利用ABAQUS分析混凝土面板堆石坝非线性应力与应变

Nonlinear analysis of stress and strain for CFRD by ABAQUS

利用通用有限元分析系统ABAQUS的用户子程序,实现了Duncan-Chang模型的开发.对某混凝土面板堆石坝(CFRD)进行了填筑与蓄水过程的应力与变形的三维非线性有限元仿真模拟,得到了坝体和面板的应力与变形、垂直缝和周边缝沉陷、剪切和张开变形等结果,可为坝体断面优化分区、接缝止水设计提供重要参考依据.同时表明:充分利用ABAQUS已经具备的非线性分析功能,二次开发是完成混凝土面板堆石坝三维非线性应力应变分析的有效解决方案.

The Duncan-Chang constitutive model was implemented by using User Subroutine in ABAQUS which is a general-purpose finite element analysis system. Stresses and movements analysis for a concrete face rockfill dam （CFRD） including the phases of deposition and water storage were simulated by 3-D nonlinear FEM. The stresses and movements of the dam, the magnitude of opening, sliding and sinking about the vertical and circumjacent aperture on the slab were obtained. All results are reasonable and capable of providing important reference for the optimization of cross-section zones and the sealing system design for the project. Moreover, fully utilizing the nonlinear analysis capacities provided by ABAQUS, redevelopment is a shortcut and an effective solution to accomplishing stress and strain analysis for CFRD.