Shock absorption and isolation support with double-damping energy dissipation function

Abstract

The utility model discloses a seismic mitigation and isolation support with a double-damping energy dissipation function. A traditional shock absorption and isolation support is poor in shock absorption effect and complex in replacement process. The support comprises an upper support plate, wherein a spherical crown lining plate is arranged below the upper support plate; a plane sliding friction pair is arranged between the upper support plate and the spherical crown lining plate; a sliding plate is arranged below the spherical crown lining plate, and a spherical sliding friction pair is arranged between the spherical crown lining plate and the sliding plate; a lower support plate is arranged below the sliding plate, and a plane sliding friction pair is arranged between the sliding plate and the lower support plate; and the sliding plate is connected with the lower support plate through a spiral steel damping element. The force borne by the support acts on the spiral steel damping element connected with the support, steel damping and friction damping energy consumption is achieved, earthquake loads are buffered, and damage to the support is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge bearings, and in particular relates to a seismic isolation bearing with double damping and energy dissipation. Background Art

[0002] Traditional earthquake disasters are sudden and destructive, and their strong impact often causes serious damage to bridges and other building structures, resulting in huge losses of life and property. Therefore, it is very necessary to use seismic isolation bearings on bridge structures to ensure that the bridge beams will undergo a certain displacement, rotation, and swing on the bearings during an earthquake, maximizing the consumption of earthquake energy, thereby reducing the destructive effects of earthquake impacts on bridges and other building structures.

[0003] my country is located between the Pacific Rim Seismic Belt and the Eurasian Seismic Belt. Due to the squeezing of the Pacific Plate, the Indian Plate and the Philippine Sea Plate, the seismic fault zone is very active. During an earthquake, the bridge structure instantly bears a large load, resulting in a large relative displacement between the beam piers. When the relative displacement exceeds the beam end shelving length, the beam will fall, causing irreparable and serious damage to the bridge structure.

[0004] The bridge bearing is an important connecting bearing erected on the top surface of the pier to support the superstructure of the bridge. Its function is to fix the superstructure to the pier, bear various forces acting on the superstructure, and reliably transmit them to the pier; under the action of load, temperature, concrete shrinkage and creep, the bearing adapts to the rotation and displacement of the superstructure, so that the upper part can deform freely without generating additional internal forces. During the reciprocating sliding process, the existing seismic isolation bearing dissipates the seismic energy through the friction resistance of the sliding surface to achieve the seismic isolation effect. The traditional seismic isolation bearing has poor shock absorption effect, and the replacement process is complicated. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a seismic isolation bearing with double damping energy dissipation, which can realize double damping energy dissipation, and the spiral steel damping element is easy to replace.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A seismic isolation bearing with double damping and energy dissipation, characterized in that:

[0008] It comprises an upper support plate, a spherical crown lining plate is arranged below the upper support plate; a plane sliding friction pair is arranged between the upper support plate and the spherical crown lining plate;

[0009] A sliding plate is arranged below the spherical crown lining plate, and a spherical sliding friction pair is arranged between the spherical crown lining plate and the sliding plate;

[0010] A lower support plate is arranged below the sliding plate, and a plane sliding friction pair is arranged between the sliding plate and the lower support plate;

[0011] The sliding plate is connected to the lower support plate through a spiral steel damping element.

[0012] Furthermore, the spiral steel damping element is spiral in the vertical direction, with a lower anchoring structure at the bottom and an upper anchoring structure at the top; the projections of the lower anchoring structure and the upper anchoring structure in the plane direction are symmetrically arranged; the upper anchoring structure is connected to the sliding plate, and the lower anchoring structure is connected to the lower support plate.

[0013] Furthermore, a receiving groove is provided on the upper plane of the upper anchoring structure, and a receiving groove is provided on the lower plane of the lower anchoring structure; the pin block is embedded in the receiving groove and leaves an exposed height; a receiving groove is provided on the lower plane of the sliding plate, and a receiving groove is provided on the upper plane of the lower support plate; the spiral steel damping element is respectively connected to the sliding plate and the lower support plate through the pin block and the anchor bolts.

