波浪作用下结构-海床耦合系统失稳破坏机理的数值探究  

Numerical study on mechanism of instability and failure of structure-waveseabed coupling system under wave action

作　　者：李桦 张鑫[2] 

机构地区：[1]中交天津港湾工程设计院有限公司,天津300461 [2]中交水运规划设计院有限公司,北京100007

出　　处：《水道港口》2014年第6期589-594,共6页Journal of Waterway and Harbor

摘　　要：为探究波浪作用下结构-海床耦合系统的失稳破坏机理,建立能模拟此破坏情况的计算模型,文章在设置接触面情况下,将循环荷载作用下饱和粘土不排水抗剪强度模型及动孔压模型引入等效线性化计算模型,并对该耦合系统进行动力分析计算,计算结果更准确地反映了土体的塑性变形积累和强度衰退随循环荷载周期的变化,并且与模型实验的观测结果更接近。A computational model of the structure-wave-seabed coupling system was established to study the mechanism of instability and failure under wave action. According to the interface between soil and structure, the undrained shear strength after cyclic loading model and pore pressure model for saturated clay were introduced into equivalent linear model, and dynamic analysis were conducted. The numerical results are approximate to experiment observed data because of the advantaged model.

关 键 词：结构-海床耦合系统 动荷载 粘土 动孔压模型 接触面 

分 类 号：TV143[水利工程—水力学及河流动力学] O242.1[理学—计算数学]