Shock-vibration double-control multi-stage friction pendulum shock insulation support

Abstract

The shock-vibration double-control multi-stage friction pendulum shock insulation support comprises two first concave surface discs (10) which correspond to each other up and down, two second concave surface discs (20) which are arranged between the first concave surface discs and correspond to each other up and down, and a vertical shock insulation module (30) arranged between the second concave surface discs, each vertical shock insulation module comprises an upper sleeve (31), a lower sleeve (32), an upper cover plate (33), a lower cover plate (34), a spring (35) and a prestress stranded wire (36), the upper sleeve and the lower sleeve are nested with each other, a two-step groove is formed in the upper end of the upper sleeve, the upper cover plate is fixedly embedded in the shallow groove of the upper sleeve, a two-step groove is formed in the lower end of the lower sleeve, the lower cover plate is fixedly embedded in the shallow groove of the lower sleeve, and the prestress stranded wire (36) is arranged between the upper sleeve and the lower sleeve. The spring is arranged in a sleeve containing cavity formed by mutually nesting the upper sleeve and the lower sleeve, one end of the prestress stranded wire is anchored at the bottom of the inner side of the lower sleeve, and the other end of the prestress stranded wire penetrates through the spring to be anchored in the deeper groove of the upper sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration / vibration control, in particular to a multi-order friction pendulum isolation support with dual vibration and vibration control. Background Art

[0002] The traditional friction pendulum dissipates energy through the friction between the upper and lower surfaces of the central slider and the upper and lower concave disks, and the circular sliding surfaces of the upper and lower concave disks achieve self-resetting function. However, the period, lateral stiffness, damping, displacement capacity and other parameters of the traditional friction pendulum are all constant values, and it is impossible to achieve multiple performance goals under small, medium and large earthquakes. To solve this problem, multi-order friction pendulum supports are proposed in the prior art. However, the multi-order friction pendulum in the prior art only has an isolation effect on horizontal seismic forces, and the isolation effect on vertical seismic forces is relatively weak. That is, the vertical isolation capacity is insufficient, and the multi-order friction pendulum is mainly designed for horizontal seismic forces, while the isolation effect on vertical seismic forces is relatively weak. Vertical seismic forces (seismic acceleration in the vertical direction) can also have a significant impact on building structures, especially for structures such as high-rise buildings and bridges, whose vertical response may cause damage or even failure of structural components.

[0003] Therefore, it is expected to develop new technical methods that can at least partially overcome the deficiencies in the existing technologies. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present application proposes a multi-stage friction pendulum isolation bearing with dual vibration control. The friction pendulum isolation bearing allows the building to deform vertically, and performs certain deformation and vibration absorption through the vertical isolation sleeve, thereby reducing the transmission of vibration; it can simultaneously control horizontal and vertical vibrations, thereby improving the overall seismic resistance of the building during earthquakes; it extends the natural period of the building, keeping it away from the main frequency range of the earthquake, thereby reducing the occurrence of resonance effects.

[0005] More specifically, the utility model proposes a multi-order friction pendulum isolation support with dual vibration control, characterized in that it comprises: two first concave disks (10) corresponding to each other, two second concave disks (20) corresponding to each other arranged between the first concave disks, and a vertical isolation module (30) arranged between the second concave disks, wherein the vertical isolation module comprises two mutually nested upper sleeves (31) and lower sleeves (32), an upper cover plate (33), a lower cover plate (34), and a spring (35). The upper end of the upper sleeve (31) is formed with a two-step groove, the upper cover plate is embedded in the shallower groove of the upper sleeve, the lower end of the lower sleeve (32) is formed with a two-step groove, the lower cover plate (34) is embedded in the shallower groove of the lower sleeve, the spring (35) is placed in the sleeve cavity in which the upper sleeve (31) and the lower sleeve (32) are nested with each other, one end of the prestressed strand (36) is anchored on the inner bottom of the lower sleeve, and the other end passes through the spring and is anchored in the deeper groove of the upper sleeve.

[0006] According to an embodiment of the present utility model, the upper surface of the upper cover plate (33) is convexly arc-shaped, and an arc-shaped first friction thin plate (331) is formed on the upper surface.

[0007] According to an embodiment of the present utility model, the lower surface of the lower cover plate (34) is convexly arc-shaped, and an arc-shaped second friction thin plate (341) is formed on the lower surface.

