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高墩大跨连续刚构桥梁的抗震性能是桥梁设计人员重点关注的问题.当高墩处于深水之中,由于桥墩外围的水和桥墩体内的水将由于震动而同时对桥墩产生作用,对其进行动力响应分析更为困难.在计算墩水耦合效应时采用Westergaard理论,对一座连续刚构桥梁的地震动力响应进行了反应谱分析和时程分析.研究结果认为考虑墩水耦合效应后,桥梁的地震动力响应的变化不明显.
Seismic performance of continuous rigid-frame bridges with high piers and long-span bridges is a key issue for designers of bridges.When the high piers are in deep water, the water in the periphery of piers and the water in piers will affect the piers at the same time due to vibration It is more difficult to carry out dynamic response analysis.Westergaard theory is used in the calculation of the coupling effect between pier and water.The response spectrum analysis and time history analysis of a continuous rigid frame bridge under seismic dynamic response are carried out.The results show that after considering the coupling effect of pier and water, The dynamic response of the earthquake is not obvious.