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高等级公路采用了许多大跨度连续刚构跨越河谷和深沟,汶川地震的桥梁震害启示,给桥梁抗震设计提出新的要求。采用时程反应分析法和振型分解反应谱法对主跨210m的连续刚构进行了抗震分析。分别计算了地震激励作用下纵桥方向和横桥方向的结构响应,为连续刚构桥梁抗震设计提供有益参考。
High-grade highways used many long-span continuous rigid structures across the river valley and deep-groove, Wenchuan earthquake damage to the bridge revelation, to the bridge seismic design put forward new requirements. The seismic analysis of the continuous rigid frame with a span of 210m is carried out by time-history analysis method and mode decomposition decomposition response spectrum method. The structural responses of the bridge in the direction of longitudinal bridge and transverse bridge under seismic excitation are calculated separately, which provides a useful reference for the seismic design of continuous rigid frame bridge.