Prefabricated shear damper with shape-optimized staged yielding energy dissipation mechanism

Abstract

The present invention discloses an assembled shear-type damper with a shape-optimized staged yield energy dissipation mechanism, comprising: an in-plane deformation energy dissipation sheet, an out-of-plane deformation energy dissipation sheet, a first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are arranged in parallel, and the in-plane deformation energy dissipation sheet and the out-of-plane deformation energy dissipation sheet are fixedly arranged between the first connecting plate and the second connecting plate; wherein the in-plane deformation energy dissipation sheet is provided with a plurality of through holes in an array in the length direction, and the through holes are a structure that gradually converges from the middle to the two ends, and its two ends are respectively facing the first connecting plate and the second connecting plate, and two out-of-plane deformation energy dissipation sheets symmetrical with respect to the in-plane deformation energy dissipation sheet are provided in the middle portion of two adjacent through holes, and a reserved gap exists between the out-of-plane deformation energy dissipation sheet and the in-plane deformation energy dissipation sheet. The beneficial effect of the present invention is that by optimizing the edge shape of the in-plane deformation energy dissipation sheet and the out-of-plane deformation energy dissipation sheet of the damper, the stress distribution is more uniform and the ductility is better.

Description

Technical Field

[0001] The present invention relates to the technical field of structural engineering earthquake resistance, and more particularly to an assembled shear damper with a shape-optimized staged yielding energy dissipation mechanism. Background Art

[0002] Previous earthquake disasters have shown that buildings can be damaged in major earthquakes, resulting in severe casualties and property losses. Consequently, energy dissipation and vibration reduction technologies have developed rapidly in recent years. By attaching dampers to structural components, they undergo plastic deformation before the main structure under earthquake action, absorbing significant seismic energy and significantly reducing damage. However, most shear-type metal dampers suffer from insufficient energy dissipation capacity, insufficient ductility, and a single energy dissipation method.

[0003] Therefore, how to provide an assembled shear damper with good energy dissipation performance, good ductility, and diverse energy dissipation forms, and with a shape-optimized staged yield energy dissipation mechanism is an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides an assembled shear damper with a shape-optimized staged yield energy dissipation mechanism, aiming to overcome the above-mentioned defects.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An assembled shear damper with a shape-optimized staged yield energy dissipation mechanism comprises: an in-plane deformation energy dissipation sheet, an out-of-plane deformation energy dissipation sheet, a first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are arranged in parallel, and the in-plane deformation energy dissipation sheet and the out-of-plane deformation energy dissipation sheet are fixedly arranged between the first connecting plate and the second connecting plate;

[0007] In which, the in-plane deformation energy dissipation sheet is provided with a plurality of through holes in an array in the length direction. The through holes are a structure that gradually converges from the middle to the two ends, and the two ends face the first connecting plate and the second connecting plate respectively. Two out-of-plane deformation energy dissipation sheets symmetrical with respect to the in-plane deformation energy dissipation sheet are provided in the middle part of two adjacent through holes, and a reserved gap is provided between the out-of-plane deformation energy dissipation sheet and the in-plane deformation energy dissipation sheet.

[0008] Furthermore, the contour line of the through hole is an envelope line constructed by a first contour line constructed when the normal stress generated by the bending moment is equal to the yield stress and a second contour line constructed when the shear stress generated by the shear force is equal to the yield stress.

[0009] Furthermore, the first connecting plate and the second connecting plate are both provided with a plurality of assembly holes, and the plurality of assembly holes are used to install the first connecting plate and the second connecting plate on the support beam.

[0010] Furthermore, a pre-embedded connecting steel plate for connecting to the first connecting plate and the second connecting plate is provided on the surface of the support beam, and the pre-embedded connecting steel plate is fixed to the surface of the support beam by a plurality of anchors pre-embedded in the support beam, and threaded holes corresponding to the assembly holes are provided on the pre-embedded connecting steel plate, and the first connecting plate and the second connecting plate are fixed to the pre-embedded connecting steel plate by bolts.

[0011] Furthermore, the surfaces of the in-plane deformation energy dissipation sheet, the out-of-plane deformation energy dissipation sheet, the first connecting plate and the second connecting plate are all provided with an antioxidant layer.

