Shear wall with additional memory alloy sliding friction damper and construction method

Abstract

The invention relates to the field of constructional engineering, and discloses a shear wall with additional memory alloy sliding friction dampers and a construction method.The shear wall comprises a wall body and a plurality of sliding friction dampers, the wall body comprises a wall body frame and a covering panel, the wall body frame is connected to the periphery of the covering panel, and in a working state, the sliding friction dampers are arranged on the wall body frame; the wall body is connected to one side of the building foundation; the two ends of the sliding friction damper are connected to the two ends of the wall frame correspondingly so as to consume external force borne by the building foundation. The construction method is implemented based on the shear wall of the additional memory alloy sliding friction damper. The building foundation has the beneficial effects that through coordinated work of the sliding friction damper and the covering plate, when an earthquake or other external force is encountered, the sliding friction damper and the covering plate cooperatively consume the external force borne by the building foundation, bearing capacity reduction and rigidity degradation of a wall body at a peak point are delayed, and the displacement ductility and the anti-seismic dissipation capacity of the structure are improved.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to a shear wall with an additional memory alloy sliding friction damper and a construction method. Background Art

[0002] Cold-formed steel structures, a novel structural system developed in the 1990s, are currently primarily used in low-rise buildings. Compared to traditional structural systems, cold-formed steel structures offer significant advantages, including lightweight, high strength, rapid construction, high degree of industrialization, and energy-saving and environmentally friendly features. These advantages are highly beneficial for promoting the industrialization, standardization, and prefabrication of my country's construction industry. Therefore, the development of multi-story cold-formed steel buildings not only meets the demands of modern construction for efficiency, environmental protection, and cost-effectiveness, but also closely aligns with my country's current national conditions and urban development trends.

[0003] At present, the strength and stiffness of existing shear walls decrease rapidly after the peak point, and the structural ductility and deformation capacity are poor, making them unable to be used in high-intensity earthquake areas and multi-story buildings. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the strength and stiffness of existing shear walls decrease rapidly after the peak point, and the structural ductility and deformation capacity are poor. The purpose is to provide a shear wall with an additional memory alloy sliding friction damper and a construction method. The sliding friction damper and the covering panel work in coordination so that when encountering an earthquake or other external force, the sliding friction damper and the covering panel coordinately consume the external force exerted on the building foundation, delaying the decrease in the wall's bearing capacity and stiffness degradation at the peak point, and improving the structure's displacement ductility and seismic dissipation capacity.

[0005] The present invention is achieved through the following technical solutions: A shear wall with an additional memory alloy sliding friction damper comprises a wall body and a plurality of sliding friction dampers. The wall body comprises a wall frame and a covering panel. The wall frame is connected to the outer periphery of the covering panel. In a working state, the wall body is connected to one side of a building foundation. The two ends of the sliding friction damper are respectively connected to the two ends of the wall frame to dissipate the external force exerted on the building foundation.

[0006] The beneficial effect of the present invention is that, by connecting the shear wall to one side of the building foundation and arranging a wall frame on the outer periphery of the shear wall covering panel, the two ends of the sliding friction damper are respectively connected to the two ends of the wall frame, so that during operation, the sliding friction damper and the covering panel can coordinate with each other. When encountering an earthquake or other external force, the external force exerted on the building foundation can be consumed by the sliding friction damper and the covering panel, delaying the decrease in the bearing capacity and stiffness degradation of the wall at the peak point, improving the displacement ductility and seismic dissipation capacity of the structure, and reducing structural damage and economic losses caused by earthquakes or external forces.

[0007] In some embodiments, the wall frame includes guide rails and side columns. The guide rails are connected to both ends of the cladding panels, and the side columns are connected to both sides of the cladding panels. The guide rails are connected to the building foundation via multiple shear bolts. The cold-formed steel frame keel system formed by connecting the side columns to the guide rails ensures the strength of the shear wall. Multiple shear bolts are also used to connect the guide rails to the building foundation, ensuring strength and rigidity at the connection points.

