Pulling-resistant friction isolation bearing for bridge

Abstract

The invention relates to a pulling-resistant friction isolation bearing for a bridge. The pulling-resistant friction isolation bearing comprises upper and lower bearing plates, upper and lower sliding bodies, a slider and a pulling-resistant housing, wherein the concave curved surface of the upper bearing plate is connected with the upper convex curved surface of the upper sliding body; a metal plate is arranged on the concave curved surface of the lower bearing plate; the concave curved surface of the lower bearing plate is connected with the lower convex curved surface of the lower sliding body; the upper sliding body is connected with the lower sliding body through the slider in the middle; the upper sliding body, the slider and the lower sliding body are arranged in the pulling-resistant housing; and the two side surfaces of the upper sliding body and the lower sliding body are connected with the inner wall of the pulling-resistant housing. The pulling-resistant friction isolation bearing adapts to deformation of the bridge under the action of a normal load, has the characteristics of rigidity and damping adaptivity, is strong in vertical pulling-resistant capability, meets the seismic performance requirements of the bridge under different fortification levels, is simpler in structure, high in vertical bearing capacity, large in horizontal displacement and good in durability and pulling resistance, and is suitable for the bridge with high seismic performance requirements.

Description

technical field [0001] The invention relates to a bridge support device, which is a friction and shock-isolation support for a pull-out bridge that can meet the pull-out resistance requirements and has variable stiffness and variable damping characteristics and is applied in the field of bridge engineering. Background technique [0002] my country is located between the circum-Pacific seismic belt and the Eurasian seismic belt. Most of the country's territory is an earthquake zone, especially the western part of my country is mostly a strong earthquake zone with frequent seismic activities. The construction of such a large number of bridges in my country is inevitable. Bring new challenges to bridge design. In order to reduce the potential earthquake threat, the aseismic design must be carried out for the bridges built in the strong earthquake area. Among them, the isolation design is one of the effective ways to reduce the earthquake damage of the bridge. In most cases, the...

AI Technical Summary

Problems solved by technology

However, most of the existing friction pendulum bearings currently only have a single friction surface. During the movement of the bearing, the displacement capacity is small, the curvature radius and friction coefficient are relatively single, and they do not have the self-adaptability of stiffness and damping.

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