A multi-stage shear energy dissipation steel plate shear wall

Abstract

The present invention relates to a multi-stage shear energy-absorbing steel plate shear wall, comprising at least a first energy-absorbing member (10), a restraining member (30), and a second energy-absorbing member (20); the first energy-absorbing member (10) is used to connect a top frame beam (100) of a layer, the second energy-absorbing member (20) is used to connect a bottom frame beam (200) of a layer, the shear strength of the first energy-absorbing member (10) is weaker than that of the second energy-absorbing member (20); the restraining member (30) is used to restrain out-of-plane buckling of the first energy-absorbing member (10) and the second energy-absorbing member (20); and under a first shear strength, the first energy-absorbing member (10) can generate a first relative sliding relative to the restraining member (30) in the transverse direction, and under a second shear strength, the restraining member (30) can generate a second relative sliding relative to the second energy-absorbing member (20) in the transverse direction. The present invention provides a multi-stage shear energy-absorbing steel plate shear wall, which can realize multi-stage shear energy absorption under different earthquake actions.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering structures, in particular to a shear wall structure, and in particular to a multi-stage shear energy-absorbing steel plate shear wall. Background Art

[0002] As buildings continue to increase in height and size, higher demands are placed on their seismic performance. Steel plate shear walls, as highly effective lateral force-resisting components, are widely used in modern architecture due to their excellent bearing capacity and high lateral stiffness. However, traditional steel plate shear walls are prone to problems such as providing stiffness without dissipating energy during minor earthquakes, and experiencing out-of-plane buckling, large residual deformations, and structural collapse due to a sudden drop in stiffness during major earthquakes, resulting in severe economic losses.

[0003] To address these issues, researchers have conducted extensive research on improving steel plate shear walls. For example, stiffening ribs have been used to enhance the out-of-plane stiffness of steel plate shear walls, or energy-absorbing elements have been incorporated into the walls to improve their energy dissipation capacity. However, existing energy-absorbing steel plate shear walls still have some shortcomings: some structural designs are complex, increasing the difficulty of processing and installation; in addition, their high cost limits their widespread application in practical projects. Therefore, there is an urgent need for a multi-stage energy-absorbing steel plate shear wall with a simple structure, easy assembly, and reliable performance to meet the seismic performance and economic requirements of modern buildings. Summary of the Invention

[0004] To address these challenges, the present invention provides a multi-stage shear energy dissipation steel plate shear wall, capable of achieving multiple levels of shear energy dissipation under different earthquake conditions. Furthermore, in practical design, the short and long slots can be adjusted to meet the inter-story deformation requirements of the structure under performance-based seismic design, while ensuring that the maximum deformation of the energy dissipation plate does not exceed the design safety value, effectively reducing the risk of damage and failure of the energy dissipation plate.

[0005] The technical solutions of the present invention are as follows:

[0006] A multi-stage shear energy-absorbing steel plate shear wall comprises at least a first energy-absorbing member, a restraining member, and a second energy-absorbing member connected in a transverse sliding manner;

[0007] The first energy-absorbing component is used to connect the top frame beams of the main structure of the building, and the second energy-absorbing component is used to connect the bottom frame beams of the main structure of the building, and the shear strength of the first energy-absorbing component is weaker than that of the second energy-absorbing component;

[0008] The restraining member is used to restrain out-of-plane buckling of the first energy absorbing member and the second energy absorbing member;

[0009] Furthermore, under a first shear strength, the first energy-absorbing member can generate a first relative sliding relative to the constraining member in the lateral direction, and under a second shear strength, the constraining member can generate a second relative sliding relative to the second energy-absorbing member in the lateral direction, and the second shear strength is stronger than the first shear strength, and the second sliding stroke of the second relative sliding is greater than the first sliding stroke of the first relative sliding.

[0010] In this embodiment, the first energy absorbing member generates a first relative sliding, and the restraining member generates a second relative sliding, so as to realize multi-level shear energy dissipation under different earthquake actions.

