摘要
随着深水桥梁的不断增多,地震引起的动水力对水中结构的影响不容忽视。文章以某一高桩承台基础为工程背景,利用"m"法和附加质量法来模拟桩-土及动水压力作用,建立三维模型,分析地震引起的动水力对桩基础动力特性和地震响应的影响程度,进一步研究不同深度动水力对高桩承台桩基础地震响应的变化规律。研究结果表明:动水力对结构地震特性有较大影响,深水桥梁抗震设计时动水作用不可忽略。
At present, the bridges in deep water are constantly constructed, the influences of hydrodynamic action caused by earthquake to structure in water can＇t be neglected. Based on a high pile cap foundation project, using m method and additional mass method to simulate the pile-soil interaction and hydrodynamic pressure action, establishing the three- dimensions to analyze the degree of effect of the earthquake-induced hydrodynamic force on dynamic characteristics and seismic response of elevated pile foundation, as well as the change rule of hydrodynamic force under different water depths to seismic response of high pile foundationResuhs show that the hydrodynamic force has great influence on structure seismic characteristics, so the hydrodynamic force should not be neglected in seismic design of the bridge in deep water.
作者
刘卫华
LIU Weihua(China Railway Fifth Survey And Design Institute Group Co. ,Ltd. , Beijing 102600, China)
出处
《高速铁路技术》
2017年第4期74-78,共5页
High Speed Railway Technology
关键词
高桩承台桩基础
桩-土作用
动水力
动力特性
地震响应
elevated pile cap foundation
pile-soil interaction
hydrodynamic force
dynamic characteristics
seismic response