[0014] Furthermore, a plane sliding friction pair including a plane friction plate is arranged between the upper support plate and the spherical crown lining plate, and a first receiving groove is arranged on the top surface of the spherical crown lining plate, and the plane friction plate is embedded in the first receiving groove for fixing and installing the position of the plane friction plate;

[0015] A stainless steel plate is welded to the lower plane of the upper support plate, and the stainless steel plate and the plane friction plate form a plane friction pair to achieve temperature-dependent displacement of the support in the horizontal direction.

[0016] Further, the spherical sliding friction pair between the spherical cap lining plate and the sliding plate includes a spherical friction plate;

[0017] The bottom of the spherical crown lining plate is a downward convex spherical surface, and the top of the sliding plate is an upward concave spherical surface;

[0018] A second receiving groove is arranged on the upper concave spherical surface of the sliding plate, and the spherical friction plate is embedded in the second receiving groove;

[0019] A spherical stainless steel plate is welded to the lower convex spherical surface of the spherical crown lining plate, and the spherical stainless steel plate and the spherical friction plate form a spherical friction pair.

[0020] Further, the planar sliding friction pair between the sliding plate and the lower support plate includes a core friction plate;

[0021] A third accommodating groove is provided on the bottom surface of the sliding plate, and the core friction plate is embedded in the third accommodating groove, which is used for fixing and installing the position of the core friction plate 14;

[0022] A stainless steel plate is welded to the upper plane of the lower support plate, and the stainless steel plate and the core friction plate form a plane friction pair.

[0023] Furthermore, a longitudinal bridge groove is provided at the bottom of the sliding plate, and the tenon is provided in the longitudinal bridge groove; a limit block is provided on the outer side of the longitudinal bridge of the sliding plate;

[0024] The tenon and the lower support plate are connected by a shear pin, and the limit block and the lower support plate are connected by a shear bolt.

[0025] Furthermore, a lower support plate anti-falling beam stopper is provided at the longitudinal bridge edge of the lower support plate.

[0026] Furthermore, a guide sliding friction pair is provided between the sliding plate and the upper support plate along the height direction;

[0027] When the temperature-dependent displacement in the longitudinal direction of the bridge is designed, no guide friction pair is set in the longitudinal direction, and a gap in the longitudinal direction of the bridge is set to meet the temperature-dependent displacement in the longitudinal direction of the bridge; when the temperature-dependent displacement in the transverse direction of the bridge is designed, no guide friction pair is set in the transverse direction, and a gap in the transverse direction of the bridge is set to meet the temperature-dependent displacement in the transverse direction of the bridge.

[0028] Beneficial effects of the utility model:

[0029] 1) Compared with other seismic isolation bearings, the vertical bearing capacity of the utility model can meet the requirements, and the horizontal energy dissipation capacity has outstanding advantages. The structure increases the energy dissipation limit of the bearing, and in the form of energy transfer, the force borne by the bearing acts on the spiral steel damping element connected to the bearing, realizing steel damping and friction damping energy dissipation, buffering seismic loads, and reducing the destructiveness to the bearing;

[0030] 2) The utility model reduces the destructiveness of earthquakes to the bearings, which in turn reduces the destructiveness of earthquakes to the bridge itself, while reducing the frequency and cost of bearing replacement and improving the convenience of replacement. In particular, the spiral steel damping element is low in cost and easy to replace, which greatly reduces the use cost and replacement cost of the bearings;

[0031] 3) The spiral steel damping element of the utility model does not bear vertical bearing capacity, and the replacement and maintenance process does not affect the normal operation of the line, and the replacement and maintenance of the core steel damping element can be realized;

[0032] 4) The spiral steel damping element of the utility model is connected to the sliding plate and the lower support plate, and the spiral steel damping element located between the two ends at different vertical heights has a horizontal plane where the continuous area from the bottom end to the top end gradually increases in height, and the projection of the spiral steel damping element on the horizontal plane is an irregular axisymmetric figure. This scheme enables the spiral steel damping element to coordinate with the support to dissipate energy, and has an isotropic structure in all directions, resisting impact loads to achieve damping energy dissipation, and effectively reducing the damage and destruction of the bridge structure to the dynamic effects of earthquakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the seismic isolation support of the utility model;

