地震和波浪联合作用下海底管线与周围海床的稳定性分析

Submarine pipelines are usually buried in formidable ocean environment, they are subjected to all kind of environmental loadings, in which wave loading and seismic loading are the dominant loadings. Most previous investigations of the dynamic response around an offshore pipeline have limited to one single loading. In this paper, a wave and seismic action together model including buried pipeline is established based on Finite Element Method. Based on the proposed numerical model, the effects of wave and seismic loadings on the dynamic response of seabed and submarine pipeline are investigated. Numerical results indicated that the combination of seismic action and wave action may intensify or counteract the excess pore pressure of seabed around submarine pipeline. In order to avoid the stability problem of seabed and structure caused by amplifying dynamic response under seismic and wave loading action together, it is very necessary to intensify the defense of submarine structures.