Longitudinal and transverse friction pendulum seismic mitigation and isolation support for bridge

Abstract

The invention relates to the technical field of engineering damping, and provides a bridge longitudinal and transverse friction pendulum seismic mitigation and isolation support which comprises embedded steel plates, support plate assemblies, joint sliding blocks and sliding limiting mechanisms, the embedded steel plates are detachably provided with the support plate assemblies, and the joint sliding blocks are slidably arranged between the two support plate assemblies; the joint sliding block can slide on the two support plate assemblies, the upper side and the lower side of the joint sliding block are arranged to be in a curved surface shape matched with the two support plate assemblies correspondingly, the multiple sliding limiting mechanisms are detachably connected to the upper seat plate correspondingly, and the sliding limiting mechanisms are used for restraining sliding of a bridge. The problem that in the prior art, it is difficult to adjust damping and supporting according to different deformation and rotation amounts of a bridge in the forward bridge direction and the transverse bridge direction is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering shock absorption technology, in particular to a bridge longitudinal and transverse friction pendulum seismic isolation bearing. BACKGROUND

[0002] When the bridge is constructed, the width of the bridge deck gradually widens, the number of vehicles passing through the bridge body increases significantly, and the overall load of the bridge deck also increases, which causes the bending deformation of the bridge body, and further causes the rotation of the two ends of the bridge body. If the support of the bridge body is hard supported by the bridge, it will cause the cracking of the bridge beam. Therefore, a rotating structure needs to be used in the support device between the support and the bridge. The existing friction pendulum bearing is mainly supported by a spherical surface. The bridge can rotate in all directions on the bearing, but on the other hand, the bridge can rotate in multiple directions, which causes the loss of stability when the bridge is supported.

[0003] The existing bearing is mainly supported by a spherical surface. When the bridge slides, the friction and displacement of the spherical surface are used for shock absorption, but the isolation period in all directions is the same, and the deformation and rotation of the bridge in the longitudinal direction and the transverse direction are different, which makes it difficult to adjust the shock absorption and support according to the different requirements in all directions. SUMMARY

[0004] The present application provides a bridge longitudinal and transverse friction pendulum seismic isolation bearing, which can solve the problem that the existing technology cannot adjust the shock absorption and support according to the different deformation and rotation of the bridge in the longitudinal direction and the transverse direction.

[0005] The technical scheme of the present application is as follows: A bridge longitudinal and transverse friction pendulum seismic isolation bearing, comprising an upper embedded steel plate, a lower embedded steel plate, a bearing plate assembly, a joint sliding block and a sliding limiting mechanism, the upper embedded steel plate is fixedly installed on the bridge, the lower embedded steel plate is fixedly installed on the bridge body support, the lower embedded steel plate is aligned with the upper embedded steel plate, the upper embedded steel plate and the lower embedded steel plate are detachably provided with a bearing plate assembly, two bearing plate assemblies are oppositely arranged, a joint sliding block is slidably arranged between two bearing plate assemblies, two bearing plate assemblies extrude the joint sliding block, the joint sliding block can slide on two bearing plate assemblies, the upper and lower sides of the joint sliding block are respectively provided with a curved surface matched with two bearing plate assemblies, a plurality of sliding limiting mechanisms are detachably connected to the upper embedded steel plate and the lower embedded steel plate, the sliding limiting mechanism arranged on the upper embedded steel plate is in contact with the bearing plate assembly arranged on the lower embedded steel plate, the sliding limiting mechanism arranged on the lower embedded steel plate is in contact with the bearing plate assembly arranged on the upper embedded steel plate, and the sliding limiting mechanism is used for limiting the sliding of the bridge.

[0006] The upper pre-embedded steel plate and the lower pre-embedded steel plate are provided with groove positions, and damping rubber pads are arranged in the groove positions; the support plate assembly is detachably arranged in the groove positions and is attached to the damping rubber pads.

[0007] The support plate assembly comprises a support plate frame, a lower concave arc surface one and two lower concave arc surfaces two; the support plate frame is detachably arranged in the groove positions; the support plate frame is rectangular; the support plate frame is in contact with the sliding limiting mechanism; the lower concave arc surface one is arranged at the central position of the support plate frame; two lower concave arc surfaces two are arranged in the support plate frame; the two lower concave arc surfaces two are arranged on the two sides of the lower concave arc surface one; the two lower concave arc surfaces two are tangent to the lower concave arc surface one; the joint sliding block can slide along the lower concave arc surface one; and the joint sliding block can be in contact with the lower concave arc surface two.

