基于材料非线性的某地下结构地震反应分析

Analysis on seismic response of an underground structure based on material nonlinearity

以日本早期建造的某隧道为研究对象,基于材料非线性,建立土-结构二维平面应变有限元分析模型,运用有限元软件UC-WCOMD,对其进行非线性动力反应分析。通过分析结构的应力-应变损伤图及损伤单元的应变反应,以及结构与土层的相对位移变化,确定结构的损伤程度并进行加固处理。

With a tunnel built early in Japan as the research object,a finite element model of 2D soil-structure plain strain was established based on the material nonlinearity,and nonlinear dynamic response analysis was made using the finite element software UC-WCOMD. By analyzing the stress-strain damage diagram of the structure,the strain response of damaged unit and the change of relative displacement between structure and soil layer,the damage degree of the structure was determined,and the reinforcement treatment was conducted.