基于Matasovic骨架曲线的有效应力方法在ABAQUS软件中的实现  

The Implementation of Dynamic Effective Stress Method Based on Matasovic Constitutive Model in ABAQUS Software

作　　者：王龙[1] 常素萍 陈国兴[1,3] 

机构地区：[1]南京工业大学岩土工程研究所,江苏南京210009 [2]盐城市建筑设计研究院有限公司,江苏盐城224002 [3]江苏省土木工程防震技术研究中心,江苏南京210009

出　　处：《防灾减灾工程学报》2016年第2期231-238,共8页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51378258;51438004)资助

摘　　要：将描述土体液化特性的Byrne简化的Martin-Finn振动孔压增量模型与修正Matasovic黏弹性本构模型相结合,以外挂子程序的形式,嵌入到ABAQUS软件中,实现了可液化地基孔压增长过程的数值模拟。以简单应力状态下的可液化地基为例,初步验证了该子程序的动力有效应力分析能力;对某液化场地进行了二维非线性的总应力法和有效应力法对比分析,给出了地表加速度和地表加速度反应谱的对比结果,同时给出了代表性单元的剪应变时程曲线。结果表明,该子程序能够较好地模拟液化场地的振动孔压发展过程,预测场地的地震液化趋势。Martin-Finn dynamic pore water pressure incremental model simplified by Byrne is used to describe the liquefaction characteristics of the soil,combined with the pore water pressure incremental model and the Matasovic viscoelasticity constitutive model,then we develop the subprogram in ABAQUS software and simulate the growth of vibration pore pressure of the liquefiable site by numerical computation.The sub-program is preliminarily verified the ability of dynamic effective stress analysis through a simple liquefiable site,and the total stress method and the effective stress method are used respectively in a typical liquefiable site analysis,and the comparison of the ground acceleration and acceleration response spectrum and the shear strain time history curve of representative element is given.The above results preliminarily demonstrate the ability of the sub-program to simulate the liquefiable characteristics of the liquefiable site.This indicates that the sub-program developed by the authors can better simulate the development of the vibration pore pressure of the liquefied site,and it can be used to predict the trend of earthquake liquefaction of the site.

关 键 词：Byrne孔压增量模型 修正Matasovic本构模型 有效应力法 非线性地震反应 

分 类 号：TU352.1[建筑科学—结构工程]