[0011] Preferably, the first energy absorbing component and the second energy absorbing component are arranged in sequence in the up-down direction, the top of the first energy absorbing component is welded and fixed to the top frame beam of the layer, the bottom of the second energy absorbing component is welded and fixed to the bottom frame beam of the layer, and the restraint component is fixed to both sides of the first energy absorbing component and the second energy absorbing component by bolt connection.

[0012] Preferably, the first energy absorbing member includes a first connecting plate and a first shear energy absorbing plate, wherein the horizontal surface of the first connecting plate is welded to the top frame beam, and the vertical surface is provided with a plurality of round bolt holes, which are connected to the first shear energy absorbing plate through first bolts.

[0013] Preferably, the first shear energy dissipation plate is a steel plate with a relatively large cross-sectional weakening, which is used for shear energy dissipation under the first shear strength. A row of first circular bolt holes are respectively provided on the top and bottom of the first shear energy dissipation plate, which are respectively used for bolt connection with the first connecting plate and the restraining member, and a row of short slot holes is provided below the row of first circular bolt holes on the top of the first shear energy dissipation plate, which is used for sliding connection with the restraining member.

[0014] Preferably, the second energy absorbing member includes a second connecting plate and a second shear energy absorbing plate, wherein the horizontal surface of the second connecting plate is welded to the bottom frame beam, and the vertical surface is provided with a plurality of round bolt holes, which are connected to the second shear energy absorbing plate through second bolts.

[0015] Preferably, the second shear energy dissipation plate is a steel plate with less cross-sectional weakening, which is used for shear energy dissipation under the second shear strength. A row of second circular bolt holes are respectively provided on the top and bottom of the second shear energy dissipation plate, which are respectively used for bolt connection with the second connecting plate and the restraining member, and a row of long slot holes is provided above the row of second circular bolt holes at the bottom of the second shear energy dissipation plate, which is used for sliding connection with the restraining member.

[0016] Preferably, the restraining member includes two restraining outer plates and a plurality of third bolts, and the two restraining outer plates are respectively installed on both sides of the first shear energy dissipation plate and the second shear energy dissipation plate through the third bolts.

[0017] Preferably, the two constraint outer plates have a row of top short slots corresponding to the row of short slots on the top of the first shear energy dissipation plate, a row of bottom long slots corresponding to the row of long slots on the bottom of the second shear energy dissipation plate, and two rows of third round bolt holes corresponding to the first round bolt holes on the bottom of the first shear energy dissipation plate and the second round bolt holes on the top of the second shear energy dissipation plate at the middle.

[0018] Some of the third bolts pass through the short slots and long slots on the two constraint outer plates, the first shear energy dissipation plate and the second shear energy dissipation plate to achieve sliding connection, and some of the third bolts pass through the round bolt holes to achieve fixed connection.

[0019] Preferably, each of the restraining outer plates includes a rectangular vertical plate and a plurality of vertical stiffening ribs perpendicular to the rectangular vertical plate.

[0020] Preferably, the first connecting plate includes two fishtail plates, a plurality of fishtail stiffening ribs are arranged at intervals on the fishtail plates, and circular bolt holes are opened between adjacent fishtail stiffening ribs. The two fishtail plates are mirror-symmetrical from both sides and are connected to the first shear energy dissipation plate through first bolts; the second connecting plate has the same structure.

[0021] Preferably, the first shear energy dissipation plate is an I-shaped steel plate with a relatively large cross-sectional weakening; and the second shear energy dissipation plate is an I-shaped steel plate with a relatively small cross-sectional weakening.

