引用本文: 刘彤, 袁勇. 地铁车站增量动力分析的极限状态判定方法1)[J]. 力学与实践, 2018, 40(2): 148-154.
LIU Tong, YUAN Yong. LIMIT STATE DETERMINATION FOR A SUBWAY STATION STRUCTURE BY INCREMENTAL DYNAMIC ANALYSIS1)[J]. MECHANICS IN ENGINEERING, 2018, 40(2): 148-154.
 Citation: LIU Tong, YUAN Yong. LIMIT STATE DETERMINATION FOR A SUBWAY STATION STRUCTURE BY INCREMENTAL DYNAMIC ANALYSIS1)[J]. MECHANICS IN ENGINEERING, 2018, 40(2): 148-154.

## LIMIT STATE DETERMINATION FOR A SUBWAY STATION STRUCTURE BY INCREMENTAL DYNAMIC ANALYSIS1)

• 摘要: -5 表征地下结构抗震性能的研究不多,而性能化设计方法需要确定结构物在地震作用下的极限状态. 本文根据地铁车站特点,从结构变形性能和止水性能两个方面定义了抗震性能的四个极限状态,并以结构最大层间位移角 作为特征指标. 以上海某多层地铁车站为背景,建立了土--结构二维有限元模型,采用增量动力分析法 研究该类结构的抗震极限状态,建立了增量动力分析法的地震动强度指标结构底部峰值加速度与结构性能指标最大层间位移角 的关系曲线,给出了该地铁车站结构4个极限状态的最大层间位移角界限值.

Abstract: The seismic performance of the underground structures, is not well studied, while on the other hand, the seismic limit state determination is important for a performance-based design. In this paper, four limit states are defined in terms of the deformation and the waterproof performance of the structure while the maximum story drift angle (θmax) is selected as the characteristic indicator according to the feature of the subway station. Based on a multi-story subway station in Shanghai, a two-dimensional finite element model of the soil and the structure is established and the seismic limit state of the subway station is investigated using the incremental dynamic analysis (IDA). Finally, the relation curve between the seismic intensity measure PBA (peak acceleration at the base of subway station) and structural performance indictor θmax is established and the thresholds of θmax for this subway station are obtained in the four limit states.

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