地震和波浪联合作用下自由场海水动水压力分析  

Hydrodynamic pressures analysis of free field seawater under coaction of earthquak and wave

作　　者：杜修力[1] 雷枝 李亮[1] 王进廷[2] 

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《世界地震工程》2015年第3期1-9,共9页World Earthquake Engineering

基　　金：国家973计划项目(2011CB013600)

摘　　要：假定基岩为弹性半空间、海床土为流固饱和介质,研究了SV波斜入射条件下地震和波浪联合作用下自由场海水的动水压力反应问题。以输入El Centro地震动为例,结果表明:对于地震和波浪联合作用下的动水压力,无论是浅水或是深水情况,当波浪频率很小时,在一个波浪波长范围内的动水压力随水平位置的变化很小,随着波浪频率的增大,水平位置影响加强;波浪作用对联合动水压力的主导影响随波浪频率的增高在深水区变弱,此时,联合动水压力取决于相应频率地震动能量的大小。In this study, the bedrock was assumed to be elastic half - space medium, the seabed to be fluid-solid saturated medium. With SV waves oblique incidence, the change rules of hydrodynamic pressures for free field sea- water under coaction of earthquake and waves was examined. Taking E1 Centro ground motion as an example, the re- sults show that the effect of horizontal position on hydrodymic pressures for the coaction of earthquake and waves changes a little when the wave frequency is small, either shallow or deep water. As the wave frequency increases, the effect of horizontal position is significant. The major influence of wave action of the united hydrodynamic pres- sure in the deep water area changes weakens with wave frequency increasing. The united hydrodynamic pressure is depend on the seismic motion energy value of corresponding frequency at the deep water area.

关 键 词：地震 波浪 自由场海水 动水压力 

分 类 号：TU311.3[建筑科学—结构工程]