[0008] In some embodiments, the wall frame further comprises a center column, the two ends of which are respectively connected to the middle of the corresponding guide rails. By arranging the center column in the middle of the length direction of the wall frame, the strength and rigidity of the wall frame are generally improved.

[0009] In some embodiments, the system further includes several pull-out members having an N-shaped cross-section. These members are connected to the four corners of the wall frame or the connection between the center column and the guide rail. Each pull-out member is connected to the side columns or center column via several high-strength bolts. The N-shaped cross-section of the pull-out members improves their strength and rigidity. The pull-out members are then connected to the four corners of the wall frame via high-strength bolts, thereby increasing the strength and rigidity of the connection points between the pull-out members and the wall frame.

[0010] In some embodiments, two sliding friction dampers are connected to the same wall, with their ends connected to the pullout member at the top of the center column and the pullout member at the inner corner of the bottom of the wall frame, respectively, to form a herringbone damping structure. By connecting the ends of the sliding friction damper to the pullout members connected to the wall frame, the connection strength between the damper and the wall frame is ensured. The herringbone shape of the two dampers improves the building foundation's ability to resist lateral loads, thereby enhancing the displacement ductility and seismic resistance of the structural system.

[0011] In some embodiments, the two ends of the sliding friction damper are respectively connected to the anti-pullout member, and the two ends of the sliding friction damper are respectively located at opposite corners of the wall frame. The central column is formed by connecting two C-shaped steels with curled edges. The web of the central column is provided with a through hole for the corresponding sliding friction damper to pass through. By connecting the two ends of the dynamic friction damper to the opposite corners of the wall frame, the lateral load of the building foundation is dissipated or absorbed, thereby improving the displacement ductility and seismic resistance of the structural system.

[0012] In some embodiments, the sliding friction damper includes two sliding structures and two cover plates. The two sliding structures are slidably connected between the two cover plates and can slide at both ends of the space between the two cover plates. The inner sides of the two cover plates are provided with friction plates at the points of contact with the corresponding sliding structures. The friction plates are located between the cover plates and the corresponding sliding structures. The sliding structures and the cover plates are connected by shape memory alloy bolts. By slidably connecting the two sliding structures between the two cover plates and providing friction plates at the points of contact with the corresponding sliding structures on the inner sides of the cover plates, when the building foundation is subjected to a lateral load, the two sliding structures slide between the two cover plates and generate friction with the corresponding friction plates. The tensile load generated by the shape memory alloy bolts dissipates the lateral load on the building foundation through friction and tensile load, thereby improving the displacement ductility and seismic resistance of the structural system.

[0013] In some embodiments, the sliding structure includes a slider and a supporting connecting member, and a sliding portion is provided on the top and bottom of the slider, and the sliding portion includes a first planar portion and a first arc-shaped inclined portion, and the first arc-shaped inclined portion is located on both sides of the corresponding first planar portion, and the inner ends of the cover plate are provided with a second planar portion and a second arc-shaped inclined portion that cooperate with the sliding portion, and a splint slide is provided on the sliding portion, and the splint slide extends along the length direction of the sliding portion, and the shape memory alloy bolt can slide along the splint slide. By arranging a flat portion and an arc-shaped inclined portion on the slider to cooperate with the inner structure of the cover plate, a splint slide extending along the length direction of the slider is also arranged on the sliding portion, so that in the initial state, that is, the first stage, the shape memory alloy bolt is located in the flat portion, and the shape memory alloy bolt does not slide relative to each other. At this time, the load on the sliding friction damper is less than the maximum friction force, and the length of the shape memory alloy bolt remains unchanged during the movement of the flat section, so the friction force applied remains unchanged. At this time, the flat section friction serves as the main energy dissipation mechanism. At this stage, the friction damper only participates in the force-bearing work but does not play an energy dissipation role; in the second stage, that is, the inclined section state, after the shape memory alloy bolt enters the inclined section, the overall length of the shape memory alloy bolt will increase as the relative sliding distance increases, thereby causing the friction force of the sliding friction damper to continue to increase during the inclined section. The inclined section friction serves as the main energy dissipation mechanism. At this stage, the friction damper both participates in the force-bearing work and plays an energy dissipation role to varying degrees, consuming the lateral load on the building foundation to improve the displacement ductility and seismic resistance of the structural system.

