A quick-locking friction pendulum seismic isolation bearing

Abstract

The invention discloses a quick-locking friction pendulum seismic isolation bearing, which belongs to the field of bridge construction. The quick-locking friction pendulum seismic isolation bearing comprises a bearing upper seat plate, a spherical lining plate and a bearing lower seat plate, the top of the bearing lower seat plate is fixedly connected with two groups of lower seat guide rails, the inner walls of the two groups of lower seat guide rails are connected with locking guide rail assemblies, an intermediate plate is slidably connected in the locking guide rail assembly, the spherical lining plate is arranged between the bearing upper seat plate and the intermediate plate, and the inner wall of the bearing upper seat plate is provided with a swing surface groove which is intended to cooperate with the top wall of the spherical lining plate, and the top of the intermediate plate is provided with a spherical groove which is matched with the upper and lower spherical surfaces of the spherical lining, and a double spherical rotation and swing is formed between the upper and lower sides of the spherical lining and the bearing upper seat plate and the intermediate plate respectively, a double spherical friction pair of the spherical liner is formed between the first slide plate, the swing surface stainless steel plate, the second slide plate and the spherical stainless steel plate to meet the daily rotation requirements of the bridge.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a quick-locking friction pendulum seismic isolation bearing. Background Art

[0002] The friction pendulum bearing shock absorption principle consumes energy through the conversion of kinetic potential energy, but it has a disadvantage that height changes will occur during the normal compensation displacement process. Even if the normal displacement and seismic displacement are separated by a certain structure so that there will be no height change under normal displacement, there is still a displacement space with no shock absorption or weak shock absorption performance (i.e., the normal displacement zone) in the bearing plate under seismic conditions, and the effect of coordinated force and multi-pier linkage seismic isolation cannot be achieved. That is, under seismic conditions, the displacement action of the normal displacement zone must be completed first, and then the seismic displacement can be performed, and full displacement shock absorption cannot be performed. Summary of the invention

[0003] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a quick-locking friction pendulum seismic isolation bearing, in which a double spherical rotation and swing is formed between the upper and lower sides of the spherical lining and the upper seat plate and the middle plate of the bearing respectively, and a double spherical friction pair of the spherical lining is formed between the first slide plate, the pendulum stainless steel plate, the second slide plate and the spherical stainless steel plate to meet the daily rotation needs of the bridge. At the same time, a plane stainless steel plate sliding pair is arranged to realize the daily sliding function of the bridge, and the guide rail assembly is locked to quickly lock the plane sliding function when an earthquake occurs, so as to realize the friction pendulum energy consumption, enable multiple bearing lower plates in the bridge to participate in seismic isolation energy consumption, improve the overall seismic isolation function of the bridge bearing lower plate, realize the coordinated seismic isolation effect of multiple points of the bridge, and improve the safety of the bridge.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A quick-locking friction pendulum seismic isolation bearing comprises a bearing upper seat plate, a spherical lining plate and a bearing lower seat plate, wherein the top of the bearing lower seat plate is fixedly connected with two sets of lower seat guide rails, the inner walls of the two sets of lower seat guide rails are fixedly connected with locking guide rail assemblies, and the locking guide rail assemblies comprise two sets of fixed guide rails, the two sets of fixed guide rails are arranged inside the two sets of lower seat guide rails, and gaps are left between the two sets of fixed guide rails and the two sets of lower seat guide rails, respectively; a third safety pin hole is opened at the top of the bearing lower seat plate, and a third safety pin hole is slidably connected inside the third safety pin hole Pin, a spring is arranged inside the third safety pin hole, and the two ends of the spring are respectively against the third safety pin hole and the bottom of the third safety pin, an intermediate plate is slidably connected between the two groups of the fixed guide rails, the spherical lining plate is arranged between the upper seat plate of the support and the intermediate plate, and the inner wall of the upper seat plate of the support is provided with a swing surface groove matched with the top wall of the spherical lining plate, and a spherical groove matched with the lower spherical surface of the spherical lining plate is opened on the top of the intermediate plate, and a limit plate is sleeved on the outer wall of the intermediate plate, and the limit plate is fixedly connected to the bottom of the upper seat plate of the support through multiple groups of first safety pins.

[0006] As a further solution of the present invention: the inner wall of the upper seat plate of the support is provided with a swing surface stainless steel plate, the top outer wall of the spherical lining plate is provided with a first slide plate, and the swing surface stainless steel plate is in contact with the first slide plate.

