Displacement-amplified multi-dimensional energy-dissipating device to prevent plastic hinges at the end of bridge piers

Abstract

The invention discloses a displacement amplifying multi-dimensional energy consumption device for preventing plastic hinges at the ends of bridge piers, and belongs to the field of bridge disaster prevention and reduction and safety protection engineering. Including universal hinge support, open steel box, circular rigid steel connecting rod, curved composite energy-dissipating metal damper, fixed hinge support, foam filling, strip-shaped cross-braided metal damper, rigid steel connecting rod, Arc thin steel sheet, rectangular opening steel sheet, bolt, bridge deck, bridge pier. The present invention mainly adopts the idea of ​​displacement amplification, and under the action of earthquake, the bridge pier will produce slight displacement. The "lever-type" energy-dissipating member installed at the bottom of the pier and the bottom of the "scissor-type" energy-dissipating device on the upper part of the pier are enlarged to consume the energy transmitted by the earthquake. Energy-dissipating devices at the upper and lower parts of the pier are arranged along the circumference of the pier. The energy-dissipating devices installed at the upper and lower parts of the pier can consume the energy transmitted to the pier by the earthquake to the maximum extent, protect the pier and prevent plastic hinges from forming on the pier.

Description

technical field [0001] The invention belongs to the field of bridge disaster prevention and mitigation and safety protection engineering, and in particular relates to a displacement amplification multi-dimensional energy consumption device for preventing plastic hinges at the ends of bridge piers. Background technique [0002] Earthquake is a serious and unpredictable natural disaster faced by human society. Earthquake disaster can cause damage to buildings and cause huge losses. my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt, and is one of the most earthquake-prone countries in the world. [0003] Bridges are an important part and weak link of traffic engineering, and they are also the objects that need to be protected during the operation of traffic engineering. And the earthquake resistance of bridges has always been a problem that people attach great importance to, so as to ensure that the bridge has a good anti-seismic effec...

AI Technical Summary

Problems solved by technology

The appearance of the plastic hinge of the bridge pier will reduce the bearing capacity, stiffness and shear resistance of the bridge pier, which will have a huge adverse effect on the stability of the bridge.

The traditional anti-seismic method of structures resists earthquake action by enhancing the anti-seismic performance of the structure itself, that is, the structure itself stores and consumes seismic energy. This is a passive anti-seismic countermeasure, and the effect and economy are very poor.

[0004] The traditional energy dissipation and shock absorption of bridge piers is mainly achieved by directly adding viscous dampers or metal dampers to the upper part of the bridge piers and the bottom of the bridge deck, installing lock-up devices at the ends of the bridge piers, and installing diagonal braces with dampers at the bottom of the bridge piers, etc. However, under the action of earthquakes, the local curvature of the plastic hinges at the upper and lower ends of the bridge pier is relatively large, but the horizontal displacement is relatively small, which makes the traditional energy dissipation method unable to fully play its role under moderate earthquakes, and the efficiency is low

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