[0008] The lower concave arc surface two and the lower concave arc surface one are curved away from the support plate frame; the curvature radius of the lower concave arc surface two is smaller than that of the lower concave arc surface one; and the sliding range of the joint sliding block on the lower concave arc surface one is greater than the reciprocating sliding range on the lower concave arc surface two and the lower concave arc surface one.

[0009] The joint sliding block comprises clamping pieces, sliding block pads and sliding plates; a plurality of through holes are arranged on the clamping pieces; two sliding block pads are detachably connected to the two sides of the clamping pieces; two sliding plates are detachably connected to the clamping pieces; the two sliding plates are arranged on the sides of the two sliding block pads away from the clamping pieces; the sliding plates are in contact with the lower concave arc surface one; the sliding plates are provided with arc surfaces matched with the lower concave arc surface two on the sides close to the two lower concave arc surfaces two; and the sliding plates can be in contact with the lower concave arc surface two.

[0010] The sliding limiting mechanism comprises trapezoidal supports and damping rubber pads two; the trapezoidal supports are detachably connected to the upper pre-embedded steel plate or the lower pre-embedded steel plate; a plurality of damping rubber pads two are fixedly connected to the trapezoidal supports; and the damping rubber pads two can be in contact with the support plate frame. The damping rubber pads two on the plurality of trapezoidal supports can be in contact with the two sides of the support plate frame close to the two ends of the lower concave arc surface one.

[0011] A plurality of connecting steel frames are fixedly connected between the upper pre-embedded steel plate and the lower pre-embedded steel plate.

[0012] The working principle and beneficial effects of the present application are as follows: 1. The support plate assembly is arranged in the application, the sliding range of the support plate assembly in two directions is different and can be selected according to the requirement, the sliding range in two directions is different, and the main shock absorbing direction exists, and the sliding range in the other direction is used as the elastic control of the bridge rotating direction, so that the service life of the whole support is reduced; 2. The side surface curvature of the joint sliding block in contact with the support plate assembly can be adjusted according to the support plate assembly in the application, and then the support plate assembly is matched, the shock absorbing effect of the bridge is adjusted through the setting of the joint sliding block and the support plate assembly when the bridge rotates, and the shock absorbing effect of the bridge in the longitudinal direction and the transverse direction can be adjusted respectively; 3. The support plate assembly and the joint sliding block are arranged in the application, and the adjustment is matched, and then the shock absorbing effect of the bridge in the longitudinal direction and the transverse direction is adjusted respectively, compared with the traditional friction pendulum support, the shock absorbing effect in each direction is the same, the shock absorbing effect in the longitudinal direction and the transverse direction is different and can be adjusted respectively in the application, the shock absorbing effect in different directions is targetedly enhanced, the sliding limiting mechanism is arranged, the support plate assembly in the opposite position is pushed and the shock absorbing is reduced, and the pressure of the support plate assembly for shock absorbing is reduced, and the reset of the bridge is assisted. DETAILED DESCRIPTION

[0013] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0014] Fig. 1 It is a schematic view of the whole structure in the application; Fig. 2 It is another view of the whole structure in the application; Fig. 3 It is a schematic view of the internal structure of the upper embedded steel plate and the lower embedded steel plate in the application; Fig. 4 It is a schematic view of the internal structure of the support plate frame and the joint sliding block in the application; Fig. 5 It is a schematic view of the internal structure of the support plate frame and the joint sliding block in the application; Fig. 6 It is a schematic view of the internal structure of the whole structure in the application; Fig. 7 It is a schematic view of the internal structure of the sliding block pad and the sliding plate in the application.

[0015] In the figure: 1, upper embedded steel plate; 2, lower embedded steel plate; 3, shock absorbing rubber pad I; 4, support plate frame; 5, lower concave arc surface I; 6, lower concave arc surface II; 7, clamping piece; 8, sliding block pad; 9, sliding plate; 10, trapezoidal support; 11, shock absorbing rubber pad II; 12, connecting steel frame. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work, are involved in the protection scope of the present application.