[0007] As a further solution of the present invention: a spherical stainless steel plate is arranged at the bottom of the spherical lining plate, a second slide plate is arranged at the top of the intermediate plate, and the spherical stainless steel plate is in contact with the top of the second slide plate.

[0008] As a further solution of the present invention: a flat stainless steel plate is fixedly connected to the top of the lower seat plate of the support, a third slide plate is provided at the bottom of the middle plate, and the third slide plate is in contact with the top of the flat stainless steel plate.

[0009] As a further solution of the present invention: the locking guide rail assembly also includes multiple groups of second safety pin holes opened on the tops of the two groups of fixed guide rails, the second safety pins are inserted in the second safety pin holes, and the bottom ends of the second safety pins extend into the lower seat plate of the support, the bottoms of both sides of the intermediate plate are provided with first semicircular holes, the side walls of the fixed guide rails are provided with second semicircular holes matching the third safety pin holes, multiple groups of threaded holes are opened on the side of the fixed guide rail away from the second semicircular holes, a bolt is slidably connected to the lower seat guide rail, one end of the bolt away from the lower seat guide rail is threadedly connected in the threaded hole, a disc spring is sleeved on the outer wall of the bolt, and the two ends of the disc spring are respectively against the end of the bolt and the lower seat guide rail.

[0010] As a further solution of the present invention: the outer walls on both sides of the middle plate are provided with side slide plates, and the inner walls of the two groups of fixed guide rails are provided with side stainless steel plates, and the side stainless steel plates are attached to the side slide plates.

[0011] As a further solution of the present invention: anchor bolt installation holes are provided at four corners of the support upper seat plate and the support lower seat plate, and anchor rods are provided inside the anchor bolt installation holes.

[0012] Beneficial effects of the present invention:

[0013] 1. In the present invention, double spherical rotation and swing are formed between the upper and lower sides of the spherical lining and the upper seat plate and the middle plate of the support respectively, and a double spherical friction pair of the spherical lining is formed between the first slide plate, the swing surface stainless steel plate, the second slide plate and the spherical stainless steel plate to meet the daily rotation needs of the bridge. At the same time, a flat stainless steel plate sliding pair is arranged to realize the daily sliding function of the bridge, and the guide rail assembly is locked to quickly lock the flat sliding function when an earthquake occurs, so as to realize the friction pendulum energy consumption, so that multiple bearing lower seats in the bridge participate in seismic isolation energy consumption, improve the overall seismic isolation function of the bridge bearing lower seat plate, realize the coordinated seismic isolation effect of the bridge multi-point bearing lower seat plate, and improve the safety of the bridge.

[0014] 2. In the present invention, the first safety pin, the second safety pin and the third safety pin are cut off in stages by locking the slide rail assembly, and the third safety pin is moved upward to be connected to the first semicircular hole on the middle plate and the second semicircular hole on the fixed guide rail, so as to lock the sliding surfaces of the middle plate and the lower seat plate of the support. The locking displacement is extremely short, the response is rapid, the locking method is simple and reliable, and the engineering cost and maintenance cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 The main cross-sectional structure of the present invention is schematically shown Figure 1 ;

[0017] Figure 2 The main cross-sectional structure of the present invention is schematically shown Figure 2 ;

[0018] Figure 3 It is a schematic diagram of a three-dimensional partial cross-sectional structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the connection structure between the lower seat plate of the support and the fixed guide rail of the present invention;

[0020] Figure 5 It is a schematic diagram of the connection structure between the lower seat plate and the lower seat guide rail of the support of the present invention;

[0021] Figure 6 It is a schematic diagram of the fixed guide rail structure of the present invention;

[0022] Figure 7 The present invention Figure 2 The enlarged structural diagram of part A in the middle;

[0023] Figure 8 The present invention Figure 1 The enlarged structural diagram of part B in the middle;

[0024] Fig. 9 The present invention Figure 2 Schematic diagram of the enlarged structure of part C in the middle.

