【摘要】 为了寻求桩-土-结构非线性动力相互作用的简化分析方法,提出了桩-土-结相互作用(PSSI)体系基于能力谱法的pushover分析方法。该方法将PSSI体系经两次等效为等价SDOF体系,并修正了PSSI体系的等价修正阻尼比和能力谱,然后将pushover分析得到的结构能力曲线与需求曲线相结合,得到结构在大震下的峰值反应。能过对一4层3跨的桩-土-结相互作用体系进行实例分析,验证了该方法的可行性,对带桩筏基的剪切型钢筋混凝土结构在大震作用下的非线性反应,能够进行较好的估计。更多还原

【Abstract】 In order to seek a simplified nonlinear dynamic response analysis method about the pile-soil-structure interaction system,the pushover analytical method of pile-soil-structure interaction(PSSI)system is put forward based on the capacity spectrum in this paper.Firstly,through twice equivalence,the PSSI system is transformed into an equivalent SDOF system.Secondly,the modified equivalent damping ratio of PSSI system and capacity spectrum is proposed.Thirdly,the maximum seismic response is obtained for structure under rare earthquake through combination the capacity curve and the demand curve of the structure.In this paper,a 4-storey PSSI system as example is analyzed by proposed method.The result shows proposed method can estimate the seismic response of PSSI system.更多还原