[0014] In some embodiments, the support connection member includes a turnbuckle, a support rod, and a rod-end bearing. The turnbuckle is connected at both ends to the end of the slider away from the sliding portion and the support rod, respectively. The support rod is provided with a rod-end bearing mounted on the end away from the turnbuckle, which is connected to a roller bolt on the anti-pullout member. To facilitate fine-tuning the length of the support connection member by rotating the turnbuckle and reduce installation difficulty, a rod-end bearing is further provided at the end of the support rod away from the turnbuckle, connected to a roller bolt on the anti-pullout member, to prevent the damper from generating additional rotational stiffness when subjected to lateral loads on the wall.

[0015] A construction method for a shear wall with an additional memory alloy sliding friction damper is implemented based on the shear wall with the additional memory alloy sliding friction damper, comprising the following steps: S1. Place a clamping plate between two cover plates and align their flat surfaces. Then, insert shape memory alloy bolts through the reserved holes in the cover plates and the reserved slideways in the clamping plates. Adjust the preload of the shape memory alloy bolts to change the friction and restoring forces of the damper. Ensure that the force applied to each shape memory alloy bolt on the same sliding friction damper is consistent. S2. Connect the end of the supporting connection member away from the sliding portion to the anti-pullout member, and during the installation process, the cover plate of the sliding friction damper is parallel to the side wall of the building foundation; S3. Connect different types of cladding panels to the outer peripheral flanges of corresponding wall frames according to actual construction project requirements; S4. Anchor the guide rail to the building foundation through the shear bolts located at the bottom of the pull-out member. By setting the initial state of the sliding friction damper so that the two cover plates are aligned with the flat portions of the corresponding sliders, it is ensured that in this state the sliding friction damper only participates in force-bearing work but does not play an energy-dissipating role, and the force state of each shape memory alloy bolt on the sliding friction damper is consistent at this time, thereby ensuring uniform positive pressure distribution on the friction contact surface, avoiding local stress concentration, stabilizing the damping force output, reducing nonlinear fluctuations, and ensuring that it can work in conjunction with the shape memory alloy bolts to exert adaptive adjustment capabilities and improve the consistency and repeatability of the damper performance; during the installation process, the cover plate of the sliding friction damper is parallel to the side wall of the building foundation so that the normal direction of the friction surface is consistent with the normal direction of the foundation side wall, ensuring that the relative displacement generated by the structural vibration can be completely converted into "positive sliding" of the friction surface, so that the lateral load is dissipated through friction, avoiding "directional loss" in the energy transfer process, and ensuring that the energy consumption efficiency meets the design expectations. It is also convenient to quickly detect wear of the friction surface and attenuation of the bolt preload through symmetrical detection, facilitating timely adjustment and replacement of components, and ensuring the long-term stable performance of the damper.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The sliding friction damper and the cladding work in coordination so that when encountering an earthquake or other external force, the sliding friction damper and the cladding can coordinately consume the external force exerted on the building foundation, delaying the decline in the peak bearing capacity and stiffness degradation of the wall, and improving the displacement ductility and seismic dissipation capacity of the structure.

[0017] 2. A two-stage sliding friction damper is set up so that in the first stage, the shape memory alloy bolt is located in the flat section and does not slip relative to the shape memory alloy bolt. At this time, the load on the sliding friction damper is less than the maximum friction force. The length of the shape memory alloy bolt remains unchanged during the movement of the flat section, so the friction force applied remains unchanged. At this time, the flat section friction serves as the main energy dissipation mechanism. In this stage, the friction damper only participates in the force-bearing work but does not play an energy dissipation role. In the second stage, that is, the inclined section state, after the shape memory alloy bolt enters the inclined section, the overall length of the shape memory alloy bolt will increase with the increase of the relative sliding distance, resulting in the friction force of the sliding friction damper continuing to increase during the inclined section. The inclined section friction serves as the main energy dissipation mechanism. In this stage, the friction damper not only participates in the force-bearing work but also plays an energy dissipation role to varying degrees, consuming the lateral load on the building foundation, thereby improving the displacement ductility and seismic resistance of the structural system.