[0008] According to an embodiment of the present invention, one end of the prestressed strand (36) is anchored in a shallow groove of the lower sleeve.

[0009] According to an embodiment of the present invention, the outer peripheries of the first concave disk (10) and the second concave disk (20) are respectively formed with a first limiting ring (11) and a second limiting ring (21).

[0010] According to an embodiment of the present invention, the surface of the second concave disk (20) in contact with the first concave disk (10) is convexly arcuate, and a third arc-shaped friction plate (22) is formed on the surface.

[0011] According to the embodiment of the present invention, through holes are formed in the two-step grooves of the upper sleeve (31) and the lower sleeve (32), and the prestressed strands (36) pass through the through holes and are fixed in the two-step grooves by anchors (361).

[0012] According to the embodiment of the present invention, the lower edge of the upper sleeve (31) protrudes outward in the horizontal direction to form a first convex ring (311), and a first coating (312) is formed on the outer wall of the upper sleeve (31) and the vertical outer surface of the first convex ring (311).

[0013] According to the embodiment of the present invention, the upper edge of the lower sleeve (32) protrudes inward in the horizontal direction to form a second convex ring (321), and a second coating (322) is formed on the inner side wall of the lower sleeve (32) and the vertical inner surface of the second convex ring (321).

[0014] According to the embodiment of the present invention, the upper cover plate (33) and the lower cover plate (34) are made of magnetic material and can be adsorbed in the shallow grooves of the upper sleeve (31) and the lower sleeve (32) respectively.

[0015] In the implementation scheme of the present invention, the high-strength steel spring provides vertical stiffness and provides vertical seismic isolation capability to the structure, thereby having three-dimensional seismic isolation capability, while the traditional multi-order friction pendulum cannot provide vertical seismic isolation capability.

[0016] This embodiment of the utility model allows for flexible adjustment of the vertical height of the component, reducing construction errors. The upper cover plate is magnetically attached between the upper sleeve and the second concave disk, enhancing the structural integrity. If vertical height errors occur during construction, the upper cover plate can be removed using electromagnetic equipment, the prestressed steel strands are tensioned, the first sleeve is pressed down, and the distance between the first and second sleeve convex rings is adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a multi-stage friction pendulum isolation support with dual vibration control according to the embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the explosion structure of a multi-order friction pendulum isolation support with dual vibration control according to the embodiment of the present utility model; and

[0019] Figure 3 for Figure 1 The enlarged view of a part of the multi-order friction pendulum isolation support with dual vibration control is shown. DETAILED DESCRIPTION

[0020] The present invention will be further described below in detail through specific embodiments in conjunction with the accompanying drawings. The illustrated contents are used to fully illustrate the contents of the present invention but are not used to limit the present invention.

[0021] Figure 1 Schematic diagram of the structure of a multi-stage friction pendulum isolation support with dual vibration control according to the embodiment of the present invention; Figure 2 Schematic diagram of the explosion structure of the multi-stage friction pendulum isolation support with dual vibration control according to the embodiment of the utility model; Figure 3 for Figure 1A partial enlarged view of a multi-stage friction pendulum isolation support with dual vibration control is shown. As shown in the figure, the multi-stage friction pendulum isolation support with dual vibration control of the embodiment may include two first concave disks (10) corresponding to each other in upper and lower directions, two second concave disks (20) corresponding to each other in upper and lower directions arranged between the first concave disks, and a vertical isolation module (30) arranged between the second concave disks.

[0022] As shown in the figure, two first concave disks (10) are arranged at the upper and lower ends of the entire support. The top surface of the upper first concave disk is a plane and can be connected to the building structure; the top surface of the lower first concave disk is a plane and can be connected to the structural foundation. The contact surface between the first concave disk (10) and the second concave disk (20) is a concave arc surface. In addition, a first limiting ring (11) can be formed on the outer periphery of each of the first concave disks (10) to limit the sliding range of the second concave disk (20).

[0023] The first concave plate (10) and the second concave plate (20) can be made of metal materials such as steel, iron or other suitable materials. When other materials such as non-metallic materials are used, a stainless steel sliding panel (not shown) having a similar curved surface can be provided (e.g., glued) on the concave curved surface of the first concave plate (10).

