【摘要】 以哈达山水利枢纽坝址区地震为例,采用三维非线性有限元法建立了土坝和坝基的三维非线性有限元模型,并根据提供的地震动加速度曲线采用动力时程分析法对大坝进行地震反应分析。结果表明,设计地震作用下坝体的加速度、位移和应力反应均小,地震永久变形不明显,约为最大坝高(含坝基覆盖层)的0.10%,整体稳定性满足要求,设计方案合理。更多还原

【Abstract】 The basic seismic intensity in dam site of Hadashan water project is eight degree.The scheme of reinforcement with cover-weight and vibroflotation pile is adopted.By the use of 3-D nonlinear finite element method,the FEM model of dam and its foundation is built.According to the seismic acceleration curve provided,the seismic response behavior is researched by dynamic time-history method.The analysis shows that,the acceleration response,the displacement response and the stress response are small under design earthquake action.The earthquake induced permanent deformation is small,and its value is about 0.10% of the maximum dam height(including foundation overburden).The global stability of dam satisfies the requirement.The design proposal is technically feasible.更多还原