[0018] 3. The sliding friction damper uses shape memory alloy bolts and friction plates, combining the self-resetting ability of smart materials with the shock-absorbing performance of friction energy dissipation. It has a simple structure. When encountering a strong earthquake that exceeds the limit, it is relatively easy to dismantle and replace some damaged components without affecting the work of adjacent walls, which minimizes the subsequent maintenance costs of the invention.

[0019] 4. The sliding friction damper only participates in the load-bearing work but does not play an energy dissipation role in the elastic stage of the corrugated steel plate clad shear wall; in the elastic-plastic stage and the pre- and post-destruction stages, it participates in the load-bearing work and plays an energy dissipation role to varying degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings: Figure 1 This is a schematic structural diagram of the sliding friction damper of the present invention when it is installed diagonally; Figure 2 For the present invention Figure 1 Exploded diagram; Figure 3It is a partial structural diagram of the present invention; Figure 4 An exploded view of the side column in the present invention; Figure 5 This is an exploded view of the center column in the present invention; Figure 6 is a structural diagram of the sliding friction damper of the present invention; Figure 7 For the present invention Figure 6 Exploded diagram; Figure 8 It is a partial structural diagram of the present invention; Figure 9 It is a partial structural diagram of the present invention; Figure 10 This is a schematic structural diagram of the sliding friction damper of the present invention when it is installed in a herringbone pattern; Figure 11 For the present invention Figure 10 Exploded diagram.

[0021] Markings and corresponding parts names in the accompanying drawings: 1-sliding friction damper, 1a-shape memory alloy bolt, 1b-high-strength nut, 1c-slider, 10c first flat portion, 10a first arc-shaped inclined portion, 1d-cover plate, 1e-stiffening rib, 1f-friction plate, 1g-extension rod, 1h-plywood slide, 2-side column, 2a-C-shaped steel, 3-center column, 3a-local web opening steel, 3b-local reinforcement connector, 4-guide rail, 5-covering plate, 6-pull-out member, 7-shear bolt, 8-roller bolt, 9-first self-tapping screw, 10-second self-tapping screw, 11-support connection member, 11a-support rod, 11b-rod end bearing, 11c-basket bolt, 12-high-strength bolt, 13-frame keel. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0023] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Therefore, appearances of the phrases "one embodiment," "an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combinations and / or subcombinations. Furthermore, it will be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes only and are not necessarily drawn to scale. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] In the description of the present invention, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0025] The terms "first" and "second" used in the present invention are only used to distinguish corresponding components for the sake of clarity of description and are not intended to limit any order or emphasize importance. In addition, the term "connected" used in this article can refer to direct connection or indirect connection via other components unless otherwise specified.

[0026] Example 1 like Figures 1-9 As shown, this embodiment 1 provides a shear wall with an additional memory alloy sliding friction damper 1, comprising a wall body and a plurality of sliding friction dampers 1. The wall body comprises a wall frame and a cladding panel 5. The wall frame is connected to the outer periphery of the cladding panel 5. In the working state, the wall body is connected to one side of the building foundation. The two ends of the sliding friction damper 1 are respectively connected to the two ends of the wall frame to dissipate the external force exerted on the building foundation. This facilitates the coordinated operation of the sliding friction damper 1 and the cladding panel 5 during operation. When encountering an earthquake or other external force, the sliding friction damper 1 and the cladding panel 5 dissipate the external force exerted on the building foundation, delaying the decline in the wall's bearing capacity and stiffness degradation at the peak point, improving the displacement ductility and seismic dissipation capacity of the structure, and reducing structural damage and economic losses caused by earthquakes or external forces.

