Continuous beam bridge hierarchical control and bidirectional shock-resistant connecting damping device

Abstract

The invention relates to a continuous beam bridge hierarchical control and bidirectional shock-resistant connecting damping device. The continuous beam bridge hierarchical control and bidirectional shock-resistant connecting damping device comprises an upper sliding block, a lower sliding block, two or more inversed F-shaped components and a bottom plate; the top end of the upper sliding block is fixedly arranged at the bottom end of a beam body; the lower sliding block is positioned in the lower part of the upper sliding block; the bottom end of the lower sliding block is fixed with the top end of the bottom plate; a friction layer is arranged between the bottom end of the lower sliding block and the top end of the bottom plate. The continuous beam bridge hierarchical control and bidirectional shock-resistant connecting damping device is a novel large-tonnage continuous beam bridge damping device which is simple in structure, economic and durable, and convenient to check and maintain; the continuous beam bridge hierarchical control and bidirectional shock-resistant connecting damping device can provide new design concept and technical thinking for design of a new bridge and strengthening of an old bridge, and is suitable for newly building of the bridge and aseismic strengthening of the old bridge.

Description

technical field [0001] The invention relates to a continuous girder bridge hierarchical control, two-way anti-seismic connecting shock absorbing device, which belongs to the field of bridge shock absorbing and isolating, and is suitable for the new anti-seismic design of highway bridges, railway bridges, urban bridges and various large continuous beam structures and existing Seismic reinforcement of buildings. Background technique [0002] In current highway bridges, railway bridges, urban bridges and various large-scale continuous beam structures, in order to meet the displacement requirements caused by temperature loads, each link of continuous beam bridges is often provided with only one fixed pier, which not only makes the seismic capacity of the fixed pier difficult It meets the seismic requirements, and also makes the longitudinal seismic displacement response of continuous girder bridges larger, which can easily cause damage to expansion joints and supports, and even ...

AI Technical Summary

Problems solved by technology

The Lock-up device uses the relative motion speed of the beam and pier as an index to determine the timing of locking. In theory, it can realize the coordinated force of each pier, but its high cost and complicated maintenance in the later period make its application less

Although some existing inventive devices can realize the locking function of the movable pier and the girder body and reduce the seismic response of the fixed pier and the girder body, due to the fixed connection stiffness, when the movable pier and the girder body are locked, the natural vibration period of the whole bridge will be shortened As a result, the overall seismic response of the whole bridge increases. In addition, due to the structural characteristics and the limitation of the mechanism, there is a gap in the existing locking device. Increasing the overall seismic response to a certain extent is not conducive to maximizing the aseismic performance of continuous girder bridges, and it is not easy to achieve energy dissipation and shock absorption

The above damping devices do not take into account the vertical seismic action. For long-span continuous girder bridges, due to the large span and small vertical stiffness, the impact of vertical seismic action on the bridge cannot be ignored

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