[0025] In the figure: 1. support upper plate; 101. swing surface stainless steel plate; 2. spherical lining plate; 201. first slide plate; 202. spherical stainless steel plate; 3. limit plate; 301. first safety pin; 4. middle plate; 401. second slide plate; 402. third slide plate; 403. first semicircular hole; 404. side slide plate; 5. support lower plate; 50. lower seat guide rail; 501. flat stainless steel plate; 502. anchor bolt mounting hole; 503. third safety pin hole; 6. locking guide rail assembly; 60. fixed guide rail; 601. side stainless steel plate; 602. threaded hole; 603. second safety pin hole; 604. second semicircular hole; 7. anchor rod; 8. bolt; 9. disc spring; 10. third safety pin; 11. spring; 12. second safety pin. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 9As shown, a quick-locking friction pendulum seismic isolation bearing comprises a bearing upper seat plate 1, a spherical lining plate 2 and a bearing lower seat plate 5, the top of the bearing lower seat plate 5 is fixedly connected with two groups of lower seat guide rails 50, the inner walls of the two groups of lower seat guide rails 50 are connected with locking guide rail assemblies 6, the locking guide rail assembly 6 comprises two groups of fixed guide rails 60, the two groups of fixed guide rails 60 are arranged inside the two groups of lower seat guide rails 50, one side of the fixed guide rail 60 is provided with a plurality of groups of threaded holes 602, a bolt 8 is slidably connected to the lower seat guide rail 50, one end of the bolt 8 away from the lower seat guide rail 50 is threadedly connected in the threaded hole 602, the outer wall of the bolt 8 is sleeved with a disc spring 9, the two ends of the disc spring 9 are respectively abutted against the end of the bolt 8 and the lower seat guide rail 50, and the two groups of fixed guide rails 60 are respectively connected to the two groups of lower seat guide rails 50. A gap is left between the two groups, a third safety pin hole 503 is provided on the lower seat plate 5 of the support, a third safety pin 10 is slidably connected inside the third safety pin hole 503, a spring 11 is arranged inside the third safety pin hole 503, two ends of the spring 11 are respectively abutted against the third safety pin hole 503 and the bottom of the third safety pin 10, an intermediate plate 4 is slidably connected between the two groups of fixed guide rails 60, the spherical lining plate 2 is located between the upper seat plate 1 of the support and the intermediate plate 4, and the inner wall of the upper seat plate 1 of the support is provided with a swing surface groove matched with the top wall of the spherical lining plate 2, a spherical groove matched with the upper and lower spherical surfaces of the spherical lining plate 2 is provided on the top of the intermediate plate 4, a limit plate 3 is provided on the outer wall of the intermediate plate 4, and the limit plate 3 is fixedly connected to the bottom of the upper seat plate 1 of the support through multiple groups of first safety pins 301.

[0028] like Figure 1 As shown, a pendulum stainless steel plate 101 is welded on the concave arc surface of the inner wall of the upper seat plate 1 of the support, and a first slide plate 201 is embedded in the outer wall of the top of the spherical lining plate 2. The pendulum stainless steel plate 101 slides against the first slide plate 201, and the top of the spherical lining plate 2 contacts the pendulum stainless steel plate 101 on the inner wall of the upper seat plate 1 of the support through the first slide plate 201 to perform rotational friction, thereby reducing frictional resistance.

[0029] like Figure 1 and Fig. 9 As shown, a spherical stainless steel plate 202 is welded to the bottom of the spherical lining plate 2, a second slide plate 401 is embedded in the top of the middle plate 4, the spherical stainless steel plate 202 is in contact with the top of the second slide plate 401, and the spherical stainless steel plate 202 at the bottom of the spherical lining plate 2 rotates frictionally with the second slide plate 401 at the top of the middle plate 4, further reducing friction resistance.

[0030] like Figure 1 , Figure 2 and Fig. 9 As shown, a flat stainless steel plate 501 is welded on the top of the support lower seat plate 5, and a third slide plate 402 is embedded in the bottom of the middle plate 4. The third slide plate 402 is in contact with the top of the flat stainless steel plate 501, and the third slide plate 402 at the bottom of the middle plate 4 is in contact with and rubs against the flat stainless steel plate 501 on the support lower seat plate 5, thereby reducing the friction force of the sliding displacement of the middle plate 4.

[0031] like Figure 7 and Figure 8 As shown, the locking guide rail assembly 6 also includes a plurality of groups of second safety pin holes 603 opened on the top of the two groups of fixed guide rails 60, the second safety pin 12 is inserted into the second safety pin hole 603, and the bottom end of the second safety pin 12 extends into the lower seat plate 5 of the support, the bottom of both sides of the middle plate 4 are provided with a first semicircular hole 403, the side wall of the fixed guide rail 60 is provided with a second semicircular hole 604 matching the third safety pin hole 503, and the second semicircular hole 604 is aligned with the third safety pin hole 503 up and down.