[0027] See also Figure 2-Figure 5The cladding panels 5 of the present invention are constructed from corrugated steel, folded lattice steel, and channel steel stiffeners. Taking the corrugated steel as an example, the folds of the corrugated steel are arranged along the width of the wall. Due to the presence of cross-sectional folds, the panels possess high rigidity and shear strength. Furthermore, the cold-formed steel structure system employing corrugated steel as the cladding panels 5 is non-flammable, making this novel cladding panel 5 a preferred option for promoting cold-formed steel structures in multi-story residential buildings. The troughs are connected to the flanges of the side columns 2 and center columns 3 using first self-tapping screws 9.

[0028] See also Figure 2-Figure 5 The wall frame includes guide rails 4 and side columns 2. The guide rails 4 are connected to both ends of the cladding panels 5, and the side columns 2 are connected to both sides of the cladding panels 5. The guide rails 4 are connected to the building foundation via a number of shear bolts 7. The cold-formed steel frame keel 13 system is formed by connecting the side columns 2 and the guide rails 4 to ensure the strength of the shear wall. The guide rails 4 are also connected to the building foundation via a number of shear bolts 7 to ensure the strength and rigidity of the connection points.

[0029] See also Figure 2 Specifically, the side columns 2 and center columns 3 of the present invention are each constructed from two C-shaped steel sections 2a with curled edges connected back-to-back with self-tapping screws. The guide rail 4 is a single C-shaped steel section 2a without curled edges. Shear bolts 7 are inserted through the reserved circular holes at the bottom of the guide rail 4 and the pull-out member 6. They connect the cold-bent steel section 2a wall to the building foundation or upper and lower floor slabs, allowing the novel wall and the overall structure to jointly resist lateral loads. The center column 3 is a partially open-web section steel section 3a.

[0030] See also Figure 2 and Figure 4 The wall frame also includes a central column 3, each end of which is connected to the middle of a corresponding guide rail 4. Positioning the central column 3 in the middle of the wall frame's length generally improves the strength and rigidity of the wall frame. The central column 3 is provided with a localized reinforcing connector 3b, located around the periphery of the through-hole, to increase the strength and rigidity of the through-hole.

[0031] See also Figure 2 and Figure 8, also includes several anti-pull-out members 6, the cross-section of the anti-pull-out members 6 is n-shaped, the anti-pull-out members 6 are respectively connected to the four corners of the wall frame or the connection between the central column 3 and the guide rail 4, and the anti-pull-out members 6 are connected to the side columns 2 or the central column 3 by several high-strength bolts 12 and several second self-tapping screws 10. By setting the cross-section of the anti-pull-out member 6 to be n-shaped, the strength and rigidity of the anti-pull-out member 6 are improved, and then the anti-pull-out member 6 is connected to the four corners of the wall frame by high-strength bolts to improve the strength and rigidity of the connection point between the anti-pull-out member 6 and the wall frame. It also includes a high-strength nut 1b, which is screwed on the high-strength bolt to fit the anti-pull-out member 6 to the wall frame.

[0032] See also Figure 1 and Figure 2 The two ends of the sliding friction damper 1 are connected to the anti-pullout member 6 and are located at opposite corners of the wall frame. The center column 3 is composed of two connected C-shaped steels 2a with curled edges. The web of the center column 3 is provided with through-holes for the corresponding sliding friction damper 1 to pass through. By connecting the two ends of the dynamic friction damper to the opposite corners of the wall frame, the lateral load of the building foundation is dissipated or absorbed, improving the displacement ductility and seismic resistance of the structural system.

[0033] See also Figure 6 and Figure 7 The sliding friction damper 1 includes two sliding structures and two cover plates 1d. The two sliding structures are slidably connected between the two cover plates 1d and can slide at both ends of the space between the two cover plates 1d. Friction plates 1f are provided on the inner sides of the two cover plates 1d at the points of contact with the corresponding sliding structures. The friction plates 1f are located between the cover plates 1d and the corresponding sliding structures. The sliding structures and the cover plates 1d are connected by shape memory alloy bolts 1a. By slidably connecting the two sliding structures between the two cover plates 1d and providing friction plates 1f on the inner sides of the cover plates 1d at the points of contact with the corresponding sliding structures, when the building foundation is subjected to a lateral load, the two sliding structures slide between the two cover plates 1d and generate friction with the corresponding friction plates 1f. The tensile load generated by the shape memory alloy bolts 1a dissipates the lateral load on the building foundation through friction and tensile load, thereby improving the displacement ductility and seismic resistance of the structural system.

