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CN-122013657-A - Bridge anti-seismic support

CN122013657ACN 122013657 ACN122013657 ACN 122013657ACN-122013657-A

Abstract

The application discloses a bridge anti-seismic support, which relates to the technical field of bridge construction and comprises pier columns connected with a lower bridge structure, support plates connected with an upper bridge structure and a base fixed at the top of the pier columns, wherein a damping net is fixed between the pier columns and the support plates, the damping net is of an annular net structure, seismic energy is converted into elastic potential energy through deformation generated when the bridge vibration is extruded by the support plates, instantaneous impact is reduced, seismic force is dispersed through multidirectional deformation, and the technical effects of dynamically adapting different vibration intensities to adjust damping force, avoiding damage to the support and the bridge structure, expanding damping coverage, accurately and flexibly resetting, improving damping efficiency and anti-seismic effect, prolonging service life of the support and improving integral safety of the bridge can be realized.

Inventors

  • HUANG JUNJUN
  • CHEN YINGHUA
  • ZHANG LI
  • FENG AILING

Assignees

  • 上海通亿智慧装备科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The utility model provides a bridge anti-seismic support, includes pier stud (100) that are connected with lower part bridge structure, backup pad (110) that are connected with upper portion bridge structure, fixes base (130) at pier stud (100) top, its characterized in that: A damping net (200) is fixed between the pier stud (100) and the supporting plate (110), the damping net (200) is of an annular net structure, seismic energy is converted into elastic potential energy through deformation generated when the bridge vibrates and is extruded by the supporting plate (110), instantaneous impact is reduced, and seismic force is dispersed through multidirectional deformation.
  2. 2. The bridge anti-seismic support of claim 1, wherein a bump (120) is fixed at the bottom of the supporting plate (110), a concave cavity (131) is formed in the top of the base (130), the bump (120) is of a stepped arc-shaped structure, the concave cavity (131) is of a stepped groove structure matched with the bump (120), and damping blocks (132) are fixed at the stepped structures of the concave cavity (131).
  3. 3. The bridge anti-seismic support of claim 1, wherein the damping net (200) comprises three sections, namely a fixing layer (210), a supporting layer (220) and a deformation layer (230) from bottom to top, the fixing layer (210) is made of high-rigidity metal materials and is fixedly connected with the pier column (100), and the fixing layer (210), the supporting layer (220) and the deformation layer (230) are all connected with each other in a welding mode.
  4. 4. A bridge anti-seismic support according to claim 3, wherein the rigidity of the fixed layer (210), the supporting layer (220) and the deformation layer (230) is reduced from bottom to top in sequence, forming a gradient rigid integrated shock absorption system.
  5. 5. A bridge vibration-resistant support according to claim 3, wherein the deformation layer (230) is uniformly divided into a plurality of elastic net units (231) along the circumferential direction, the elastic net units (231) are of a net structure, damping bags (250) are fixed in the elastic net units, non-newtonian fluid is filled in the damping bags (250), and mechanical energy is quickly converted into heat energy under vibration or impact to perform damping.
  6. 6. The bridge anti-seismic support according to claim 4, wherein a balancing component for initial resetting after vibration of the damping net (200) is further arranged between the supporting layer (220) and the pier stud (100), and the balancing component comprises a bracket (240), an electromagnetic ring (241) and an annular belt (242); The support (240) is fixed on the pier column (100), the upper portion of the support is of an annular structure, an electromagnetic ring (241) is fixed on the inner side of the upper portion of the support (240), the annular belt (242) is fixed on the outer side of the supporting layer (220) and is filled with iron powder (243), and the iron powder (243) is subjected to circumferential magnetic attraction through electrifying of the electromagnetic ring (241), so that the supporting layer (220) of the damping net (200) is initially reset.
  7. 7. A bridge vibration-resistant support according to claim 5, wherein the elastic net unit (231) is uniformly divided into a plurality of cavities along the circumferential direction, a shock absorbing bag (250) is fixed in each cavity, the balance assembly further comprises an auxiliary assembly (260) arranged in the shock absorbing bag (250), and the auxiliary assembly (260) is used for assisting in resetting the deformation layer (230) deformed after vibration.
  8. 8. A bridge vibration-resistant support according to claim 7, wherein the auxiliary assembly (260) comprises a squeeze block (261), trigger pins (262) and microcapsules (264); The extrusion block (261) is fixed inside the shock-absorbing bag (250), the trigger needle (262) is fixed at the bottom of the shock-absorbing bag, the foaming agent is filled inside the micro-capsule (264), the extrusion block (261) is driven to move downwards through the vibration of the upper bridge of the supporting plate (110), the trigger needle (262) moves downwards to puncture the micro-capsule (264) so that the internal foaming agent flows out and is mixed with non-Newtonian fluid inside the shock-absorbing bag (250), the shock-absorbing bag (250) is promoted to expand, and the local position of the deformation layer (230) is further assisted to accurately reset.
  9. 9. The bridge vibration-resistant support according to claim 8, wherein a spring (263) is sleeved outside the trigger pin (262), the spring (263) is fixed below the extrusion block (261) and above the microcapsule (264), and slight vibration is resisted by the pretightening force of the spring (263) to prevent false triggering.
  10. 10. A bridge vibration-resistant support according to claim 8, wherein the microcapsules (264) are arranged up and down, and the trigger pins (262) move down at different vibration levels by different distances, so that different numbers of the microcapsules (264) are pierced to adapt to the reset of deformation displacement generated by different vibration levels of different areas.

