地铁区间隧道列车振动响应测试与数值分析

Tests and Analyses of the Dynamic Response of Tunnels Subjected to Passing Train Load

本文在现场试验的基础上,导出了列车振动荷载的数定表达式,采用弹塑性本构关系和摩尔—库仑屈服准则,应用有限元模型,有限元与无限元耦合模型在时域内对北京地铁进行了振动分析。分析表明,有限元与无限元耦合模型是解决弹塑性半空间问题的一种有效方法。

On the basis of the tests carried out at Beijing Subway,formulas for locomotive and vehicle loads are derived. Finite elements,coupled finite and infinite elements are adopted for analysing the dynamic response, incorporating nonlinear stress-strain relationship of material and Mohr-Coulomb criteria in the domain. Results from the analyses indicate that the coupled finite and infinite element method is effective for analyzing and solving the problems of elastroplastisity in half-spaces.