常用岩土本构模型的选择及对场地动力反应分析结果的影响
发布时间：2018-10-14 11:07
【摘要】：合理选择本构模型是土动力学问题数值模拟中的一项重要工作。利用PLAXIS 2D软件的土工实验模拟功能分别对4种常用的岩土本构模型——线弹性模型、摩尔库伦模型、土体硬化模型和小应变土体硬化模型在往复荷载下的理论滞回曲线进行了对比分析,并在此基础上研究了选择不同本构模型对自由场地震反应分析结果的影响以及不同本构模型中各参数的变化对场地动力计算结果的敏感性分析。研究结果为土动力学问题数值模拟中如何选择本构模型和合理判断数值分析结果提供了参考依据。
[Abstract]:Reasonable selection of constitutive model is an important work in numerical simulation of soil dynamics. By using the geotechnical experiment simulation function of PLAXIS 2D software, four kinds of geotechnical constitutive models, namely linear elastic model, Moore Coulomb model, are studied respectively. The theoretical hysteretic curves of soil hardening model and small strain soil hardening model under reciprocating load are compared and analyzed. On this basis, the influence of choosing different constitutive models on the results of free field seismic response analysis and the sensitivity analysis of the variation of parameters in different constitutive models to the results of site dynamic calculation are studied. The results provide a reference for the selection of constitutive model and the reasonable judgment of numerical analysis results in soil dynamics numerical simulation.
【作者单位】： 石家庄铁道大学土木工程学院;
【基金】：河北省大型基础设施防灾减灾协同创新中心项目 河北省重点学科建设项目(桥梁与隧道工程)
【分类号】：TU435
，
本文编号：2270270
[Abstract]:Reasonable selection of constitutive model is an important work in numerical simulation of soil dynamics. By using the geotechnical experiment simulation function of PLAXIS 2D software, four kinds of geotechnical constitutive models, namely linear elastic model, Moore Coulomb model, are studied respectively. The theoretical hysteretic curves of soil hardening model and small strain soil hardening model under reciprocating load are compared and analyzed. On this basis, the influence of choosing different constitutive models on the results of free field seismic response analysis and the sensitivity analysis of the variation of parameters in different constitutive models to the results of site dynamic calculation are studied. The results provide a reference for the selection of constitutive model and the reasonable judgment of numerical analysis results in soil dynamics numerical simulation.
【作者单位】： 石家庄铁道大学土木工程学院;
【基金】：河北省大型基础设施防灾减灾协同创新中心项目 河北省重点学科建设项目(桥梁与隧道工程)
【分类号】：TU435
，
本文编号：2270270
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