[0024] The two second concave disks (20) are respectively arranged to contact the concave arc surfaces of the two first concave disks (10). The shapes are similar to those of the first concave disks (10), but the diameters are smaller. The surface of the second concave disk (20) in contact with the first concave disk (10) is a convex arc, and a third arc-shaped friction plate (22) is formed on the surface. For example, the friction plate can be made of polytetrafluoroethylene material, thereby forming a sliding contact with the first concave disk (10). The lower surface of the upper second concave disk (20) contacts the upper cover plate (33), and the upper surface of the lower second concave disk (20) contacts the lower cover plate (34), and the contact surfaces are formed into arc-shaped surfaces. Second limiting rings (21) can be formed on the outer periphery of the second concave disk (20) to limit the sliding range of the upper cover plate (33) and the lower cover plate (34).

[0025] The upper cover plate (33) and the lower cover plate (34) of the two second concave disks (20) can be made of metal materials such as steel, iron or other suitable materials. When other materials such as non-metallic materials are used, a stainless steel sliding panel (not shown) having a similar curved surface can be provided (for example, glued) on the concave curved surface of the second concave disk (20) that contacts the upper cover plate (33) and the lower cover plate (34).

[0026] As shown in the figure, the vertical seismic isolation module (30) may include two mutually nested upper sleeves (31) and lower sleeves (32), an upper cover plate (33), a lower cover plate (34), a spring (35) and a prestressed strand (36).

[0027] The lower end of the upper sleeve (31) is open, and a two-step groove is formed at the upper end, with a through hole formed in the center of the groove; the upper cover plate (33) is embedded in the shallower groove of the upper sleeve, for example, the upper cover plate (33) can be made of magnetic material, so that it can be adsorbed in the shallower groove of the upper sleeve (31). The upper surface of the upper cover plate (33) is convex and arc-shaped, and a first arc-shaped friction plate (331) is formed on the upper surface, forming a sliding contact with the lower surface of the second concave disk (20) above. For example, the first friction plate (331) can be formed of polytetrafluoroethylene material. The lower end edge of the upper sleeve (31) protrudes outward in the horizontal direction to form a first convex ring (311); a first coating (312) is formed on the outer wall of the upper sleeve (31) and the vertical outer surface of the first convex ring (311) to reduce friction, for example, the coating can be formed of polytetrafluoroethylene material.

[0028] The lower sleeve (32) has an open upper end and a two-step groove formed at the lower end. A through hole is formed in the center of the groove. The lower cover plate (34) is embedded in the shallow groove of the lower sleeve. For example, the lower cover plate (34) can be made of a magnetic material so that it can be adsorbed in the shallow groove of the lower sleeve (32). The lower surface of the lower cover plate (34) is convex and arc-shaped, and a second friction plate (341) can be formed on the lower surface to form a sliding contact with the lower surface of the second concave disk (20) below. For example, the second friction plate (341) can be formed of polytetrafluoroethylene. The upper edge of the lower sleeve (32) protrudes inward in the horizontal direction to form a second convex ring (321). A second coating (322) can be formed on the inner side wall of the lower sleeve (32) and the vertical inner surface of the second convex ring (321) to reduce friction. For example, the coating can be formed of polytetrafluoroethylene.

[0029] The spring (35) is placed in the sleeve cavity where the upper sleeve (31) and the lower sleeve (32) are nested with each other. One end of the prestressed strand (36) is anchored on the inner bottom of the lower sleeve, and the other end passes through the spring and is anchored in the deeper groove of the upper sleeve. More specifically, both ends of the prestressed strand (36) can be provided with anchors (361), such as nuts. The anchors (361) are arranged in the shallower groove of the two-step grooves of the upper sleeve (31) and the lower sleeve (32), thereby connecting the upper sleeve (31) and the lower sleeve (32).

[0030] The lower end of the spring (35) is fixed to the bottom of the inner side of the lower sleeve (32), and one end of the prestressed strand (36) is anchored in the deeper groove of the two-step groove of the lower sleeve (32). After the spring is pressed down to apply a set prestress, the upper end of the spring (35) abuts against the top of the inner side of the upper sleeve (31), and the other end of the prestressed strand (36) is anchored in the deeper groove of the two-step groove of the upper sleeve (31).

