A connection damping device for continuous girder bridges with hierarchical control and two-way seismic resistance

Abstract

The invention relates to a continuous girder bridge graded control, two-way anti-seismic connection damping device, which includes an upper slider, a lower slider, more than two inverted F-shaped members and a bottom plate; the top of the upper slider is fixedly installed on the bottom of the beam body end, the lower slider is located in the lower part of the upper slider, the bottom of the lower slider is fixed to the top of the bottom plate, and a friction layer is set between the bottom of the lower slider and the top of the bottom plate. A large-tonnage continuous girder bridge damping device; the invention can provide new design concepts and technical ideas for the design of new bridges and the reinforcement of old bridges, and is suitable for new bridge construction and seismic reinforcement of old bridges.

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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