考虑人工边界的海底管线地震应力分析  

Seismic response analysis of submarine pipeline considering artificial boundary

作　　者：张小玲[1] 栾茂田[1,2,3] 郭莹[1,2] 曲鹏[1] 

机构地区：[1]大连理工大学土木水利学院岩土工程研究所,辽宁大连116024 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [3]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《大连理工大学学报》2009年第4期551-557,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(重点项目50439010;50639010;50579006);教育部科学技术研究重大项目(305003)

摘　　要：海床动力响应分析一般将管线假定为刚性,没有考虑地震荷载作用下海床边界的等效处理,亦不能合理地考虑海床与管线的相互作用效应.基于Biot动力固结理论建立了海床-管线相互作用的计算模型,利用粘弹性人工边界,以大型有限元软件ADINA为平台对El-Centro地震波作用下的海底管线的动力响应进行分析,重点讨论了成层海床土对海床中孔隙水压力和海底管线内应力的影响.结果表明:海床土性的变化对海底管线的内应力影响不大,而对海底管线周围孔隙水压力的影响很重要.In most of the previous investigations for dynamic response of seabed, the pipeline is supposed as to be rigid and generally the interaction between seabed and pipeline is overlooked. The equivalent disposal of seabed boundary also has not been taken into consideration. Based on the Biot＇s theory of consolidation, the model of the seabed-pipeline interaction is established using viscous-elastic artificial boundary. The distribution of the pore pressure in seabed soil and the dynamic response of submarine pip analysis packa e g line are studied under El-Centro seismic wave e ADINA. The effects of two-layered seabed by virtue of the general-purpose FEM properties on the seismic-induced pore pressure and internal stresses are discussed emphatically. It is shown that the influences of seabed soil properties on internal stresses of pipeline are slight, but those on pore pressure around pipeline are remarkable.

关 键 词：海底管线 孔隙水压力 地震荷载 粘弹性人工边界 

分 类 号：TU432[建筑科学—岩土工程]