重力坝廊道周边应力有限元分析

FEM-Based Analysis on Gallery Stress of Gravity Dam

结合清峪水库重力坝工程设计廊道配筋研究课题,采用ANSYS有限元软件,建立考虑地基变形影响的坝体廊道平面有限元分析模型。通过计算分析,获得了廊道周边应力分布特性和基岩弹性模量对坝基灌浆廊道最大拉应力的影响规律。对比有限元与无限域中标准廊道的计算成果,得到了标准廊道计算成果的适用条件及其拉应力、拉应力合力随基岩坝体弹模比的关系曲线。

Combining with the design of Qingyu Gravity Dam and the research on gallery reinforcement, a 2-D finite element model of dam galleries is build based on ANSYS and after considering the deformation of bedrock. The stress distributions around the galleries and the influence of rock elastic modulus on grouting gallery maximum tensile stress are gained. Comparing the FEM results with the calculations of standard gallery in infinite plane, the limits on applying standard gallery method and the correction curves of tensile stress and force with the ratio of bedrock and dam body modulus are also given herein.