[0022] The present invention has the following advantages over the prior art: The present invention provides a multi-stage shear energy dissipation steel plate shear wall. When an earthquake causes a horizontal force to be applied to the structure, causing relative displacement of internal components, if the horizontal force is relatively low, meaning the displacement effect on the structure does not reach the value controlled by the short slots, the first and second energy dissipation components can deform freely due to the action of the restraining member and are both in an elastic state (segment OA). As the earthquake action increases, if the displacement effect on the structure is within the value controlled by the short slots, the first shear energy dissipation plate with a relatively weaker cross-section will shear-yield first, dissipating small earthquake energy until it reaches the value controlled by the short slots (segment AB). If the horizontal force is relatively large, meaning the displacement effect on the structure exceeds the value controlled by the short slots, the second shear energy dissipation plate with a relatively stronger cross-section will become the primary elastic deforming member and begin to cooperate with the first shear energy dissipation plate in force and energy dissipation (segment BC). After the second shear energy dissipation plate yields, it primarily dissipates large earthquake energy and controls the design value of the inter-story displacement of the structure under large earthquakes through the long slots (segment CD). In the event of a rare earthquake, the structure still maintains good bearing capacity (after point D) and exhibits excellent ductility. By controlling the size of energy-absorbing components and the length of slots, the structure can effectively achieve multi-level energy absorption capacity and deformation control capabilities under earthquake action, achieving controllable deformation and excellent ductility, meeting performance-based design requirements.

[0023] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, provided they do not affect the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0026] Figure 1 This is a schematic diagram of the overall structure of a multi-stage shear energy dissipation steel plate shear wall according to one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the decomposed structure of a multi-stage shear energy dissipation steel plate shear wall according to one embodiment of the present invention;

[0028] Figure 3 This is a front view of the assembly of the first connecting plate, the second connecting plate, and the restraining outer plate according to one embodiment of the present invention;

[0029] Figure 4 This is a perspective view of the assembly of the first connecting plate, the second connecting plate, and the restraining outer plate according to one embodiment of the present invention;

[0030] Figure 5 This is a schematic structural diagram of a first connecting plate (second connecting plate) according to an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the relative positional relationship among the first shear energy dissipation plate, the second shear energy dissipation plate, and the restraining outer plate according to one embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the constrained outer plate structure according to one embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the assembly structure of the first shear energy dissipation plate, the second shear energy dissipation plate, and the restraining outer plate according to one embodiment of the present invention;

[0034] Figure 9A schematic diagram of a multi-stage shear energy loss mechanical curve (theoretical skeleton curve) according to an embodiment of the present invention;

[0035] Figure 10 Schematic diagram of a multi-stage shear loss mechanical curve (numerical simulation curve) according to one embodiment of the present invention.

[0036] Description of reference numerals:

[0037] The top frame beam is 100, and the bottom frame beam is 200;

[0038] A first energy absorbing component 10, a second energy absorbing component 20, and a restraining component 30;

[0039] First connecting plate 11, first shear energy dissipation plate 12, first bolt 13, fish plate 111, fishtail stiffening rib 112, short slot hole 14, first round bolt hole 15;

[0040] Second connecting plate 21, second shear energy dissipation plate 22, second bolt 23, long slotted hole 24, second round bolt hole 25;

[0041] Constraint outer plate 31 , third bolt 32 , top short slot hole 34 - 1 , bottom long slot hole 34 - 2 , third round bolt hole 35 , rectangular vertical plate 311 , vertical stiffening rib 312 .

[0042] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0044] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] It should be understood that the terms "comprises / comprising," "consisting of," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product, apparatus, process, or method that includes a list of elements includes not only those elements but also, if necessary, other elements not explicitly listed, or elements inherent to such product, apparatus, process, or method. In the absence of further limitations, elements defined by the phrases "comprises / comprising," "consisting of," do not preclude the presence of additional identical elements in the product, apparatus, process, or method that includes the elements.

[0046] It should also be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and should not be understood as limiting the present invention.

[0047] 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 identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0048] The implementation of the present invention is described in detail below in conjunction with preferred embodiments.

[0049] like Figure 1-2 FIG. 1 shows a multi-stage shear energy-absorbing steel plate shear wall according to an embodiment of the present invention, which comprises at least a first energy-absorbing member 10, a restraining member 30, and a second energy-absorbing member 20 that can be slidably connected in the transverse direction. That is, under the shear action of external forces such as earthquakes, the first energy-absorbing member 10 and the restraining member 30, as well as the restraining member 30 and the second energy-absorbing member 20, can generate lateral movement in stages, thereby realizing multi-stage shear energy absorption.

