修正Matasovic本构模型在ABAQUS软件中的实现

发布时间：2018-09-05 08:44

【摘要】：Hashash等(2001)提出了土体的剪切模量和阻尼特性与土层深度相关的修正Matasovic(1993)黏弹性本构模型,本文基于ABAQUS/standard软件的子程序开发平台,编制了该修正Matasovic本构模型的子程序模块。以美国密西西比湾深厚场地为研究对象,选取Loma Prieta和Northridge地震动加速度记录作为基岩输入地震动,通过ABAQUS软件的二维场地非线性地震反应分析,给出了该深厚场地的地表加速度时程、反应谱,并与国际专业软件DEEPSOIL的一维场地非线性反应分析结果作了对比,发现两者的结果差别不大。这表明:采用基于ABAQUS软件开发的修正Matasovic土体黏弹性本构模型进行场地非线性地震反应分析,是可行的。目前工程上广泛使用的等效线性化方法存在一些不足之处,本文方法可以为工程应用提供参考和比较。
[Abstract]:Hashash et al. (2001) proposed a modified Matasovic (1993) viscoelastic constitutive model, which is related to the depth of soil layer and its shear modulus and damping characteristics. Based on the subprogram development platform of ABAQUS/standard software, the subroutine module of the modified Matasovic constitutive model is developed in this paper. Taking the deep site in Mississippi Bay, USA as the research object, the ground motion acceleration records of Loma Prieta and Northridge are selected as the input ground motion of bedrock, and the nonlinear seismic response of the ground is analyzed by ABAQUS software. The ground acceleration time history and response spectrum of this deep site are given and compared with the results of nonlinear response analysis of one-dimensional site developed by international professional software DEEPSOIL. It is found that the difference between the two results is not significant. This shows that it is feasible to use the modified Matasovic viscoelastic constitutive model based on ABAQUS software to analyze the site nonlinear seismic response. At present, the equivalent linearization method widely used in engineering has some shortcomings. The method in this paper can provide reference and comparison for engineering application.
【作者单位】：南京工业大学岩土工程研究所;盐城市建筑设计院有限公司;江苏省土木工程防震技术研究中心;
【基金】：国家自然科学基金项目(51378258,51438004)~~
【分类号】：TU435

【参考文献】