[0032] In the present invention, the pre-stress displacement of the disc spring 9 is greater than the distance between the fixed guide rail 60 and the lower seat guide rail 50 , and the distance between the fixed guide rail 60 and the lower seat guide rail 50 is greater than the distance between the fixed guide rail 60 and the third safety pin 10 .

[0033] like Figure 7 and Figure 8 As shown, side slide plates 404 are welded to the outer walls of both sides of the middle plate 4, and side stainless steel plates 601 are embedded in the inner walls of the two sets of fixed guide rails 60, and the side stainless steel plates 601 are attached to the side slide plates 404.

[0034] like Figure 1 and Figure 5 As shown, anchor bolt mounting holes 502 are provided at the four corners of the support upper seat plate 1 and the support lower seat plate 5, and anchor rods 7 are arranged inside the anchor bolt mounting holes 502. The anchor rods 7 on the support upper seat plate 1 are connected to the beam body, and the anchor rods 7 at the bottom of the support lower seat plate 5 are connected to the pier top.

[0035] In the present invention, the contact surfaces of the swing stainless steel plate 101, the spherical stainless steel plate 202, the flat stainless steel plate 501 and the side stainless steel plate 601 with the first slide plate 201, the second slide plate 401, the third slide plate 402 and the side slide plate 404 are all mirror polished, and the maximum roughness is MRR Ramax0.2.

[0036] In the present invention, the friction coefficient between the first slide plate 201 and the swing surface stainless steel plate 101 is 0.05-0.07, and the friction coefficient between the second slide plate 401, the third slide plate 402 and the side slide plate 404 and the spherical stainless steel plate 202, the flat stainless steel plate 501 and the side stainless steel plate 601 is less than 0.05, which is used to reduce daily sliding and rotation friction resistance.

[0037] In the present invention, the shear force of the second safety pin 12 is smaller than that of the first safety pin 301, and the shear force of the third safety pin 10 is larger than the maximum limit horizontal force of the support lower seat plate 5 and the lower seat guide rail 50, that is, the maximum horizontal force of the support.

[0038] The working principle of the present invention is as follows: in the daily working state of the support, the beam body drives the upper seat plate 1 of the support to rotate on the spherical lining plate 2, and the first slide plate 201 on the upper side of the spherical lining plate 2 rotates in contact with the swing surface stainless steel plate 101 at the bottom of the upper seat plate 1 of the support, and the spherical stainless steel plate 202 at the bottom of the spherical lining plate 2 rotates in contact with the second slide plate 401 on the middle plate 4, so that a double spherical swing is formed between the upper seat plate 1 of the support, the spherical lining plate 2 and the middle plate 4, and at the same time, the third slide plate 402 at the bottom of the middle plate 4 slides on the flat stainless steel plate 501 on the lower seat plate 5 of the support, and the side slide plates 404 on both sides of the middle plate 4 slide in contact with the side stainless steel plates 601 on the sides of the fixed guide rail 60, thereby improving the sliding stability and preventing the beam from lifting.

[0039] When the earthquake load acts, the load force generated by the vibration first shortens the second safety pin 12, and the second safety pin 12 is separated from the part extending into the lower seat plate 5 of the support. The tension of the disc spring 9 pushes the bolt 8 to slide outward on the side wall of the lower seat guide rail 50, and the bolt 8 pulls the fixed guide rail 60 to move to the position of the lower seat guide rail 50, so that the second semicircular hole 604 at the bottom of the fixed guide rail 60 is concentrically aligned with the third safety pin hole 503, and the tension of the spring 11 pushes the third safety pin 10 to move upward and snap into the second semicircular hole 604. At the same time, the middle plate 4 is affected by the earthquake and is in the lower seat plate 5 of the support. The intermediate plate 4 performs reciprocating motion, and during the movement, when the first semicircular hole 403 on the side wall of the intermediate plate 4 is concentric with the third safety pin hole 503, the tension of the spring 11 pushes the third safety pin 10 to continue to slide upward and get stuck in the first semicircular hole 403, thereby connecting the fixed guide rail 60, the intermediate plate 4 and the lower seat plate 5 of the support together, and then the vibration load force of the earthquake is transmitted to the first safety pin 301, so that the first safety pin 301 is sheared, and the swing surface stainless steel plate 101 at the bottom of the upper seat plate 1 of the support and the first slide plate 201 on the spherical lining plate 2 swing and frictionally consume energy.

