二维土体抗震液化的数值分析  

Numerical Study on Earthquake Resistance and Liquefaction for 2D Soil Body Analysis

作　　者：李君[1] 彭宣茂[1] 娄潇聪 

机构地区：[1]河海大学土木工程学院,江苏南京210098 [2]舟山市水务局,浙江舟山316021

出　　处：《水电能源科学》2008年第2期54-57,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50379004)

摘　　要：根据土体静动力和液化的基本原理,讨论了二维土体抗震及液化分析程序编制过程中的相关问题。基于邓肯—张非线性模型对土体进行有限元静力计算分析,采用Wilson-θ逐步数值积分法求解动力平衡微分方程,并采用抗液化安全度判别土体的液化程度。算例分析表明,采用该程序进行土体抗震及液化分析是合理可行的。The main principle of static-dynamics and liquefaction is analyzed, and the correlation problems in generating process of the earthquake resistance and liquefaction for 2D soil body analysis program are discussed. The finite element static condition of the soil body is analyzed based on Duncan-Chang non-linear model,the dynamic equilibrium differential equation is solved with Wilson-θ step-by-step numerical integration method, and the resistant liquidation degree is used to judge if the soil body is liquidated. Some examples show it is feasible to use this program to analyze the earthquake resistance and liquefaction of 2D soil body.

关 键 词：有限元法 静动力分析 邓肯一张模型 逐步数值积分法 液化判别 

分 类 号：P315[天文地球—地震学]