[0017] As Figs. 1-7As shown in the figure, this embodiment proposes a bridge longitudinal and transverse friction pendulum seismic isolation bearing, including an upper embedded steel plate 1, a lower embedded steel plate 2, a bearing plate assembly, a joint slider, and a sliding limiting mechanism. The upper embedded steel plate 1 is fixedly installed on the bridge, and the lower embedded steel plate 2 is fixedly installed on the bridge body bearing. The lower embedded steel plate 2 is aligned with the upper embedded steel plate 1. Bearing plate assemblies are detachably installed on both the upper embedded steel plate 1 and the lower embedded steel plate 2. The two bearing plate assemblies are arranged opposite each other and cross-shaped. A joint slider is slidably installed between the two bearing plate assemblies. The two bearing plate assemblies press against the joint slider, allowing the joint slider to slide on the two bearing plate assemblies. The upper and lower sides of the joint slider are respectively set as curved surfaces to cooperate with two support plate assemblies. Multiple sliding limit mechanisms are detachably connected to the upper embedded steel plate 1 and the lower embedded steel plate 2. The sliding limit mechanism set on the upper embedded steel plate 1 contacts the support plate assembly set on the lower embedded steel plate 2, and the sliding limit mechanism set on the lower embedded steel plate 2 contacts the support plate assembly set on the upper embedded steel plate 1. The sliding limit mechanism is used to constrain the sliding of the bridge. Multiple connecting steel frames 12 are fixedly connected between the upper embedded steel plate 1 and the lower embedded steel plate 2. The traditional friction pendulum support is set as a circle, so that the joint slider slides evenly in multiple directions. In this application, the two bearing plate assemblies have different lengths in two directions, resulting in different sliding ranges for the articulated slider in each direction. The two bearing plate assemblies are vertically arranged, allowing the bridge to slide on the two bearing plate assemblies separately during lateral and longitudinal rotation. The bearing plate frames 4 on the two bearing plate assemblies can also be separately installed, and the articulated slider is adjusted accordingly. The two sides of the articulated slider cooperate with the two bearing plate assemblies, allowing for separate adjustments in the lateral and longitudinal directions. After calculation based on the actual conditions of the bridge, a suitable bearing plate assembly is selected. Simultaneously, the sliding limit mechanism can control the bearings at opposite positions. The sliding limit mechanism limits the support plate assembly. Traditionally, the limiting method involves setting a structure on one side of the support plate assembly to limit the support plate assembly on the other side. This application uses a sliding limit mechanism to limit the support plate assembly at the opposite position, which reduces the pressure of the bolts used to fix the support plate assembly and improves the shock absorption effect of the support plate assembly. The two ends of the connecting steel frame 12 are detachably connected to the upper embedded steel plate 1 and the lower embedded steel plate 2, respectively. The upper embedded steel plate 1 and the lower embedded steel plate 2 are positioned by the connection of the connecting steel frame 12. When installing the upper embedded steel plate 1 and the lower embedded steel plate 2, the entire assembly can be placed and installed by hoisting the connecting steel frame 12.

[0018] like Figs. 1-6As shown, both the upper embedded steel plate 1 and the lower embedded steel plate 2 have slots. A shock-absorbing rubber pad 3 is installed in the slot. The support plate assembly is detachably installed in the slot and fits against the shock-absorbing rubber pad 3. The support plate frame 4 is fixed to the upper embedded steel plate 1 or the lower embedded steel plate 2 by bolts. The part of it that extends into the slot contacts the shock-absorbing rubber pad 3. When it is compressed, the two support plate frames 4 compress the joint slider. At this time, the shock-absorbing rubber pad can dampen the pressure of the support plate frame 4.

