地震序列作用下板式橡胶支座简支梁桥响应特点研究

Study on Response Characteristics of Simple-supported Beam Bridge with Plate Rubber Bearings under Earthquake Sequence

根据汶川地震中板式橡胶支座简支梁桥地震响应出现的新特点,结合桥梁抗震规范中的最新规定,对地震序列作用下板式橡胶支座简支梁桥的响应进行了分析研究。结果发现,在考虑强地震序列后,板式橡胶支座在历次地震作用下的残余位移将得到累计,从而降低了桥梁后续的抗震及运营能力。

According to the new characteristics of seismic response of simple-supported beam bridge with plate rubber bearing in Wenchuan Earthquake,combined with the latest provisions of bridge seismic code,the response of simple-supported beam bridge with plate rubber bearing under earthquake sequence is analyzed and studied.The result shows that after considering strong earthquake sequence,the residual displacement of plate rubber bearing under the action of previous earthquakes will be accumulated,which will reduce the subsequent seismic and operational capacity of the bridge.