[0031] The upper sleeve (31) is sleeved in the lower sleeve (32), and the two sleeves can move up and down relative to each other. The range of movement is controlled by the mutual nesting of the first protruding ring (311) of the upper sleeve (31) and the second protruding ring (321) of the lower sleeve (32). In addition, the first coating (312) formed on the outer wall of the upper sleeve (31) and the vertical outer surface of the first protruding ring (311) and the second coating (322) formed on the inner wall of the lower sleeve (32) and the vertical inner surface of the second protruding ring (321) can reduce the friction resistance between the two sleeves.

[0032] When the support of the implementation scheme is used, the prestressed strand (36) is tensioned, the spring is compressed, and the first convex ring of the upper sleeve (31) is lowered by a set distance a. After the support is installed in place, the upper load causes the spring to continue to be compressed, and the first convex ring of the upper sleeve (31) is lowered by a set distance (a+b). Under normal working conditions, the upper and lower cover plates, the upper sleeve, the lower sleeve, the spring, the anchor, and the prestressed strand form a seismic isolation module. Under horizontal earthquakes, when a small earthquake occurs, the upper and lower cover plates of the seismic isolation module slide relative to the inner sliding surface of the second concave disk (20). Under large earthquakes, the friction plates at the upper and lower ends of the second concave disk (20) slide relative to the inner sliding surface of the first concave disk (10); under vertical earthquakes, the springs in the seismic isolation module will stretch and compress, extending the structural period and reducing the response amplitude of the vertical vibration.

[0033] The above description of the embodiments is intended to facilitate understanding and application of the present invention by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the embodiments described herein. Improvements and modifications made by those skilled in the art based on the disclosure of this invention without departing from the scope of this invention are intended to be within the scope of protection of this invention.

Claims

1. A multi-stage friction pendulum isolation support with dual vibration control, characterized in that: The invention comprises two first concave disks (10) corresponding to each other, two second concave disks (20) corresponding to each other arranged between the first concave disks, and a vertical seismic isolation module (30) arranged between the second concave disks. The vertical seismic isolation module comprises two mutually nested upper sleeves (31) and lower sleeves (32), an upper cover plate (33), a lower cover plate (34), a spring (35), and a prestressed strand (36). The upper end of the upper sleeve (31) is formed with a two-step groove, the upper cover plate is embedded in the shallower groove of the upper sleeve, the lower end of the lower sleeve (32) is formed with a two-step groove, the lower cover plate (34) is embedded in the shallower groove of the lower sleeve, the spring (35) is placed in the mutually nested sleeve cavity of the upper sleeve (31) and the lower sleeve (32), one end of the prestressed strand (36) is anchored on the inner bottom of the lower sleeve, and the other end passes through the spring and is anchored in the deeper groove of the upper sleeve.

2. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: The upper surface of the upper cover plate (33) is convexly arc-shaped, and an arc-shaped first friction thin plate (331) is formed on the upper surface.

3. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: The lower surface of the lower cover plate (34) is convexly arc-shaped, and an arc-shaped second friction thin plate (341) is formed on the lower surface.

4. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: One end of the prestressed strand (36) is anchored in a shallow groove of the lower sleeve.

5. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: A first limiting ring (11) and a second limiting ring (21) are formed on the outer peripheries of the first concave disk (10) and the second concave disk (20), respectively.

6. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: The surface of the second concave disk (20) that contacts the first concave disk (10) is convexly arcuate, and a third arc-shaped friction plate (22) is formed on the surface.

7. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: Through holes are formed in the two-step grooves of the upper sleeve (31) and the lower sleeve (32), and the prestressed strands (36) pass through the through holes and are fixed in the two-step grooves by anchors (361).

8. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1 is characterized in that: The lower end edge of the upper sleeve (31) protrudes outward in the horizontal direction to form a first convex ring (311), and a first coating (312) is formed on the outer side wall of the upper sleeve (31) and the vertical outer surface of the first convex ring (311).

9. The multi-stage friction pendulum isolation support with dual vibration control according to claim 8, characterized in that: The upper edge of the lower sleeve (32) protrudes inward in the horizontal direction to form a second convex ring (321), and a second coating (322) is formed on the inner side wall of the lower sleeve (32) and the vertical inner surface of the second convex ring (321).

10. The multi-stage friction pendulum isolation support with dual vibration control according to claim 1, characterized in that: The upper cover plate (33) and the lower cover plate (34) are made of magnetic material and can be adsorbed in the shallow grooves of the upper sleeve (31) and the lower sleeve (32) respectively.

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