[0034] The friction plate 1f in the present invention is a carbon fiber friction plate, a ceramic composite friction plate 1f and a steel-based friction plate 1f. The present invention preferably uses a carbon fiber friction plate to take advantage of its high strength, light weight and high temperature resistance.

[0035] See also Figure 6 and Figure 7The sliding structure includes a slider 1c and a supporting connecting member 11. The top and bottom of the slider 1c are both provided with sliding parts. The sliding part includes a first planar part 10c and a first arc-shaped inclined part 10a. The first arc-shaped inclined part 10a is located on both sides of the corresponding first planar part 10c. The inner ends of the cover plate 1d are both provided with a second planar part and a second arc-shaped inclined part that match the sliding part. A splint slide 1h is provided on the sliding part. The splint slide 1h extends along the length direction of the sliding part. The shape memory alloy bolt 1a can slide along the splint slide 1h to constitute a shape memory alloy-two-stage sliding friction damper 1. By arranging a flat portion and an arc-shaped inclined portion on the slider 1c to cooperate with the inner structure of the cover plate 1d, a clamping slide 1h extending along the length direction of the slider 1c is also arranged on the sliding portion, so that in the initial state, that is, in the first stage, the shape memory alloy bolt 1a is located on the flat portion, and the shape memory alloy bolt 1a does not slide relatively. At this time, the load on the sliding friction damper 1 is less than the maximum friction force. The length of the shape memory alloy bolt 1a remains unchanged during the movement of the flat section, so the friction force applied remains unchanged. At this time, the friction of the flat section serves as the main consumption. Energy mechanism, at this stage the friction damper only participates in the force-bearing work but does not play an energy-consuming role; in the second stage, that is, the inclined section state, after the shape memory alloy bolt 1a enters the inclined section, the overall length of the shape memory alloy bolt 1a will increase with the increase of the relative sliding distance, thereby causing the friction force of the sliding friction damper 1 to continue to increase during the inclined section. The inclined section friction serves as the main energy-consuming mechanism. At this stage, the friction damper not only participates in the force-bearing work but also plays an energy-consuming role to varying degrees, consuming the lateral load on the building foundation to improve the displacement ductility and seismic resistance of the structural system.

[0036] See also Figure 6 and Figure 7 The sliding friction damper 1 also includes a stiffening rib 1e and an extension rod 1g. The stiffening rib 1e is located at the end of the slider 1c away from the friction plate 1f. The extension rod 1g is connected to the end of the stiffening rib 1e away from the slider 1c. The extension rod 1g is connected to the end of the basket bolt 11c away from the support rod 11a.

[0037] See also Figure 6 and Figure 7The supporting connection member 11 includes a turnbuckle 11c, a support rod 11a, and a rod-end bearing 11b. The ends of the turnbuckle 11c are respectively connected to the end of the slider 1c away from the sliding portion and the support rod 11a. The end of the support rod 11a away from the turnbuckle 11c is mounted with a rod-end bearing 11b, which is connected to the roller bolt 8 on the anti-pullout member 6. To facilitate fine adjustment of the length of the supporting connection member 11 by rotating the turnbuckle 11c and reduce installation difficulty, a rod-end bearing 11b is also provided at the end of the support rod 11a away from the turnbuckle 11c, connected to the roller bolt 8 on the anti-pullout member 6, to prevent the damper from generating additional rotational stiffness when the wall is subjected to lateral loads.

[0038] Example 2 See also Figure 10 and Figure 11 The difference between Example 2 and Example 1 lies in that two sliding friction dampers 1 are connected to the same wall. The ends of each sliding friction damper 1 are connected to the pullout member 6 at the top of the center column 3 and the pullout member 6 at the bottom inner corner of the wall frame, respectively, to form a herringbone damping structure. By connecting the ends of the sliding friction damper 1 to the pullout members 6 connected to the wall frame, the connection strength between the damper and the wall frame is ensured. The herringbone shape of the two dampers improves the building foundation's ability to resist lateral loads, thereby enhancing the displacement ductility and seismic resistance of the structural system.