[0012] Through the above technical solution, it can be known that compared with the prior art, the present invention discloses an assembled shear-type damper with a shape-optimized staged yield energy dissipation mechanism. The contour line passing through the through hole is an envelope constructed by the first contour line constructed when the normal stress generated by the bending moment is equal to the yield stress and the second contour line constructed when the shear stress generated by the shear force is equal to the yield stress. The edge shape of the in-plane deformation energy dissipation sheet and the out-of-plane deformation energy dissipation sheet of the damper is optimized, so that the stress distribution is more uniform and the ductility is better; by having a reserved gap between the out-of-plane deformation energy dissipation sheet and the in-plane deformation energy dissipation sheet, the out-of-plane deformation energy dissipation sheet can limit the buckling of the in-plane deformation energy dissipation sheet, effectively ensuring the damper. The performance of the damper is improved by utilizing the energy dissipation capability of in-plane plastic deformation; the first connecting plate and the second connecting plate are connected to the embedded connecting steel plate by means of bolt assembly, which makes replacement simple and realizes the replaceability of the energy dissipation section of the energy dissipation connecting beam, which not only reduces costs but also has the function of rapid restoration of use after an earthquake; by utilizing the large yield displacement of the out-of-plane deformation energy dissipation plate, it fully dissipates energy under medium and large earthquake conditions and only provides necessary stiffness under small earthquake conditions; at the same time, all materials involved in the present invention are metals and have good durability after treatment; the present invention has a simple form, a clear mechanical mechanism and stable mechanical properties; the present invention is applicable to high-rise buildings and has obvious effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order 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 use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0014] Figure 1 The accompanying drawing is a schematic structural diagram of an assembled shear damper with a shape-optimized staged yield energy dissipation mechanism provided by the present invention;

[0015] Figure 2The accompanying drawing is a schematic structural diagram of the damper provided by the present invention being assembled on a support beam;

[0016] Figure 3 The accompanying drawing is a schematic structural diagram of the in-plane deformation energy dissipation sheet provided by the present invention;

[0017] Figure 4 The accompanying drawings are schematic diagrams of the first and second connecting plates provided by the present invention;

[0018] Figure 5 The accompanying drawing is a schematic structural diagram of the out-of-plane deformation energy dissipation sheet provided by the present invention;

[0019] Figure 6 The accompanying drawing is a schematic structural diagram of the embedded connecting steel plate provided by the present invention;

[0020] Figure 7 The accompanying drawing is a schematic structural diagram of Example 2 provided by the present invention;

[0021] Figure 8 The accompanying drawing is a schematic structural diagram of Example 3 provided by the present invention;

[0022] Figure 9 The accompanying drawing is a schematic structural diagram of Example 4 provided by the present invention.

[0023] Among them: 1 is the in-plane deformation energy dissipation sheet; 2 is the out-of-plane deformation energy dissipation sheet; 3 is the first connecting plate; 4 is the second connecting plate; 5 is the through hole; 6 is the reserved gap; 7 is the assembly hole; 8 is the support beam; 9 is the embedded connecting steel plate; 10 is the anchor; 11 is the threaded hole; 12 is the upper frame beam; 13 is the concrete connecting pier; 14 is the lower frame beam; 15 is the connecting support; 16 is the infill wall. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1

[0026] See attached Figure 1-6 An embodiment of the present invention discloses an assembled shear damper with a shape-optimized staged yield energy dissipation mechanism, comprising: an in-plane deformation energy dissipation sheet 1, an out-of-plane deformation energy dissipation sheet 2, a first connecting plate 3 and a second connecting plate 4. The first connecting plate 3 and the second connecting plate 4 are arranged in parallel, and the in-plane deformation energy dissipation sheet 1 and the out-of-plane deformation energy dissipation sheet 2 are fixed between the first connecting plate 3 and the second connecting plate 4 by welding.

[0027] Among them, the in-plane deformation energy dissipation sheet 1 is provided with a plurality of through holes 5 in an array in the length direction. The through holes 5 are a structure that gradually converges from the middle to the two ends, and its two ends face the first connecting plate 3 and the second connecting plate 4 respectively. The middle part of two adjacent through holes 5 is provided with two out-of-plane deformation energy dissipation sheets 2 symmetrical with respect to the in-plane deformation energy dissipation sheet 1. The out-of-plane deformation energy dissipation sheet 2 is perpendicular to the in-plane deformation energy dissipation sheet 1, and a reserved gap 6 is provided between the out-of-plane deformation energy dissipation sheet 2 and the in-plane deformation energy dissipation sheet 1. The setting of the reserved gap 6 can prevent the in-plane deformation energy dissipation sheet 1 from buckling out of the plane when working in the shear direction, and at the same time can provide out-of-plane stiffness, effectively ensuring the ability of the damper to utilize in-plane plastic deformation to dissipate energy, and improving the performance of the damper.

