反应位移法在复杂地下结构抗震中的应用

Application of Response Displacement Method on Seismic Design of a Complex Underground Structure

针对我国尚缺少完善的地下结构抗震分析方法和专门的有关复杂地下结构抗震设计规范的现状,在总结目前国内外地下结构抗震计算方法的基础上,采用反应位移法对某复杂地下大空间结构进行抗震设计与分析。同时,分析中还建立了该复杂地下结构的三维精细化有限元模型,采用动力时程分析给出结构的基准地震响应,从而评价反应位移法用于复杂地下结构抗震设计的适用性。分析结果表明,对于不同的计算工况反应位移法的计算结果与动力时程分析均基本一致,说明反应位移法可用于复杂地下结构的抗震设计。研究结论可为今后类似地下工程的抗震设计提供指导。

So far,both the seismic analysis method and design code for underground structures are vacant and unavailable in China.Based on generalization of the existing seismic calculation methods for underground structures,Response Displacement Method was adopted to evaluate the seismic response of a complex underground structure.Meanwhile,the benchmark model,3D refined finite element model of the underground structure,was set up using the dynamic time history analysis to verify the applicability of Response Displacement Method.The comparison shows,the results from Response Displacement Method are basically consistent with the dynamic time history analysis in all calculation cases,which completely verify the possible application of the Response Displacement Method to the seismic design of complex underground structures.The research conclusions are guidable to seismic design of future analogous underground projects.