[0034] Figure 2 This is a schematic diagram of the structure of the spiral steel damping element of the utility model;

[0035] Figure 3 This is a schematic diagram of the connection between the spiral steel damping element and the sliding plate of the utility model;

[0036] Figure 4 This is a cross-sectional view of the utility model in the transverse direction of the bridge;

[0037] Figure 5 This is a longitudinal cross-sectional view of the utility model;

[0038] In the figure: 1-upper support plate; 2-spherical crown lining plate; 3-sliding plate; 4-tenon; 5-lower support plate; 6-limiting block; 7-shear pin; 8-shear bolt; 9-spiral steel damping element; 10-pin block; 11-upper support plate block; 12-plane friction plate; 13-spherical friction plate; 14-core friction plate; 15-guide friction plate; 51-lower support plate anti-fall beam block; 91-upper anchoring structure of spiral steel damping element, 92-lower anchoring structure of spiral steel damping element; 93-accommodating groove. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with specific implementation methods.

[0040] like Figure 1 , 4 As shown in , 5, the utility model comprises an upper support plate 1, a spherical crown lining plate 2 is arranged below the upper support plate 1; a plane sliding friction pair is arranged between the upper support plate 1 and the spherical crown lining plate 2;

[0041] A sliding plate 3 is arranged below the spherical crown lining plate 2, and a spherical sliding friction pair is arranged between the spherical crown lining plate 2 and the sliding plate 3;

[0042] A lower support plate 5 is provided below the sliding plate 3, and a plane sliding friction pair is provided between the sliding plate 3 and the lower support plate 5;

[0043] A planar sliding friction pair is arranged between the upper support plate 1 and the spherical crown lining plate 2, including a planar friction plate 12. A first accommodating groove is arranged on the top surface of the spherical crown lining plate 2, and the planar friction plate 12 is embedded in the first accommodating groove for fixing and installing the position of the planar friction plate 12. A stainless steel plate is welded on the lower plane of the upper support plate 1, and the stainless steel plate and the planar friction plate 12 form a planar friction pair to realize the temperature-dependent displacement of the support in the horizontal direction.

[0044] The spherical sliding friction pair between the spherical crown lining plate 2 and the sliding plate 3 includes a spherical friction plate 13; the bottom of the spherical crown lining plate 2 is a lower convex spherical surface, and the top of the sliding plate 3 is an upper concave spherical surface; a second accommodating groove is arranged on the upper concave spherical surface of the sliding plate 3, and the spherical friction plate 13 is embedded in the second accommodating groove; a spherical stainless steel plate is welded to the lower convex spherical surface of the spherical crown lining plate 2, and the spherical stainless steel plate and the spherical friction plate 13 form a spherical friction pair, thereby ensuring the stable fitting rotation between the spherical friction plate 13 and the sliding plate 3, and realizing the longitudinal and lateral rotation angle functions of the support.

[0045] The planar sliding friction pair between the sliding plate 3 and the lower support plate 5 includes a core friction plate 14; a third accommodating groove is arranged on the bottom surface of the sliding plate 3, and the core friction plate 14 is embedded in the third accommodating groove, which is used for fixing and installing the position of the core friction plate 14; a stainless steel plate is welded on the upper plane of the lower support plate 5, and the stainless steel plate and the core friction plate 14 form a planar friction pair to realize displacement under earthquake conditions and provide friction damping energy dissipation; under the joint action of the three friction pairs, the support can achieve the displacement and rotation angle requirements under normal use and earthquake conditions.

[0046] The sliding plate 3 and the lower support plate 5 are connected via a spiral steel damping element 9, and the spiral steel damping element 9 is symmetrically arranged in the transverse direction of the support.