[0019] like Figs. 4-6 As shown, the support plate assembly includes a support plate frame 4, a first concave arc surface 5, and a second concave arc surface 6. The support plate frame 4 is detachably mounted in the slot and is rectangular. The support plate frame 4 contacts the sliding limiting mechanism. The first concave arc surface 5 is located at the center of the support plate frame 4. The two second concave arc surfaces 6 are located in the support plate frame 4, respectively located on both sides of the first concave arc surface 5. Both second concave arc surfaces 6 are tangent to the first concave arc surface 5. The joint slider can slide along the first concave arc surface 5. The joint slider is in contact with the concave arc surface 26. Both the concave arc surface 26 and the concave arc surface 15 are bent away from the support plate frame 4. The bending radius of the concave arc surface 26 is smaller than that of the concave arc surface 15. The sliding range of the joint slider on the concave arc surface 15 is greater than the reciprocating sliding range on the concave arc surfaces 26 and 15. The two support plate frames 4 are parallel to the longitudinal and transverse directions of the bridge body, respectively. When the bridge rotates, the joint slider reciprocates on the concave arc surface 15, and the two support plate frames 4 slide in two directions on the joint slider. The two sides of the articulated slider correspond to the two support plate frames 4 respectively, and the curvature of the position of the articulated slider near the concave arc surface 6 on each side corresponds to the concave arc surface 6. When the bridge rotates in the longitudinal direction, the articulated slider slides on the concave arc surface 5 on the longitudinal support plate frame 4, and at the same time slides in the longitudinal direction on the transverse support plate frame 4. When it slides onto the concave arc surface 6, the radius of the concave arc surface 6 is smaller, and the resulting friction and pressure can push the articulated slider towards the position of the concave arc surface 5. The support plate frame 4 can slide in multiple directions, but the sliding range is larger when sliding along the concave arc surface -5. When sliding perpendicular to the concave arc surface -5, the joint slider can be subjected to a greater pushing and resetting force for rapid resetting. Compared with the friction pendulum support that controls the joint slider to slide in the lateral and longitudinal directions, the support plate frame 4 in this application can slide in a large range in one direction and in a small range in other directions, thereby elastically limiting the sliding range of the joint slider.

[0020] like Figs. 4-7As shown, the joint slider includes a clamping plate 7, a slider pad 8, and a sliding plate 9. The clamping plate 7 has multiple through holes. Two slider pads 8 are detachably connected to both sides of the clamping plate 7. Two sliding plates 9 are detachably connected to the clamping plate 7. The two sliding plates 9 are respectively located on the side of the two slider pads 8 away from the clamping plate 7. The sliding plates 9 contact the concave arc surface 5. On both sides of the sliding plates 9 near the two concave arc surfaces 6, there are arc surfaces corresponding to the concave arc surfaces 6, allowing the sliding plates 9 to contact the concave arc surfaces 6. The model of the slider pad 8 that matches the bearing plate frame 4 is used, and the model of the sliding plate 9 is also selected. It can be selected according to the different bearing plate frames 4. The slider pads 8 and sliding plates 9 on both sides of the clamping plate 7 are respectively set to correspond to the upper and lower sides of the bearing plate frames 4. The slider pads 8 and sliding plates 9 on both sides are also set vertically. When different settings are made for the transverse and longitudinal vibration reduction of the bridge, the bearing plate frame 4, slider pads 8 and sliding plates 9 can be set accordingly, so as to adjust the transverse and longitudinal vibration reduction effects respectively.

[0021] like Figs. 4-6 As shown, the sliding limiting mechanism includes a trapezoidal support 10 and shock-absorbing pads 11. The trapezoidal support 10 is detachably connected to the upper embedded steel plate 1 or the lower embedded steel plate 2. Multiple shock-absorbing pads 11 are fixedly connected to the trapezoidal support 10. The shock-absorbing pads 11 can contact the support plate frame 4. The shock-absorbing pads 11 on the multiple trapezoidal supports 10 can respectively contact the two sides of the support plate frame 4 near the two ends of the concave arc surface 5. The shock-absorbing pads 11 can dampen the sliding of the support plate frame 4 at opposite positions, for example, in... The support plate frame 4 fixed on the upper embedded steel plate 1 is parallel to the longitudinal direction of the bridge. When the bridge rotates in the longitudinal direction, the support plate frame 4 on the upper embedded steel plate 1 slides in the longitudinal direction on the joint slider. The trapezoidal support 10 on the lower embedded steel plate 2 dampens the sliding of the support plate frame 4 on the upper embedded steel plate 1 in the longitudinal direction. After the bridge rotation is restored, the damping pad 11 can also push the support plate frame 4 to reset. Compared with the traditional limiting method, it also reduces the shear force on the bolts fixing the support plate frame 4.