[0028] In this embodiment, the contour line of the through hole 5 is a first contour line constructed when the normal stress generated by the bending moment is equal to the yield stress and a second contour line constructed when the shear stress generated by the shear force is equal to the yield stress. Then, the envelope line constructed by the first contour line and the second contour line is the contour line of the through hole 5. Preferably, for the in-plane deformation energy dissipation sheet 1, the shape optimization based on the mechanics principle is used to make its energy consumption uniform. The contour line of the area controlled by bending and the contour line of the area controlled by shear are calculated by material mechanics, and the envelope lines of the two are taken and appropriately chamfered as the edge contour line shape of the through hole 5; in addition, the cross-sectional stiffness and the bending moment of the out-of-plane deformation energy dissipation sheet 2 change uniformly along the height direction, that is, the optimized shape of the out-of-plane deformation energy dissipation sheet 2. By adjusting the width of the out-of-plane deformation energy dissipation sheet 2 to resist the bending stress of the cross section at different heights, it is driven by the shear displacement and enters the yield state simultaneously along the outer contour, with more uniform stress distribution and better ductility.

[0029] Specifically, the first connecting plate 3 and the second connecting plate 4 are both provided with a plurality of assembly holes 7, and the plurality of assembly holes 7 are used to install the first connecting plate 3 and the second connecting plate 4 on the support beam 8. The surface of the support beam 8 is provided with an embedded connecting steel plate 9 for connecting with the first connecting plate 3 and the second connecting plate 4. The embedded connecting steel plate 9 is fixed to the surface of the support beam 8 by a plurality of anchors 10 embedded in the support beam 8. The embedded connecting steel plate 9 is provided with threaded holes 11 corresponding to the assembly holes 7. The first connecting plate 3 and the second connecting plate 4 are fixed to the embedded connecting steel plate 9 by bolts. The first connecting plate 3 and the second connecting plate 4 are both connected to the embedded connecting steel plate 9 by a bolt assembly connection method, which makes replacement simple and realizes the replaceability of the energy consuming section of the energy dissipation connecting beam, which not only reduces costs but also has the function of rapid restoration of use after an earthquake.

[0030] In this embodiment, antioxidant layers are formed on the surfaces of the in-plane deformation energy dissipation sheet 1 , the out-of-plane deformation energy dissipation sheet 2 , the first connecting plate 3 and the second connecting plate 4 by spraying antioxidants to prevent the steel from rusting.

[0031] Example 2

[0032] See attached Figure 7 , the assembled shear damper with the optimized shape and staged yield energy dissipation mechanism is assembled between the layers of the frame structure, and the displacement between the layers during an earthquake is used to drive the damper to work and dissipate energy. Specifically, the first connecting plate 3 is fixedly connected to the embedded connecting steel plate 9 below the upper frame beam 12 by bolts, and the second connecting plate 4 is connected to the embedded connecting steel plate 9 fixed on the concrete connecting pier 13 by bolts. The concrete connecting pier 13 is located above the lower frame beam 14. The concrete connecting pier 13 and the lower frame beam 14 are cast as one piece. The concrete connecting pier 13 has sufficient bearing capacity and initial stiffness to avoid quitting work before the damper yields. Among them, the fixing method of the embedded connecting steel plate 9 to the bottom of the upper frame beam 12 and to the concrete connecting pier 13 is the same as the method of fixing the embedded connecting steel plate 9 to the support beam 8 in Example 1, which will not be repeated here.