[0047] like Figure 2 As shown, the spiral steel damping element 9 is vertically spiral, with a lower anchoring structure 92 at the bottom and an upper anchoring structure 91 at the top; the projections of the lower anchoring structure 92 and the upper anchoring structure 91 in the plane direction are symmetrical; the upper anchoring structure 91 is connected to the sliding plate 3, and the lower anchoring structure 92 is connected to the lower support plate 5. The spiral steel damping element 9 is a spatial spiral structure, and the spiral steel damping element 9 is projected in the plane direction as an irregular axisymmetric figure. The cross section of the spiral steel damping element 9 can be rectangular, circular or other shapes, and the vertical overall structure is a spiral rise in the cross section, and a certain height difference is set between the starting point and the end point.

[0048] like Figure 3 As shown, a receiving groove 93 is provided on the upper plane of the upper anchoring structure 91, a receiving groove 93 is provided on the lower plane of the lower anchoring structure 92, the pin block 10 is embedded in the receiving groove and leaves an exposed height; a receiving groove is provided on the lower plane of the sliding plate 3, and a receiving groove is provided on the upper plane of the lower supporting plate 5; the spiral steel damping element 9 is connected to the sliding plate 3 and the lower supporting plate 5 as a whole through the pin block 10 and the anchor bolts, so that the core steel damping element can be quickly installed and disassembled during the installation stage and the post-earthquake maintenance stage.

[0049] The friction coefficients of the plane sliding friction pair between the upper bearing plate 1 and the spherical crown lining plate 2 and the spherical sliding friction pair between the spherical crown lining plate 2 and the sliding plate 3 are the same; the friction coefficient of the plane sliding friction pair between the sliding plate 3 and the lower bearing plate 5 is the largest. The friction coefficients of the plane friction plate 12 and the spherical friction plate 13 are not greater than 0.03 to ensure that the bearing has sufficient temperature-dependent displacement function to maintain normal operation. The friction coefficient of the core friction plate 14 is not greater than 0.07 to meet the requirements of seismic isolation for multi-level fortification earthquakes, meet the requirements that the bearing has sufficient horizontal stiffness and damping performance under earthquake conditions, and improve the seismic resistance of the bridge structure.

[0050] A longitudinal bridge groove is provided at the bottom of the sliding plate 3, and the tenon 4 is provided in the longitudinal bridge groove, and an installation gap is provided; a limit block 6 is provided on the longitudinal bridge outer side of the sliding plate 3, and an installation gap is provided between the sliding plate 3 and the limit block 6; the tenon 4 and the lower support plate 5 are connected by a shear pin 7, and the limit block 6 and the lower support plate 5 are connected by a shear bolt 8, so as to limit the relative displacement of the sliding plate 3 in the longitudinal and transverse directions. Under earthquake conditions, the force in the horizontal direction of the earthquake is transmitted through the upper structure of the bridge, and the impact load is transmitted in the order of the upper support plate 1, the sliding plate 2, the tenon 4 or the limit plate 6. At this time, the shear pin or the shear bolt 7 and the shear pin or the shear bolt 8 are sheared, and the limiting function is lost, and the sliding plate 3 and the lower support plate 5 slide relative to each other, realizing the relative displacement in the longitudinal and transverse directions.

[0051] The lower support plate 5 is provided with a lower support plate anti-falling beam stopper 51 at the longitudinal edge of the bridge, and the top surface of the lower support plate anti-falling beam stopper 51 is higher than the top surface of the limit block 6. The load generated by the beam body under temperature change and earthquake conditions is transmitted along the upper support plate stopper 11, the sliding plate 3, the limit block 6, and the lower support plate 5. When no displacement is set in the longitudinal direction of the bridge, a guiding friction pair is set; when displacement needs to be set in the longitudinal direction of the bridge, a gap is set between the upper support plate block and the sliding plate to meet the longitudinal displacement requirement, and the first friction pair set on the upper plane is realized; when an earthquake occurs, the gap set between the upper support plate block 11 and the sliding plate 3 cannot be met, the shear pin 7 or the shear bolt 8 set on the limit plate is sheared off, and the sliding plate 3 and the lower support plate 5 interact with each other to consume the earthquake energy and displace to the lower support plate anti-drop beam block 51. The lower support plate anti-drop beam block 51 is a fixed part. At this time, the lower support plate anti-drop beam block 51 is a force-bearing component, which can withstand the impact force of the beam body, and can effectively resist and absorb the impact force to prevent the beam body from falling off, thereby ensuring driving safety.

