峡江水利枢纽泄水闸底板裂缝成因有限元分析

Analysis of causes of cracks in sluice bottom of Xiajiang Hydro-junction based on finite element method

结合施工期大坝安全监测所得应力、温度等实测数据,运用非线性有限元法对泄水闸底板进行施工期仿真计算.通过对仿真计算结果与裂缝实际分布的对比分析,得出裂缝形成的主要成因是基础约束、温度应力,并提出了防治裂缝的针对性措施.

In order to analyze the different causes of various cracks in Xiajiang Hydro-junction, the sluice bottom is simulated with the nonlinear finite element method （FEM）, combining the stress and tempera- ture experimental data obtained from the dam safety monitoring process. Through the comparison and anal- ysis of actual conditions and the results with the actual distribution of cracks,it is concluded that the pri- mary factors causing different kinds of cracks are infrastructure constraints and temperature stress. The pa- per proposed some specific measures of prevention and treatment of cracks.