Description

Bridge anti-seismic support Technical Field The invention relates to the technical field of bridge construction, in particular to a bridge anti-seismic support. Background The bridge is an artificial structure built for roads, railways, channels and the like to cross natural or artificial obstacles (such as rivers, valleys and unfavorable geology), and has the core function of ensuring smooth passing of vehicles, pedestrians and the like. As the 'throat' of the traffic system, the bridge is a key component of life line engineering and has irreplaceable functions in post-earthquake rescue, material transportation and economic recovery. Aiming at the vibration-resistant and vibration-absorbing treatment of bridges, the Chinese patent invention with the patent number of CN113914208B discloses a bridge vibration-resistant support, which comprises a pier column connected with a lower bridge structure and a support plate connected with an upper bridge structure, wherein the top of the pier column is provided with a base, the upper surface of the base is provided with an arc-shaped concave cavity, the top of the pier column is distributed with a plurality of bases, the tops of the bases are respectively and spherically hinged with a first connecting rod which is obliquely arranged, the ends of the first connecting rods are respectively and spherically hinged with a second connecting rod, torsion springs are arranged at the hinging positions, the bottom of the support plate is provided with arc-shaped bulges which extend into the concave cavity, the lower surface of the support plate is provided with a plurality of connecting parts, the connecting parts are respectively and spherically hinged with the corresponding ends of the second connecting rods, the upper surface of the pier column is provided with a plurality of connecting grooves, the connecting grooves are respectively internally provided with hydraulic energy dissipation devices, and the spherical hinges between the output ends of the hydraulic energy dissipation devices and the corresponding first connecting rods are connected with spherical hinges, and the vibration-resistant support rod vibration-absorbing effect is poor and the problem that the traction force can not be provided for the bridge. The scheme improves the damping effect to a certain extent when the bridge is damped, but in actual use, the damping device mainly depends on a single energy consumption mode (such as hydraulic pressure or friction), hydraulic energy consumption response is delayed under high-frequency vibration, so that bridge instantaneous impact damage is caused, when longitudinal wave and transverse wave superposition is processed, composite vibration of the superposition of the longitudinal wave and the transverse wave cannot be processed efficiently, resonance or stress concentration is easy to occur on the bridge under the high-frequency vibration, the damping and vibration-resistant effect is poor, a support can provide basic traction force in an earthquake, but a reset mechanism is passive, the reset precision is low, deformation caused by different earthquake levels cannot be adapted, and bridge dislocation residues are easy to be caused by aftershock interference. Disclosure of Invention The application provides the bridge anti-seismic support, which solves the technical problems that in the prior art, the damping effect is limited, the hydraulic energy consumption response is delayed under high-frequency vibration to cause bridge instantaneous impact damage, the composite vibration of longitudinal wave and transverse wave superposition cannot be processed efficiently to cause resonance or stress concentration, the resetting mechanism is passive, the precision is low, the bridge anti-seismic support cannot adapt to deformation of different vibration levels, and bridge dislocation residues are easily caused by interference of aftershocks, and the bridge anti-seismic support has the advantages of dynamically adapting to different vibration intensities to adjust damping force, avoiding damage of the support and bridge structures, expanding damping coverage, realizing accurate and flexible resetting, improving damping efficiency and anti-seismic effect, prolonging service life of the support and improving integral safety of the bridge. The application provides a bridge anti-seismic support, which comprises a pier column connected with a lower bridge structure, a support plate connected with an upper bridge structure and a base fixed at the top of the pier column, wherein the support plate is connected with the upper bridge structure; A damping net is fixed between the pier stud and the supporting plate, the damping net is of an annular net structure, and is deformed when being extruded by the supporting plate through bridge vibration, so that seismic energy is converted into elastic potential energy, instantaneous impact is reduced, and seismic force is dispersed through