[0050] Specifically, the main structure of the building (for example, a steel frame-steel plate shear wall structure) has a top frame beam 100 and a bottom frame beam 200. The first energy absorption component 10 is used to connect the top frame beam 100 of the main structure of the building, and the second energy absorption component 20 is used to connect the bottom frame beam 200 of the main structure of the building. The first energy absorption component 10 and the second energy absorption component 20 form a steel plate shear wall between the top frame beam 100 and the bottom frame beam 200, providing shear energy dissipation between the top frame beam 100 and the bottom frame beam 200; the restraint component 30 is used to restrain out-of-plane buckling of the first energy absorption component 10 and the second energy absorption component 20.

[0051] In the present invention, the shear strength of the first energy absorbing member 10 is weaker than that of the second energy absorbing member 20. It is easy to understand that under the action of transverse shear, the first energy absorbing member 10 shear-yields before the second energy absorbing member 20. Under the first shear strength, the first energy absorbing member 10 can produce a first relative sliding relative to the restraining member 30 in the transverse direction. Under the second shear strength, the restraining member 30 can produce a second relative sliding relative to the second energy absorbing member 20 in the transverse direction. Moreover, the second shear strength is stronger than the first shear strength, and the second sliding stroke of the second relative sliding is greater than the first sliding stroke of the first relative sliding, thereby realizing multi-stage shear energy dissipation.

[0052] In a specific embodiment, if Figure 1 、 Figure 2 As shown, the first energy absorbing member 10 and the second energy absorbing member 20 are arranged in sequence in the vertical direction. The top of the first energy absorbing member 10 is welded and fixed to the top frame beam 100, and the bottom of the second energy absorbing member 20 is welded and fixed to the bottom frame beam 200. The restraint member 30 is fixed to both sides of the first energy absorbing member 10 and the second energy absorbing member 20 by bolt connection to restrain out-of-plane buckling.

[0053] In a specific embodiment, if Figure 3 、 Figure 4 As shown, the first energy dissipation member 10 includes a first connecting plate 11 and a first shear energy dissipation plate 12. The first connecting plate 11 is vertically arranged, with its horizontal surface (i.e., upper edge) welded to the top frame beam 100. A plurality of circular bolt holes are provided on its vertical surface, which are connected to the first shear energy dissipation plate 12 via first bolts 13. Specifically, according to relevant regulations, the first connecting plate 11 and the first shear energy dissipation plate 12 are fixed with bolts, the top of the first shear energy dissipation plate 12 is connected to the first connecting plate 11 with a fillet weld, and the horizontal surface of the first connecting plate 11 is butt-welded to the frame beam.

[0054] In a specific embodiment, if Figure 5 As shown, the first connecting plate 11 includes two fishplates 111. It is easy to understand that the fishplate is a fishtail-type stiffening plate, which is shown in a triangular shape in the figure. A plurality of fishtail stiffening ribs 112 are arranged at intervals on the fishplate 111, and circular bolt holes are opened between adjacent fishtail stiffening ribs 112. The two fishplates 111 are mirror-symmetrical from both sides and are connected to the first shear energy dissipation plate 12 through the first bolts 13.

[0055] By using fishplates for connection, the internal forces are reliably transmitted to the wall panels, and the connection nodes are strengthened by setting stiffening ribs. In addition, the installation can adapt to larger errors that may occur during processing, and the requirements for processing accuracy are greatly reduced. While saving costs, it also provides great convenience for the installation of unitized energy-absorbing steel plate shear walls at any stage of construction.

[0056] In a specific embodiment, if Figure 6 As shown, the first shear energy dissipation plate 12 is made of a steel plate, and the steel plate is weakened in a large amount in section to form a relatively low shear strength for dissipating shear energy at a low first shear strength.

