摘要
基于动力有限元理论建立了坝体-地基-库水体系的数值模型,分析了库水和地基联合作用对结构动力响应的影响,探讨了计算过程中涉及的动力响应输入和地震波处理等相关问题,并以某水电站岸坡坝段为例,比较了坝体-地基-库水模型与传统附加质量-无质量地基模型的地震响应结果。结果表明,与传统附加质量-无质量地基模型相比,坝体-地基-库水模型的位移和应力均有较大的降低,可为设计安全储备提供参考。
Based on the theory of dynamic finite element method, numerical model of dam-foundation-reservoir system is presented. The influence of joint action between reservoir and foundation on dynamic response of structure is analyzed. And the techniques such as dynamic response input and seismic wave treatment in calculation process are discussed. Tak- ing bank slope dam section of hydropower station for an example, the result of seismic response obtained with dam-foun- dation-reservoir model is compared with that of additional mass-massless foundation model. The results show that the dynamic displacement and stress obviously decrease, which can provide reference for design of hydro structure safety.
出处
《水电能源科学》
北大核心
2012年第1期40-44,共5页
Water Resources and Power
基金
长江科学院博士启动基金资助项目(CKSQ2010082)
关键词
坝体-地基-库水体系
动力有限元分析
流固耦合
无限地基
地震动输入
dam-boundary-reservoir system
dynamic finite element analysis
fluid-solid coupling
infinite foundation
seismic input