[0033] Example 3

[0034] See attached Figure 8 The first connecting plate 3 in the assembled shear damper of the shape-optimized staged yield energy dissipation mechanism is fixedly connected to the embedded connecting steel plate 9 below the upper frame beam 12 by bolts. Two connecting supports 15 are provided between the upper frame beam 12 and the lower frame beam 14. The two connecting supports 15 are arranged in a V-shape. The lower end of the connecting support 15 is fixed to the connection between the lower frame beam 14 and the vertical frame. The upper ends of the two connecting supports 15 intersect and are fixedly connected, and the intersection is connected to the assembly of the shape-optimized staged yield energy dissipation mechanism. The second connecting plate 4 in the shear damper is fixedly connected by bolts, and a filling wall 16 is arranged in the gap between the upper frame beam 12 and the lower frame beam 14. The connecting support 15 adopts a steel structure, and the connecting support 15 reinforces the filling wall 16. When an earthquake occurs, the assembled shear damper with optimized shape and staged yield energy dissipation mechanism starts to work. The interlayer shear displacement causes the filling wall 16 to be full of cracks. The connecting support 15 effectively restrains the rupture behavior of the filling wall 16, preventing the collapse of non-structural components from causing harm to people.

[0035] Example 4

[0036] See attached Figure 9, a plurality of assembled shear dampers with optimized shape and staged yield energy dissipation mechanism are arranged in parallel between the upper frame beam 12 and the lower frame beam 14. Specifically, the first connecting plate 3 is fixedly connected to the embedded connecting steel plate 9 below the upper frame beam 12 by bolts, and the second connecting plate 4 is connected to the embedded connecting steel plate 9 fixed on the concrete connecting pier 13 by bolts. The concrete connecting pier 13 is located above the lower frame beam 14, and the concrete connecting pier 13 and the lower frame beam 14 are cast as one piece. In this embodiment, two assembled shear dampers with optimized shape and staged yield energy dissipation mechanism are arranged in parallel between the upper frame beam 12 and the lower frame beam 14. When an earthquake or wind vibration occurs, shear relative displacement occurs between the layers of the frame structure, and the in-plane shear hysteresis mechanism of the energy absorber is used to dissipate energy.

[0037] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0038] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The assembled shear damper with shape-optimized staged yield energy dissipation mechanism is characterized by: include: An in-plane deformation energy dissipation sheet (1), an out-of-plane deformation energy dissipation sheet (2), a first connecting plate (3) and a second connecting plate (4), wherein the first connecting plate (3) and the second connecting plate (4) are arranged in parallel, and the in-plane deformation energy dissipation sheet (1) and the out-of-plane deformation energy dissipation sheet (2) are fixedly arranged between the first connecting plate (3) and the second connecting plate (4); The in-plane deformation energy dissipation sheet (1) is provided with a plurality of through holes (5) in an array in the longitudinal direction. The through holes (5) are a structure that gradually converges from the middle to the two ends, and the two ends face the first connecting plate (3) and the second connecting plate (4) respectively. Two out-of-plane deformation energy dissipation sheets (2) symmetrical with respect to the in-plane deformation energy dissipation sheet (1) are provided in the middle of two adjacent through holes (5). The out-of-plane deformation energy dissipation sheets (2) are perpendicular to the in-plane deformation energy dissipation sheet (1), and a reserved gap (6) is provided between the out-of-plane deformation energy dissipation sheets (2) and the in-plane deformation energy dissipation sheet (1). The contour line of the through hole (5) is an envelope line constructed by a first contour line constructed when the normal stress generated by the bending moment is equal to the yield stress and a second contour line constructed when the shear stress generated by the shear force is equal to the yield stress.

2. The assembled shear damper with shape optimization and staged yield energy dissipation mechanism according to claim 1, characterized in that: The first connecting plate (3) and the second connecting plate (4) are both provided with a plurality of assembly holes (7), and the plurality of assembly holes (7) are used to mount the first connecting plate (3) and the second connecting plate (4) on a support beam (8).

3. The assembled shear damper with shape-optimized staged yielding energy dissipation mechanism according to claim 1, characterized in that: The surface of the support beam (8) is provided with a pre-buried connecting steel plate (9) for connecting with the first connecting plate (3) and the second connecting plate (4); the pre-buried connecting steel plate (9) is fixed to the surface of the support beam (8) by a plurality of anchors (10) pre-buried in the support beam (8); the pre-buried connecting steel plate (9) is provided with a threaded hole (11) corresponding to the assembly hole (7); the first connecting plate (3) and the second connecting plate (4) are fixed to the pre-buried connecting steel plate (9) by bolts.

4. The assembled shear damper with shape optimization and staged yielding energy dissipation mechanism according to claim 1, characterized in that: The surfaces of the in-plane deformation energy dissipation sheet (1), the out-of-plane deformation energy dissipation sheet (2), the first connecting plate (3) and the second connecting plate (4) are all provided with an antioxidant layer.

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