[0057] A row of first circular bolt holes 15 are respectively provided at the top and bottom of the first shear energy dissipation plate 12, which are used for bolting with the first connecting plate 11 and the restraining member 30, and a row of short slot holes 14 are provided below the row of first circular bolt holes 15 at the top of the first shear energy dissipation plate 12, which are used for sliding connection with the restraining member 30.

[0058] The second energy absorbing member 20 is arranged below the first energy absorbing member 10 and is mirror-symmetrical with the first energy absorbing member 10. Similar to the first energy absorbing member 10, the second energy absorbing member 20 includes a second connecting plate 21 and a second shear energy absorbing plate 22. The horizontal surface of the second connecting plate 21 is welded to the floor frame beam 200, and the vertical surface is provided with a plurality of round bolt holes, which are connected to the second shear energy absorbing plate 22 through second bolts 23. Figure 2 shown.

[0059] The second connecting plate 21 adopts the same structure as the first connecting plate 11, that is, it includes two fishtail plates, a plurality of fishtail stiffening ribs are arranged at intervals on the fishtail plates, and circular bolt holes are opened between adjacent fishtail stiffening ribs. The two fishtail plates are connected to the second shear energy dissipation plate 22 from both sides in a mirror-symmetrical manner through second bolts 23.

[0060] Different from the first shear energy dissipation plate 12 , the second shear energy dissipation plate 22 is a steel plate with less cross-sectional weakening, and can provide relatively higher shear strength than the first shear energy dissipation plate 12 , for shear energy dissipation at a higher second shear strength.

[0061] Similarly, a row of second circular bolt holes 25 are provided at the top and bottom of the second shear energy dissipation plate 22, respectively, for bolting to the second connecting plate 21 and the restraining member 30, and a row of long slot holes 24 are provided above the row of second circular bolt holes 25 at the bottom of the second shear energy dissipation plate 22, for sliding connection to the restraining member 30.

[0062] In a specific embodiment, if Figure 6 、 7 As shown in Figures 8 and 9, the restraining member 30 includes two restraining outer plates 31 and a plurality of third bolts 32. The two restraining outer plates 31 are respectively mounted on both sides of the first shear energy dissipation plate 12 and the second shear energy dissipation plate 22 via the third bolts 32. The two restraining outer plates 31 provide restraint from both sides, preventing out-of-plane buckling of the first shear energy dissipation plate 12 and the second shear energy dissipation plate 22 during shear energy dissipation.

[0063] Specifically, a row of corresponding top short slot holes 34-1 is provided on the top of the two constraint outer plates 31, and the number, position and size of the top short slot holes 34-1 correspond to the row of short slot holes 14 on the top of the first shear energy dissipation plate 12; a row of corresponding bottom long slot holes 34-2 is provided on the bottom, and the number, position and size of the bottom long slot holes 34-2 correspond to the row of long slot holes 24 on the bottom of the second shear energy dissipation plate 22; two rows of third circular bolt holes 35 are provided in the middle, and the number, position and size of the third circular bolt holes 35 correspond to the first circular bolt holes 15 at the bottom of the first shear energy dissipation plate 12 and the second circular bolt holes 25 on the top of the second shear energy dissipation plate 22.

[0064] See especially Figure 6 , a portion of the third bolts 32 passes through a row of top short slots 34-1 at the top of the two side constraint outer plates 31 and a row of short slots 14 at the top of the first shear energy dissipation plate 12, and the two side constraint outer plates 31 are slidably connected to the first shear energy dissipation plate 12 at the top position, and a portion of the third bolts 32 passes through a row of third round bolt holes 35 in the middle of the two side constraint outer plates 31 and a row of first round bolt holes 15 at the bottom of the first shear energy dissipation plate 12, and the two side constraint outer plates 31 are fixedly connected to the first shear energy dissipation plate 12 at the middle position. After assembly, Figure 8 shown.

