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在合理模拟临跨的静态荷载以及质量影响的基础上,采用三维有限元对南水北调工程氵名河大型渡槽典型槽段单跨渡槽进行结构地震动力分析.对于影响渡槽结构动力响应的盆式支座、槽内水体与结构的流固耦合作用以及桩基-土体的动力相互作用,参照相关规范的原则和相关研究成果,在尽可能反映其实际影响和合理简化的基础上进行模拟,研究了结构自振特性、结构各部位的动力位移、应力以及内力响应.计算结果表明:采用不同水体模拟方法和不同计算分析方法得到的动力响应规律是一致的,动力响应值比较接近.
Based on the reasonable simulation of the transient static load and the influence of mass on the foundation, the three-dimensional finite element method is used to analyze the structural dynamic of the single span aqueduct of the Mingjiang River large-scale aqueduct in the South-to-North Water Diversion Project.For the dynamic response of aqueduct, , The fluid-structure interaction between water body and structure in the tank and the dynamic interaction between pile foundation and soil body, according to the principle of relevant norms and related research results, the actual impact and reasonable simplification are reflected as much as possible, The natural vibration of the structure, the dynamic displacement, the stress and the internal force response of each part of the structure are calculated.The results show that the dynamic response obtained by different water modeling methods and different calculation and analysis methods are consistent and the dynamic response values are relatively close.