[0039] Example 3 This embodiment 3 provides a construction method for a shear wall with an additional memory alloy sliding friction damper 1. The construction method is based on the shear wall with the additional memory alloy sliding friction damper 1 and includes the following steps: S1. Place the clamping plate between the two cover plates 1d and align their flat surfaces. Then, insert the shape memory alloy bolts 1a through the reserved holes in the cover plates 1d and the reserved slideways in the clamping plates. Adjust the preload force of the shape memory alloy bolts 1a to change the friction and restoring force of the damper. The force state of each shape memory alloy bolt 1a on the same sliding friction damper 1 is consistent. S2. Connect the end of the supporting connecting member 11 away from the sliding portion to the anti-pullout member 6. During the installation process, the cover plate 1d of the sliding friction damper 1 is parallel to the side wall of the building foundation; S3. Connect different types of covering panels 5 to the outer peripheral flanges of the corresponding wall frames according to actual construction project requirements; S4. Anchor the guide rail 4 to the building foundation through the shear bolts 7 located at the bottom of the pull-out member 6. By setting the initial state of the sliding friction damper 1 so that the two cover plates 1d are aligned with the plane parts of the corresponding sliders 1c, it is ensured that in this state the sliding friction damper 1 only participates in the force-bearing work but does not play an energy-consuming role, and the force state of each shape memory alloy bolt 1a on the sliding friction damper 1 is consistent at this time, so as to ensure that the positive pressure of the friction contact surface is evenly distributed, avoid local stress concentration, stabilize the damping force output, reduce nonlinear fluctuations, and ensure that it can work in conjunction with the shape memory alloy bolt 1a to exert adaptive adjustment capabilities and improve the consistency of damper performance. and repeatability; during the installation process, the cover plate 1d of the sliding friction damper 1 is parallel to the side wall of the building foundation, so that the normal direction of the friction surface is consistent with the normal direction of the foundation side wall, ensuring that the relative displacement generated by the structural vibration can be completely converted into "positive sliding" of the friction surface, so that the lateral load is dissipated through friction, avoiding "directional loss" in the process of energy transfer, ensuring that the energy consumption efficiency meets the design expectations, and also facilitating the rapid detection of friction surface wear, bolt preload attenuation, etc. through symmetrical detection, facilitating timely adjustment and replacement of components, and ensuring the long-term stability of the damper performance.

[0040] The other steps include selecting the steel material and cross-sectional parameters of the anti-pullout connector of the frame keel 13 according to the actual engineering design module requirements, and determining the specifications, spacing and margins of the self-tapping screws and high-strength bolts 12; The components are also preliminarily processed, and then the side columns 2 and the center columns 3 are spliced ​​into a combined section using self-tapping screws, and the holes for shear bolts 7 are pre-drilled on the web of the guide rail 4 and the bottom of the pull-out member 6; Use self-tapping screws to splice the side columns 2, center columns 3 and guide rails 4 into a cold-formed steel frame keel system. At the same time, anchor the pull-out connectors to the four corner nodes of the wall frame. At the same time, determine the diagonal pull-out connectors 6 for installing the damper, and insert roller bolts 8 into the reserved holes on both sides of them. The positioning and welding of the shape memory alloy-two-stage sliding friction damper 1 and the supporting and connecting component 11 (including the splint, stiffening ribs 1e, support rods 11a, rod end bearings 11b, threaded support rods 11a, etc.), the bonding of the friction plate 1f and the anti-corrosion and fireproofing treatment are completed in a factory environment.

[0041] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shear wall with an additional memory alloy sliding friction damper, characterized in that: include: A wall, comprising a wall frame and a covering panel, wherein the wall frame is connected to the outer periphery of the covering panel, and in a working state, the wall is connected to one side of the building foundation; A plurality of sliding friction dampers are provided, with both ends of the sliding friction dampers being connected to both ends of the wall frame respectively, so as to consume the external force exerted on the building foundation.

