Analysis Of Concrete Arch Dams By Nonlinear Finite Element And Study Of Crack Calculated

In this paper, the analysis means of arch dam are summarized and contrasted, the nonlinear FEM analysis of arch dam system based on ANSYS and interface program between ANSYS and FORTRAN are developed, parameterized modeling of arch dam system in ANSYS is developed and combining project example, PingXiang arch dam is analyzed by 3-D FEM simulation analysis means.At first, the secondary developing technique of ANSYS is studied, parameterized modeling of arch dam system is developed . which realize the rapid simulation analysis of arch dam by ANSYS. The arch dam can be modeled and researched conveniently and efficiently by it.Basic theory of nonlinear FEM analysis and its realization in ANSYS were studied afterward, nonlinear structural behaviors, the basic equations of elastic and plastic problem and strength criterion commonly used were discussed. And the basic process of FEM simulation analysis in ANSYS was introduced in detail.The interface program with ANSYS are developed, the transfer allocate of FORTRAN program in ANSYS are realized.Then, The cracking mechanism of arch dam is studied, the two fracturemodels in common use in FEM analysis are analyzed and the fracture modeling technique of cracking analysis in ANSYS and the cracking theory of concrete are researched. As an project example, the cracking mechanism of PingXiang arch dam is researched and its cause of cracking is analyzed.At last, PingXiang arch dam is modeled visually and 3-D nonlinear FEM simulation analyzed, the simulation modeling of actually loading in process of arch dam construction is actualized and the stress and displacement rule of dam in different fact is calculated and analyzed, the design scheme is judged in general.