[0065] Similarly, a portion of the third bolts 32 passes through a row of bottom long slot holes 34-2 at the bottom of the two side constraint outer plates 31 and a row of long slot holes 24 at the bottom of the second shear energy dissipation plate 22, and the two side constraint outer plates 31 are slidably connected to the second shear energy dissipation plate 22 at the bottom position. A portion of the third bolts 32 passes through a row of third round bolt holes 35 in the middle of the two side constraint outer plates 31 and a row of second round bolt holes 25 at the top of the second shear energy dissipation plate 22, and the two side constraint outer plates 31 are fixedly connected to the second shear energy dissipation plate 22 at the middle position. After assembly, Figure 8 shown.

[0066] This design not only effectively constrains the first and second shear energy dissipation panels 12, 22 within the structure by the restraining outer panels 31 on both sides, but also provides effective shear energy dissipation under shear forces such as earthquakes. Furthermore, the upper first shear energy dissipation panel 12 exhibits a greater cross-sectional weakening and is simultaneously connected to the top of the restraining outer panel 31 via a short slot, providing primary shear energy dissipation. The lower second shear energy dissipation panel 22 exhibits a lesser cross-sectional weakening and is simultaneously connected to the bottom of the restraining outer panel 31 via a long slot, providing secondary shear energy dissipation. This achieves multi-stage shear energy dissipation, effectively addressing damage from minor, moderate, and even major earthquakes, and meeting the requirements of performance-based seismic design. Furthermore, three energy dissipation panels, each consisting of weak, medium, and strong, can be further arranged to achieve even more levels of energy dissipation.

[0067] In addition, the design lengths of short and long slots can be used to control the staged displacement of the structure. Under strong earthquakes, the long slots can be used to control the inter-story displacement: (1) to meet the requirements of performance-based design for inter-story displacement; and (2) to prevent the shear energy dissipation plate from excessive deformation and failure.

[0068] In addition, by Figure 8 It is easy to see that after such assembly, the top of the first shear energy dissipation plate 12 and the bottom of the second shear energy dissipation plate 22 are exposed, and the first round bolt holes 15 in the top row and the second round bolt holes 25 in the bottom row are exposed, so as to connect and fix the first connecting plate 11 and the second connecting plate 21. Figure 4 shown.

[0069] Continue to see Figure 6 The first shear energy dissipation plate 12 is an I-shaped steel plate with a significant cross-sectional weakening. Specifically, the first shear energy dissipation plate 12 is a rectangular or square steel plate with arc-shaped weakening on both sides, forming an I-shaped steel plate. Similarly, the second shear energy dissipation plate 22 is an I-shaped steel plate with a less significant cross-sectional weakening. Of course, the first and second shear energy dissipation plates 12, 22 can also be weakened by providing one or more vertical grooves in the middle of the plates, or by other suitable methods.

[0070] Continue to see Figure 7 The constraint outer plate 31 adopts a rectangular plate structure. Each constraint outer plate 31 includes a rectangular vertical plate 311 and a plurality of vertical stiffening ribs 312 perpendicular to the rectangular vertical plate to strengthen the constraint effect and prevent out-of-plane buckling.

[0071] The multi-stage shearing energy-dissipating steel plate shear wall provided by the embodiment of the present invention can be divided into four working stages. Its theoretical skeleton curve is as follows: Figure 9 As shown in the numerical simulation curve Figure 10 As shown in the figure, the solid line segment OAB represents the first energy dissipation stage, and the dashed line segment BCD represents the second energy dissipation stage. Point A represents the yield point of the first energy dissipation component, point B represents the maximum allowable deformation of the first energy dissipation component, point C represents the yield point of the second energy dissipation component, and point D represents the maximum design deformation. This curve fully demonstrates the dual-stage load-dissipation mechanical characteristics of this structure.

