Lateral vibration dampers for bridge structures

Abstract

The invention relates to a lateral shock absorption damper suitable for a bridge structure. A triangular steel plate adopts a soft steel with good plasticity, the characteristics that a triangular plate has a total cross section and reaches the yielding energy consumption are utilized, so that the utilization rate of the energy consumption of the basic components of the triangular steel plate can be maximized. A lateral structure that spherical crown surfaces and smooth surfaces are alternatively arranged is arranged between the components of the triangular steel plate so as to transfer horizontal lateral earthquake force, the application points of the spherical crown surfaces and the smooth surfaces can freely slide, the lateral structure can clearly define the lateral stress application points of the triangular steel plate, and the longitudinal displacement requirements of a main beam can also be satisfied. The lateral shock absorption damper is a novel shock absorption and energy consumption metal damping device which has stable performance, comprehensive functions and low cost, not only can satisfy the lateral static load and wind load requirements on the bridge structure in the normal suitable state, but also can be cooperated with a longitudinal damper, so that the required longitudinal displacement requirement is met, and thus, shock absorption and energy consumption are carried along the lateral bride direction of the bridge structure.

Description

technical field [0001] The invention belongs to the technical fields of civil engineering and earthquake engineering, and specifically relates to a passive damping device arranged on the pier tops of various bridge structures (or at the lower beam of the main tower of a cable-stayed bridge), which is used to reduce the main girder under strong earthquakes. The transverse inertial force transmitted to the bridge piers (towers) controls the lateral relative displacement between the piers (towers) and the main girder, and at the same time can adapt to the longitudinal deformation of the bridge under normal loads and earthquakes. Background technique [0002] In recent years, earthquakes have occurred frequently around the world, from Wenchuan, Haiti, Chile to the Yushu earthquake, which have occurred continuously. According to the forecast of experts from my country Seismic Network Center, the world is currently in an active period of earthquakes, and this active period may las...

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Problems solved by technology

For example, the lead-core rubber bearing has strong energy dissipation capacity, and the secondary internal force of the bearing caused by creep deformation such as temperature and creep is small, but the shear performance of the bearing is greatly affected by the vertical load, and as the lead core The self-recovery ability of the bearing is gradually weakened, and it cannot exert its effective damping performance in the earthquake with multi-spectrum effect

For example: FPS (friction pendulum system) has strong self-recovery ability and stable frictional energy dissipation performance, but in the process of frictional energy consumption, it will cause the vertical displacement of the beam end to generate secondary internal force, and its frictional energy consumption depends on the vertical Support reaction force, for the side piers of cable-stayed bridges, the vertical support reaction force is relatively small, so its frictional energy dissipation capacity is limited

For example: although the viscous liquid damper has good shock absorption and isolation performance in the longitudinal bridge direction, if the viscous liquid damper is installed in the transverse bridge direction and the longitudinal bridge direction at the same time, the vertical and horizontal The force under the bridge is very complicated, and the concept of seismic calculation is not clear, so if the structure is not specially designed, it is not suitable to install viscous liquid dampers in the direction of the transverse bridge.

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