【摘要】 为分析软弱地基上溢流坝的抗震安全性能,以贵州省兴仁县鲁皂水库重力坝为例,基于流固耦合理论,考虑地震作用下库水和大坝之间的相互作用,建立了溢流坝段有限元模型,采用时程法进行地震动力分析,获得了坝体动应力、动位移和加速度的分布规律,并将水工建筑物抗震规范中的振型分解反应谱法与时程法的计算结果进行对比。结果表明,该工程具有良好的抗震安全性能。更多还原

【Abstract】 Taking gravity dam for Luzao reservoir located in Xingren County of Guizhou Province for an example,the seismic dynamic characteristics of the overflow section of the dam built on soft foundation is studied with finite element method.Based on the theory of fluid-solid coupling,the dynamic seismic response is analyzed by considering the interaction between reservoir water and dam in earthquake.The distribution of dynamic stress,dynamic displacement and acceleration of the dam are achieved by time history method and response spectrum method.Compared with modal analysis response spectrum method and time history method in specifications for antiseismic hydraulic construction,the results show that the project has good aseismic safety performance.更多还原