[0022] In this embodiment, the upper embedded steel plate 1 and the lower embedded steel plate 2 can be configured to provide different damping effects for the bridge in the longitudinal and transverse directions as needed. Different types of support plate frames 4 can be installed on the upper embedded steel plate 1 and the lower embedded steel plate 2. The concave arc surface 1 5 and the concave arc surface 2 6 inside have different curvatures. At the same time, the slider pad 8 and the sliding plate 9 are adjusted accordingly. When the bridge rotates, the joint slider can slide on the concave arc surface 1 5. When sliding in a direction perpendicular to the concave arc surface 1 5, both the slider pad 8 and the sliding plate 9 are in contact with the concave arc surface 2 6. The smaller curvature of the concave arc surface 2 6 can push the joint slider back to its initial position. When the bridge rotates, the damping rubber pad 2 11 on the trapezoidal support 10 can dampen the sliding of the support plate frame 4 in the opposite position and push it to reset, thereby satisfying the targeted settings for vibration in different directions.

[0023] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bridge longitudinal and transverse friction pendulum seismic isolation bearing, characterized in that, include: An embedded steel plate (1) is fixedly installed on the bridge; The lower embedded steel plate (2) is fixedly installed on the bridge support. The lower embedded steel plate (2) is aligned with the upper embedded steel plate (1). Support plate assemblies can be detachably installed on both the upper embedded steel plate (1) and the lower embedded steel plate (2). The two support plate assemblies are arranged opposite to each other, and a joint slider is slidably arranged between the two support plate assemblies. The two support plate assemblies press the joint slider, and the joint slider can slide on the two support plate assemblies. The upper and lower sides of the joint slider are respectively set as curved surfaces that cooperate with the two support plate assemblies; Multiple sliding limiting mechanisms are detachably connected to the upper embedded steel plate (1) and the lower embedded steel plate (2), respectively. The sliding limiting mechanism on the upper embedded steel plate (1) is in contact with the support plate assembly on the lower embedded steel plate (2), and the sliding limiting mechanism on the lower embedded steel plate (2) is in contact with the support plate assembly on the upper embedded steel plate (1). The sliding limiting mechanism is used to constrain the sliding of the bridge.

2. The bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 1, characterized in that, Both the upper embedded steel plate (1) and the lower embedded steel plate (2) have slots, and a shock-absorbing rubber pad (3) is provided in the slot. The support plate assembly is detachably installed in the slot and fits against the shock-absorbing rubber pad (3).

3. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 2, characterized in that, The support plate assembly includes: The support plate frame (4) is detachably installed in the slot. The support plate frame (4) is rectangular and is in contact with the sliding limiting mechanism. The concave arc surface (5) is located at the center of the support plate frame (4); Two concave arc surfaces (6) are provided in the support plate frame (4). The two concave arc surfaces (6) are respectively provided on both sides of the concave arc surface (5). The two concave arc surfaces (6) are tangent to the concave arc surface (5). The joint slider can slide along the concave arc surface one (5) and the joint slider can contact the concave arc surface two (6).

4. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 3, characterized in that, Both the second concave arc surface (6) and the first concave arc surface (5) are bent toward the side away from the support plate frame (4), and the bending radius of the second concave arc surface (6) is smaller than that of the first concave arc surface (5).

5. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 4, characterized in that, The range of the joint slider sliding on the first concave arc surface (5) is greater than the range of reciprocating sliding on the second concave arc surface (6) and the first concave arc surface (5).

6. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 5, characterized in that, The joint slider includes: The clamping piece (7) has multiple through holes; Two slider pads (8) are detachably connected to both sides of the clamping plate (7); Two sliding plates (9) are detachably connected to the clamping plate (7). The two sliding plates (9) are respectively set on the side of the two slider pads (8) away from the clamping plate (7). The sliding plate (9) is in contact with the first concave arc surface (5). The two sides of the sliding plate (9) near the second concave arc surface (6) are provided with arc surfaces corresponding to the second concave arc surface (6). The sliding plate (9) can contact the second concave arc surface (6).

7. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 6, characterized in that, The sliding limiting mechanism includes: The trapezoidal support (10) is detachably connected to the upper embedded steel plate (1) or the lower embedded steel plate (2); Multiple shock-absorbing rubber pads (11) are fixedly connected to the trapezoidal support (10), and the shock-absorbing rubber pads (11) can contact the support plate frame (4).

8. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 7, characterized in that, The shock-absorbing rubber pads (11) on the multiple trapezoidal supports (10) can respectively contact the two sides of the support plate frame (4) near the two ends of the concave arc surface (5).

9. A bridge longitudinal and transverse friction pendulum seismic isolation bearing according to claim 1, characterized in that, Multiple connecting steel frames (12) are fixedly connected between the upper embedded steel plate (1) and the lower embedded steel plate (2).

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