Multi-way shock absorbing device for bridge pier

Abstract

The invention discloses a multi-way shock absorbing device for a bridge pier. The multi-way shock absorbing device for the bridge pier comprises an inner layer connecting plate and an outer layer fixing-supporting plate. The inner layer connecting plate and the outer layer fixing-supporting plate are detachably arranged on a pier column bearing platform and are arranged in the circumferential direction of the outer surface of a pier column. A plurality of elastic-plastic deformational components are uniformly distributed between the inner layer connecting layer and the outer layer fixing-supporting plate in the radial direction of the pier column section. Under the condition of usual using, the shock absorbing device keeps elastic, and normal operation of the bridge pier is not affected. Under the action of seismic loads, horizontal displacement of the bridge pier body occurs. When the bridge pier is overly displaced, the shock absorbing device yields, and an outer support device stillstays elastic. The shock absorbing device conducts reciprocation hysteretic energy dissipation through elastic-plastic deformation, so that the earthquake energy is dissipated, and the bridge pier horizontal displacement is reduced. The multi-way shock absorbing device of the column bridge pier is low in price, can be prefabricated in a factory, and can be assembled quickly in a construction sitewithout affecting normal using of the bridge. Moreover, the multi-way shock absorbing is convenient to replace after an earthquake, and can also be used as an anti-collision device of the pier bottom.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a multi-directional damping device for bridge piers. Background technique [0002] Small and medium-span beam bridges are widely used in my country and are an extremely important part of my country's increasingly developed road traffic network. Cylindrical pier is one of the substructure forms commonly used in this type of bridge. The cylindrical pier is consolidated with the cap, and the load transmitted from the upper structure of the bridge is finally transmitted to the foundation through the cylindrical pier, so that the entire bridge structure can maintain normal use. At present, my country's current "Seismic Design Rules for Highway Bridges" and "Code for Seismic Design of Urban Bridges" stipulate that small and medium-span girder bridges are required to maintain elasticity under E1 earthquakes, damage is allowed under E2 earthquakes, and plastic hinges are allowed on bridge piers. ...

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Problems solved by technology

However, both of these two methods have certain shortcomings: the first method requires the installation of expensive shock-absorbing and isolating supports, and the installation of shock-absorbing and isolating devices requires that there must be enough space between the piers and beams, and traffic must be suspended when replacing , but this method has no obvious shock-absorbing effect on piers with high pier height and high mass; when the second method is implemented, traffic needs to be interrupted. If concrete is used, the poured concrete needs to be cured. The entire reinforcement period is long. If steel pipes are used, the connection performance between steel pipes and concrete is not easy to be guaranteed. Finally, this method will increase the seismic requirements of the cap foundation, which may cause damage to the cap foundation under the action of earthquakes.

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