[0072] In the numerical simulation, the total height of the multi-stage shear energy dissipation steel plate shear wall is 3100 mm and the width is 1500 mm. A 100 mm gap is reserved between the upper and lower shear energy dissipation plates. The first shear energy dissipation plate 12 adopts an I-shaped section with a size of 1500 × 1500 × 250 × 500 mm, and the second shear energy dissipation plate 22 adopts an I-shaped section with a size of 1500 × 1500 × 250 × 750 mm, both with a thickness of 8 mm. The restraining outer plates 31 on both sides adopt a rectangular section with a thickness of 2800 × 1500 mm and a thickness of 16 mm. Both are made of Q235 steel. In performance-based seismic design, the requirement is that the interstory drift angle of the structure be 0.5% during minor earthquakes and 2% during major earthquakes. Therefore, the short slot length can be controlled to 2 × 3100 × 0.005 = 31 mm, and the long slot length to 2 × 3100 × 0.02 - 31 = 93 mm. Specifically, a short slot length of 31 mm corresponds to contact between the bolts and the edge of the short slot (point B) when the structure pushes over to a 0.5% interstory drift angle. A long slot length of 93 mm corresponds to contact between the bolts and the edge of the long slot (point D) when the structure pushes over to a 2.0% interstory drift angle. After the curve ends at the second energy dissipation stage (point D), the structure enters a state where the energy dissipation and restraint components work together, causing the curve to continue its upward trend. In practical applications, the design displacement under major earthquakes can be controlled to point D.

[0073] Through the above theoretical explanation and numerical simulation verification, it is easy to understand that when the structural system is subjected to a small earthquake and undergoes lateral displacement, the first and second energy-absorbing components can deform freely due to the action of the restraining member. As the seismic action increases, the first energy-absorbing component 10 enters plastic yielding until the first bolt 13 slides in the short slot and stops against the edge of the short slot. At this point, the first energy-absorbing stage is completed and the second energy-absorbing stage begins. The load is transmitted from the top of the first energy-absorbing component 10 via the first bolt 13 to the restraining member 30, and then from the restraining member 30 to the second energy-absorbing component 20 via the third bolt 32. As the load further increases, the second energy-absorbing component 20 gradually enters yielding and reaches strengthening. Finally, the second bolt 23 presses against the edge of the long slot, and the structure reaches the maximum design displacement. In addition, by controlling the size of the energy-absorbing components and the slot length, the structure can effectively achieve multi-level energy-absorbing capacity and deformation control capabilities under earthquake action, achieving controllable deformation and energy dissipation.

[0074] While various embodiments of the present invention have been described above, the foregoing descriptions are exemplary, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations, individually or in any suitable combination. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A multi-stage shear energy dissipation steel plate shear wall, characterized in that: At least comprising a first energy-absorbing member (10), a second energy-absorbing member (20), and a restraining member (30) connected in a transverse sliding manner; The first energy-absorbing member (10) is used to connect the top frame beams (100) of the main structure of the building, and the second energy-absorbing member (20) is used to connect the bottom frame beams (200) of the main structure of the building, and the shear strength of the first energy-absorbing member (10) is weaker than that of the second energy-absorbing member (20); wherein the first energy-absorbing member (10) includes a first shear energy-absorbing plate (12), the first shear energy-absorbing plate (12) is a steel plate with a relatively large cross-section weakening, and is used for shear energy dissipation under a first shear strength, and the second energy-absorbing member (20) includes a second shear energy-absorbing plate (22), the second shear energy-absorbing plate (22) is a steel plate with a relatively small cross-section weakening, and is used for shear energy dissipation under a second shear strength; The restraining member (30) is used to restrain the out-of-plane buckling of the first energy dissipation member (10) and the second energy dissipation member (20); Furthermore, under a first shear strength, the first energy-absorbing member (10) can generate a first relative sliding relative to the constraining member (30) in the lateral direction, and under a second shear strength, the constraining member (30) can generate a second relative sliding relative to the second energy-absorbing member (20) in the lateral direction, and the second shear strength is stronger than the first shear strength, and the second sliding stroke of the second relative sliding is greater than the first sliding stroke of the first relative sliding.

