重力坝复杂坝段有限元应力分析方法的探讨

有限元应力分析方法在坝工设计中已得到广泛应用.但对于某些复杂的情况,有限元法的实用、规程化还有不少问题有待进一步解决.本文结合若干工程计算实例,介绍应用有限元法计算重力坝复杂坝段(诸如底孔坝段,厂房坝段)的一些体会,讨论了含横缝灌浆压力、地震力等复杂荷载作用下复杂结构的三维有限元应力分析方法的某些实用问题,并对其中的前处理、后处理,特别是对改进三维有限元成果整理及程序使用等问题提出了一些看法.

Discussion of Finite Element Stress Analysis for Complex Segment of Gravity Dams

The finite element stress analysis has been widely adopted in the design of dams. However in practical application there are still many problems which remain to be solved. In this paper the finite element method used to compute complex segments of gravity dams, such as the segment with an outlet at bottom of a dam and the power house segment, is introduced with some engineering examples. The three dimensional finite element stress analysis method for solving complex structures with some complex loads, such as grouting pressures and seismic forces, is discussed. Some suggestions about the pre-processing, after-processing and sorting out of stress and the program application are proposea.