Ⅷ度区连续钢混组合梁桥抗震支座选型

Selection of Seismic Supports for Continuous Steel-concrete Composite Beam Bridges in Zone VIII

摘要:

以（42+60+42） m跨径的变截面钢混组合梁为例，采用MIDAS Civil有限元软件对桥梁进行时程分析，在桥梁设置有效防落梁设施的前提条件下，对桥梁边墩的抗震支座进行比选，涉及板式橡胶支座、滑板支座、高阻尼支座3种类型支座，以墩柱内力、梁端位移、工程费为评判标准，得到最合适的边墩支座，为同类桥梁的合理抗震设计提供参考。

Abstract:

Taking the variable cross-section steel-concrete composite beam with the span of (42+60+42) m as an example, MIDAS Civil finite element software is used to perform the time history analysis on the bridge. Under the premise of setting up the effective anti-falling beam facilities on bridges, the seismic supports for side piers of the bridge are compared and selected involving three types of supports such as plate rubber support, sliding plate support and high damping support. The most suitable side pier supports are obtained by evaluating the internal forces of pier columns, the beam end displacement and the engineering costs, which provides the reference for the rational seismic design of similar bridges.