[0052] A guide sliding friction pair is provided between the sliding plate 3 and the outer side of the upper support plate 1 along the height direction;

[0053] When the temperature-dependent displacement in the longitudinal direction of the bridge is designed, no guide friction pair is set in the longitudinal direction, and a gap in the longitudinal direction of the bridge is set to meet the temperature-dependent displacement in the longitudinal direction of the bridge; when the temperature-dependent displacement in the transverse direction of the bridge is designed, no guide friction pair is set in the transverse direction, and a gap in the transverse direction of the bridge is set to meet the temperature-dependent displacement in the transverse direction of the bridge.

[0054] In the longitudinal bridge direction, an upper support plate stopper 11 is arranged below the upper support plate 1, and a guide friction plate is arranged between the upper support plate stopper 11 and the sliding plate 3, which is used as a fixed support; no guide friction plate is arranged between the upper support plate stopper 11 and the sliding plate 3 in the longitudinal bridge direction, and a longitudinal displacement gap is arranged, and the longitudinal displacement gap enables it to have a longitudinal displacement function, and is used as a longitudinal movable support; no guide friction plate is arranged between the upper support plate stopper 11 and the sliding plate 3 in the transverse bridge direction, and a transverse displacement gap is arranged, and the transverse displacement gap enables it to have a transverse displacement function, and is used as a transverse movable support.

[0055] Under normal working conditions, the deformation of the beam body caused by temperature changes is realized by the first friction pair set between the lower plane of the upper support plate 1 and the upper plane of the spherical cap lining plate 2; the rotation angle of the beam body is realized by the second friction pair set between the lower spherical surface of the spherical cap lining plate 2 and the upper spherical surface of the sliding plate 3;

[0056] Under earthquake conditions, the seismic load is transferred from the beam body to the sleeve at the bottom of the beam, and then transferred inside the support according to the upper support plate 1, the upper support plate block 11, the sliding plate 3, the limit block 6, and the lower support plate 5, and then transferred from the pier top sleeve to the pier. The effect is achieved after the load is transferred. The seismic load is transferred to the pier through the support and the anchoring system. During the whole process, the limit block 6 and the tenon 4 are subjected to impact loads, and the shear pin 7 or the shear bolt 8 cannot withstand the horizontal force and is sheared, and the sliding plate 3 and the lower support plate 5 are relatively displaced;

[0057] The lower plane of the sliding plate 3 and the upper plane of the lower support plate 5 are in sliding contact in the vertical direction through the third friction pair. While the third friction pair frictionally damps and dissipates energy, the spiral steel damping element 9 dissipates energy horizontally through elastic-plastic deformation to resist seismic energy.

[0058] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The content of the utility model is not limited to the examples listed, and any equivalent changes made to the technical solution of the utility model by ordinary technicians in this field after reading the specification of the utility model are covered by the claims of the utility model.

Claims

1. A seismic isolation bearing with double damping and energy dissipation, characterized in that: It comprises an upper support plate (1), a spherical cap lining plate (2) is arranged below the upper support plate (1); a plane sliding friction pair is arranged between the upper support plate (1) and the spherical cap lining plate (2); A sliding plate (3) is arranged below the spherical crown lining plate (2), and a spherical sliding friction pair is arranged between the spherical crown lining plate (2) and the sliding plate (3); A lower support plate (5) is arranged below the sliding plate (3), and a plane sliding friction pair is arranged between the sliding plate (3) and the lower support plate (5); The sliding plate (3) and the lower support plate (5) are connected via a spiral steel damping element (9).

