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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 dynamic finite element theory, the numerical model of the dam-foundation-reservoir-water system is established, and the influence of the joint action of reservoir water and foundation on the dynamic response of the structure is analyzed. Relevant problems such as dynamic response input and seismic wave processing involved in the calculation process are discussed The seismic responses of the dam-foundation-reservoir-water model and the traditional additional mass-massless foundation model are compared with the example of bank slope section of a hydropower station. The results show that the displacement and stress of the dam-foundation-reservoir-water model are greatly reduced compared with the traditional additional mass-massless foundation model, which can provide a reference for designing the safety reserve.