132) connected to a steel cable connection structure, and a prestressed first prestressed steel cable (131) connecting the first steel cable anchor (12) and the second steel cable anchor (132).

8. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 6, characterized in that: The steel cable connection structure comprises a connection block (133) respectively connected to two second steel cable anchors (132), the connection block (133) comprising a C-shaped outer frame and a bent portion bent vertically inward, the C-shaped outer frames of the two connection blocks (133) are spliced ​​together to form an annular outer frame, and the bent portions of the two connection blocks (133) are spliced ​​together to form a connecting rod connecting two opposite sides of the annular outer frame.

9. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 8, characterized in that: The butting surfaces of the two bent portions are both provided with hemispherical grooves (134), and rotatable hemispherical shafts (136) are both installed in the two hemispherical grooves (134). A transmission rod (137) is also installed on the hemispherical shaft (136), which obliquely penetrates the side surface of the bent portion and extends outward. The outer end of the transmission rod (137) is also connected to a damper (138), and the other end of the damper (138) is connected to an adjusting screw (139) installed on the C-shaped outer frame; the adjusting screw (139) is parallel to the bent portion, and the penetration length of the adjusting screw (139) in the C-shaped outer frame is adjustable.

10. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 9, characterized in that: The bent portion is also provided with a movable groove (135) for the transmission rod (137) to swing.

11. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 8, characterized in that: Protective covers (23) are also provided on both sides of the two connecting blocks (133).

12. The eccentrically restrained buckling braced steel frame system with prestressed cables according to any one of claims 1 to 11, characterized in that: The energy-absorbing beam assembly comprises two channel steels (14) arranged back to back, the two ends of the channel steels (14) being fixed to the horizontal beam (1) by bolts, and the middle parts of the webs of the two channel steels (14) are provided with a plurality of annular cast irons (16) spaced apart along the axial direction thereof.

13. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 12, wherein: An energy-absorbing beam section stiffening rib (15) is also connected between the two flanges of the channel steel (14), and both sides of the energy-absorbing beam section stiffening rib (15) are welded to the annular cast iron (16).

14. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 12, wherein: The web of the channel steel (14) is also provided with a fourth node plate (17) at both ends.

15. The eccentrically restrained buckling braced steel frame system with prestressed cables according to claim 12, wherein: The flanges of the two channel steels (14) are further provided with opposite L-shaped connecting steel plates (18), and the two opposite L-shaped connecting steel plates (18) are connected by bolts.

16. The eccentrically restrained buckling braced steel frame system with prestressed cables according to any one of claims 1 to 11, characterized in that: The vertical support frame comprises a vertical support steel section (2), the web of which is provided with transverse stiffening ribs (19) spaced apart along its axial direction, and a second prestressed steel cable (20) is installed through the plurality of transverse stiffening ribs (19).

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