Seismic performance evaluation of underground reinforced concrete

基础与钢筋混凝土的边界特性：进行了砂土与混凝土界面的平面剪切试验，成功开发了考虑摩擦和黏结的边界界面单元。对地下结构的动力响应进行了边界特性敏感性分析。3D-RC本构规律：采用路径相关本构模型对多向裂缝进行数值处理，并将其实现为层状三维Mindlin板有限元和实体RC方案。三维循环作用下的箱型壳：对三维空间箱型框架施加偏心力，产生面内、面外耦合作用。利用该实验数据，对所编制的非线性有限元程序进行了验证。抗震性能评价：以穿越软基的地下城市道路隧道、钢筋混凝土套管基础和钢筋混凝土框架地铁车站为研究对象，进行了非线性动力分析。这些结果为JSCE提出抗震性能评价校核建议提供了依据。

Boundary characteristics of foundation and reinforced concrete : Plane shear test for interface between sandy soil and concrete was conducted and a boundary interface element to take into account friction and cohesive bond was successfully developed. Asensitivity analysis was carried out for boundary properties to dynamic response of underground structures.3D-RC constitutive law : Multi-directional cracks were numerically handled by the path-dependent constitutive model and implemented into layr 3D Mindlin plate finite element and solid RC scheme.Box-type shell under 3D cyclic actions : Eccentric force which creates coupled in-plane and out-of-plane actions was applied to the 3D space box frames. With this experimental data, the nonlinear FEM program developed was examined and verified.Seismic performance evaluation : Uunderground urban road tunnel passing through soft foundation, RC casing foundation and RC framed subway station were targeted, and developed nonlinear dynamic analysis was applied. These results served to draft the JSCE proposal on seismic performance evaluation check.