2. The seismic isolation bearing with double damping and energy dissipation according to claim 1 is characterized in that: The spiral steel damping element (9) is spiral-shaped vertically, with a lower anchoring structure (92) arranged at the bottom and an upper anchoring structure (91) arranged at the top; the lower anchoring structure (92) and the upper anchoring structure (91) are symmetrically arranged in terms of their projections in the plane direction; the upper anchoring structure (91) is connected to the sliding plate (3), and the lower anchoring structure (92) is connected to the lower support plate (5).

3. The seismic isolation bearing with double damping and energy dissipation according to claim 2 is characterized in that: The upper plane of the upper anchoring structure (91) is provided with a receiving groove (93), the lower plane of the lower anchoring structure (92) is provided with a receiving groove (93), the pin block (10) is embedded in the receiving groove and leaves an exposed height; the lower plane of the sliding plate (3) is provided with a receiving groove, and the upper plane of the lower support plate (5) is provided with a receiving groove; the spiral steel damping element (9) is connected to the sliding plate (3) and the lower support plate (5) respectively through the pin block (10) and the anchor bolts.

4. The seismic isolation bearing with double damping and energy dissipation according to claim 1 is characterized in that: A plane sliding friction pair is arranged between the upper support plate (1) and the spherical crown lining plate (2), including a plane friction plate (12); a first receiving groove is arranged on the top surface of the spherical crown lining plate (2), and the plane friction plate (12) is embedded in the first receiving groove for fixing and installing the position of the plane friction plate (12); A stainless steel plate is welded to the lower plane of the upper support plate (1), and the stainless steel plate and the plane friction plate (12) form a plane friction pair to achieve temperature-dependent displacement of the support in the horizontal direction.

5. The seismic isolation bearing with double damping and energy dissipation according to claim 1 is characterized in that: The spherical sliding friction pair between the spherical crown lining plate (2) and the sliding plate (3) comprises a spherical friction plate (13); The bottom of the spherical crown lining plate (2) is a downward convex spherical surface, and the top of the sliding plate (3) is an upward concave spherical surface; A second accommodating groove is arranged on the upper concave spherical surface of the sliding plate (3), and the spherical friction plate (13) is embedded in the second accommodating groove; A spherical stainless steel plate is welded to the lower convex spherical surface of the spherical crown lining plate (2), and the spherical stainless steel plate and the spherical friction plate (13) form a spherical friction pair.

6. The seismic isolation bearing with double damping and energy dissipation according to claim 1 is characterized in that: The plane sliding friction pair between the sliding plate (3) and the lower support plate (5) comprises a core friction plate (14); A third accommodating groove is provided on the bottom surface of the sliding plate (3), and the core friction plate (14) is embedded in the third accommodating groove for fixing and installing the position of the core friction plate (14); A stainless steel plate is welded to the upper plane of the lower support plate (5), and the stainless steel plate and the core friction plate (14) form a plane friction pair.

7. The seismic isolation bearing with double damping and energy dissipation according to claim 6 is characterized in that: A longitudinal bridge groove is provided at the bottom of the sliding plate (3), and the tenon (4) is provided in the longitudinal bridge groove; a limit block (6) is provided on the longitudinal bridge outer side of the sliding plate (3); The tenon (4) and the lower support plate (5) are connected via a shear pin (7), and the limit block (6) and the lower support plate (5) are connected via a shear bolt (8).

8. The seismic isolation bearing with double damping and energy dissipation according to claim 7 is characterized in that: A lower support plate anti-falling beam stopper (51) is provided at the longitudinal edge of the lower support plate (5).

9. The seismic isolation bearing with double damping and energy dissipation according to claim 8, characterized in that: A guide sliding friction pair is provided between the sliding plate (3) and the upper support plate (1) along the height direction; When the temperature-dependent displacement in the longitudinal direction of the bridge is designed, no guide friction pair is set in the longitudinal direction, and a gap in the longitudinal direction of the bridge is set to meet the temperature-dependent displacement in the longitudinal direction of the bridge; when the temperature-dependent displacement in the transverse direction of the bridge is designed, no guide friction pair is set in the transverse direction, and a gap in the transverse direction of the bridge is set to meet the temperature-dependent displacement in the transverse direction of the bridge.

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