摘要
地震可使海底砂质、粉质土层液化并导致上部土层的滑移。基于有效应力有限元动力分析方法和Newmark刚性滑块理论,提出了一种计算海底小坡度(≤5o)土层地震液化引起侧向滑移的简化方法。该方法将波浪荷载简化为海底恒定的上覆压力和初始孔压,忽略了海水粘性对海底土层地震反应的影响,利用改进的Seed孔压模型进行动力分析和液化判别,用Newmark滑块理论计算了土层侧向滑移。通过算例和对比分析,研究了海水深度和土层坡度对侧向滑移的影响,表明该方法的有效性,可为近海工程场地地震地质灾害评价提供参考数据。
Landslide was caused by liquefaction in submarine sandy or silty slope due to earthquake. Based on effective stress finite element method and Newmark’s sliding block theory, simplified approach was developed for evaluating lateral slide displacements induced by liquefaction due to earthquake on submerged gentle slope (≤5o). Wave loads were simplified as constant pressure and initial excess pore pressure. Viscosity of seawater was ignored during dynamic analysis. Liquefaction analysis was conducted using imp...
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第S1期141-145,共5页
Rock and Soil Mechanics
关键词
海底倾斜土层
地震
液化
横向侧移
submarine slope
earthquake
liquefaction
lateral displacement