2. The shear wall according to claim 1, characterized in that: The first energy absorbing member (10) and the second energy absorbing member (20) are arranged in sequence in an upper and lower direction, the top of the first energy absorbing member (10) is welded and fixed to the top frame beam, the bottom of the second energy absorbing member (20) is welded and fixed to the bottom frame beam, and the restraining member (30) is fixed to both sides of the first energy absorbing member (10) and the second energy absorbing member (20) by bolt connection.

3. The shear wall according to claim 2, characterized in that: The first energy dissipation component (10) further comprises a first connecting plate (11), the horizontal surface of the first connecting plate (11) being welded to the top frame beam, and the vertical surface of the first connecting plate (11) being provided with a plurality of round bolt holes and connected to the first shear energy dissipation plate (12) via first bolts (13).

4. The shear wall according to claim 3, characterized in that: A row of first circular bolt holes (15) is provided at the top and bottom of the first shear energy dissipation plate (12), respectively, for bolting to the first connecting plate (11) and the restraining member (30), and a row of short slot holes (14) is provided below the row of first circular bolt holes (15) at the top of the first shear energy dissipation plate (12), for sliding connection to the restraining member (30).

5. The shear wall according to claim 3, characterized in that: The second energy dissipation member (20) further comprises a second connecting plate (21), the horizontal surface of the second connecting plate (21) being welded to the floor bottom frame beam, and the vertical surface of the second connecting plate (21) being provided with a plurality of round bolt holes and connected to the second shear energy dissipation plate (22) via second bolts (23).

6. The shear wall according to claim 5, characterized in that: A row of second circular bolt holes (25) is provided at the top and bottom of the second shear energy dissipation plate (22), respectively, for bolting to the second connecting plate (21) and the restraining member (30), and a row of long slotted holes (24) is provided above the row of second circular bolt holes (25) at the bottom of the second shear energy dissipation plate (22), for sliding connection to the restraining member (30).

7. The shear wall according to claim 4 or 6, characterized in that: The restraining member (30) comprises two restraining outer plates (31) and a plurality of third bolts (32), and the two restraining outer plates (31) are respectively mounted on both sides of the first shear energy dissipation plate (12) and the second shear energy dissipation plate (22) via the third bolts (32).

8. The shear wall according to claim 7, characterized in that: The two constraint outer plates (31) are provided with a row of top short slot holes (34-1) corresponding to the row of short slot holes (14) at the top of the first shear energy dissipation plate (12), a row of bottom long slot holes (34-2) corresponding to the row of long slot holes (24) at the bottom of the second shear energy dissipation plate (22), and two rows of third round bolt holes (35) corresponding to the first round bolt holes (15) at the bottom of the first shear energy dissipation plate (12) and the second round bolt holes (25) at the top of the second shear energy dissipation plate (22) are provided in the middle. Some of the third bolts (32) pass through the short slot holes and the long slot holes on the two constraint outer plates (31), the first shear energy dissipation plate (12), and the second shear energy dissipation plate (22) to achieve sliding connection, and some of the third bolts (32) pass through the round bolt holes to achieve fixed connection.

9. The shear wall according to claim 7, characterized in that: Each of the restraining outer plates (31) comprises a rectangular vertical plate (311) and a plurality of vertical stiffening ribs (312) perpendicular to the rectangular vertical plate.

10. The shear wall according to claim 5, characterized in that: The first connecting plate (11) comprises two fishtail plates (111), a plurality of fishtail stiffening ribs (112) are arranged at intervals on the fishtail plates (111), and circular bolt holes are provided between adjacent fishtail stiffening ribs (112). The two fishtail plates (111) are connected to the first shear energy dissipation plate (12) from both sides in a mirror-symmetrical manner through first bolts (13); the second connecting plate (21) has the same structure; The first shear energy dissipation plate (12) is an I-shaped steel plate with a relatively large cross-sectional weakening; the second shear energy dissipation plate (22) is an I-shaped steel plate with a relatively small cross-sectional weakening.

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