[0040] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A quick-locking friction pendulum seismic isolation bearing, comprising a bearing upper base plate (1), a spherical lining plate (2) and a bearing lower base plate (5), characterized in that: The top of the support lower seat plate (5) is fixedly connected with two groups of lower seat guide rails (50), and the inner walls of the two groups of lower seat guide rails (50) are fixedly connected with locking guide rail assemblies (6), and the locking guide rail assembly (6) includes two groups of fixed guide rails (60), and the two groups of fixed guide rails (60) are arranged inside the two groups of lower seat guide rails (50), and there is a gap between the two groups of fixed guide rails (60) and the two groups of lower seat guide rails (50). The top of the support lower seat plate (5) is provided with a third safety pin hole (503), and the third safety pin hole (503) is slidably connected with a third safety pin (10), and the third safety pin hole (503) is provided with a spring (10) inside. 1), the two ends of the spring (11) are respectively against the third safety pin hole (503) and the bottom of the third safety pin (10), an intermediate plate (4) is slidably connected between the two groups of fixed guide rails (60), the spherical lining plate (2) is arranged between the support upper seat plate (1) and the intermediate plate (4), and the inner wall of the support upper seat plate (1) is provided with a swing surface groove matching the top wall of the spherical lining plate (2), the top of the intermediate plate (4) is provided with a spherical groove matching the lower spherical surface of the spherical lining plate (2), the outer wall of the intermediate plate (4) is sleeved with a limit plate (3), and the limit plate (3) is fixedly connected to the bottom of the support upper seat plate (1) through multiple groups of first safety pins (301); The locking guide rail assembly (6) further comprises a plurality of groups of second safety pin holes (603) formed on the tops of the two groups of fixed guide rails (60), a second safety pin (12) being inserted into the second safety pin hole (603), and the bottom end of the second safety pin (12) extending into the lower seat plate (5) of the support, first semicircular holes (403) being formed on the bottoms of both sides of the intermediate plate (4), a second semicircular hole (604) cooperating with the third safety pin hole (503) being formed on the side wall of the fixed guide rail (60), a plurality of groups of threaded holes (602) being formed on the side of the fixed guide rail (60) away from the second semicircular hole (604), a bolt (8) being slidably connected to the lower seat guide rail (50), one end of the bolt (8) away from the lower seat guide rail (50) being threadedly connected in the threaded hole (602), a disc spring (9) being sleeved on the outer wall of the bolt (8), and two ends of the disc spring (9) respectively abutting against the end of the bolt (8) and the lower seat guide rail (50).

2. The quick-locking friction pendulum seismic isolation support according to claim 1, characterized in that: The inner wall of the support upper seat plate (1) is provided with a swing surface stainless steel plate (101), and the top outer wall of the spherical lining plate (2) is provided with a first slide plate (201), and the swing surface stainless steel plate (101) is in contact with the first slide plate (201).

3. The quick-locking friction pendulum seismic isolation support according to claim 1, characterized in that: A spherical stainless steel plate (202) is arranged at the bottom of the spherical lining plate (2), a second slide plate (401) is arranged at the top of the intermediate plate (4), and the spherical stainless steel plate (202) is in contact with the top of the second slide plate (401).

4. The quick-locking friction pendulum seismic isolation bearing according to claim 1, characterized in that: A flat stainless steel plate (501) is fixedly connected to the top of the support lower seat plate (5), and a third slide plate (402) is provided at the bottom of the intermediate plate (4), wherein the third slide plate (402) is in contact with the top of the flat stainless steel plate (501).

5. The quick-locking friction pendulum seismic isolation bearing according to claim 1, characterized in that: Side sliding plates (404) are provided on the outer walls of both sides of the middle plate (4), and side stainless steel plates (601) are provided on the inner walls of the two sets of fixed guide rails (60), and the side stainless steel plates (601) are in contact with the side sliding plates (404).

6. The quick-locking friction pendulum seismic isolation bearing according to claim 1, characterized in that: Anchor bolt mounting holes (502) are provided at four corners of the support upper seat plate (1) and the support lower seat plate (5), and anchor rods (7) are provided inside the anchor bolt mounting holes (502).

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