2. The shear wall with additional memory alloy sliding friction damper according to claim 1, characterized in that: The wall frame includes guide rails and side columns. The guide rails are connected to both ends of the covering panel, and the side columns are connected to both sides of the covering panel. The guide rails are connected to the building foundation through a plurality of shear bolts.

3. The shear wall with additional memory alloy sliding friction damper according to claim 2, characterized in that: The wall frame further comprises a central column, both ends of which are respectively connected to the middle of the corresponding guide rails.

4. The shear wall with additional memory alloy sliding friction damper according to claim 3, characterized in that: It also includes several anti-pull-out parts, the cross-section of which is N-shaped. The anti-pull-out parts are respectively connected to the four corners of the wall frame or the connection between the central column and the guide rail. The anti-pull-out parts are connected to the side columns or central columns through several high-strength bolts.

5. The shear wall with additional memory alloy sliding friction damper according to claim 3, characterized in that: Two sliding friction dampers are connected to the same wall, and the two ends of the sliding friction damper are respectively connected to the anti-pullout piece at the top of the central column and the anti-pullout piece at the bottom inner corner of the wall frame to form a herringbone damping structure.

6. The shear wall with additional memory alloy sliding friction damper according to claim 4, characterized in that: The two ends of the sliding friction damper are respectively connected to the anti-pull-out parts, and the two ends of the sliding friction damper are respectively located at the diagonal corners of the wall frame. The central column is composed of two C-shaped steels with curled edges connected together, and a through hole is provided on the web of the central column, and the through hole is for the corresponding sliding friction damper to pass through.

7. The shear wall with additional memory alloy sliding friction damper according to claim 1, characterized in that: The sliding friction damper includes two sliding structures and two cover plates. The two sliding structures are slidably connected between the two cover plates and can slide at both ends of the space between the two cover plates. Friction plates are provided on the inner sides of the two cover plates at the contact points with the corresponding sliding structures. The sliding structure and the cover plates are connected by shape memory alloy bolts.

8. The shear wall with additional memory alloy sliding friction damper according to claim 7, characterized in that: The sliding structure includes a slider and a supporting connecting member, and a sliding part is provided at the top and bottom of the slider, and the sliding part includes a first planar part and a first arc-shaped inclined part, and the first arc-shaped inclined part is located on both sides of the corresponding first planar part, and the inner ends of the cover plate are provided with a second planar part and a second arc-shaped inclined part that match the sliding part, and a splint slide is provided on the sliding part, and the splint slide extends along the length direction of the sliding part, and the shape memory alloy bolt can slide along the splint slide.

9. The shear wall with additional memory alloy sliding friction damper according to claim 8, characterized in that: The supporting and connecting component includes a basket bolt, a support rod and a rod end bearing. The two ends of the basket bolt are respectively connected to the end of the slider away from the sliding part and the support rod. The end of the support rod away from the basket bolt is installed with a rod end bearing, and the rod end bearing is connected to the roller bolt on the anti-pull-out member.

10. A construction method for a shear wall with an additional memory alloy sliding friction damper, characterized in that: The shear wall implementation of the additional memory alloy sliding friction damper according to any one of claims 1 to 9 comprises the following steps: S1. Place a clamping plate between two cover plates and align their flat surfaces. Then, insert shape memory alloy bolts through the reserved holes in the cover plates and the reserved slideways in the clamping plates. Adjust the preload of the shape memory alloy bolts to change the friction and restoring forces of the damper. Ensure that the force applied to each shape memory alloy bolt on the same sliding friction damper is consistent. S2. Connect the end of the supporting connection member away from the sliding portion to the anti-pullout member, and during the installation process, the cover plate of the sliding friction damper is parallel to the side wall of the building foundation; S3. Connect different types of cladding panels to the outer peripheral flanges of corresponding wall frames according to actual construction project requirements; S4. Anchor the guide rail to the building foundation through the shear bolts located at the bottom of the pull-out member.

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