大连理工大学学报Issue(5)：504-510,7.DOI:10.7511/dllgxb201505009
含倾斜砂土夹层的人工岛地震液化灾害分析
Analyses of seismic liquefaction induced disaster in artificial island with sloping sand layer
摘要
Abstract
Liquefaction due to strong earthquake easily causes permanent displacement and strain of sloping sand layer in the fundament and induces the phenomena of flow slides,and then brings serious damages to the superstructure. Considering sloping sand layers' gradient, thickness, depth and seawater level synthetically, a two-dimensional offshore artificial island model was simulated numerically by FE-FD coupling finite element analysis method.The experimental results indicate that these four influence factors have different effects on the large deformation of artificial island in the course of seismic liquefaction.The influence of gradient is the greatest,and the influence of seawater level is the most non-obvious,and especially,its effect on excess pore water pressure is very small. Lateral spreading of artificial island j ust occurs after total liquefaction of saturated sloping sand layer in the course of seismic,which is a limit slide along the slope during a period of time.Its degree of damage is much bigger than that of damage induced by liquefaction of horizontal sand layer,and it easily causes serious differential settlement and damage of revetment of artificial island. These analytical results can provide reference for hazard evaluation of offshore engineering due to seismic liquefaction.关键词
人工岛/地震/数值模拟/液化/倾斜砂土夹层/侧向滑移/沉降Key words
artificial island/earthquake/numerical simulation/liquefaction/sloping sand layer/lateral spreading/settlement分类
建筑与水利引用本文复制引用
胡记磊,唐小微,白旭,张西文..含倾斜砂土夹层的人工岛地震液化灾害分析[J].大连理工大学学报,2015,(5):504-510,7.基金项目
“九七三”国家重点基础研究发展计划资助项目(2011CB013605-2) （2011CB013605-2）
国家自然科学基金资助项目(51078062) （51078062）
