【作者】 陈柯好； 庞锐； 徐斌；

【Author】 Chen Kehao;Pang Rui;Xu Bin;School of Hydraulic Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology;

【机构】 大连理工大学建设工程学部水利工程学院；

【摘要】 地铁作为城市交通命脉,在地震中频繁受到严重破坏,造成严重的生命财产损失。为了有效分析地铁车站的地震响应和动力可靠度,首先,本文采用随机函数-谱表示法和改进的功率谱密度模型,给出了《城市轨道交通结构抗震设计规范》中五类场地的模型参数,经过迭代生成了一系列与规范谱相吻合的随机地震动。然后,联合等价极值分布和概率密度演化法,基于层间转角、顶板底板间的相对竖向位移、损伤面积比三个评价指标重点分析了侧墙、顶板和中柱的随机动力响应和概率密度信息,依据累积分布函数划分了地铁车站的极限状态。结果表明:地铁车站的破坏存在累积效应,中柱的可靠度明显低于侧墙,与实际震害相符,本文提出的概率分析方法能发现结构中的薄弱处,并对结构的抗震性能进行合理的划分,为结构设计提供合理的参考。更多还原

【Abstract】 As the lifeblood of urban traffic,subway frequently suffers serious damage in earthquake,causing serious loss of life and property.In order to effectively analyze the seismic response and dynamic reliability of the subway station,firstly,this paper uses the random function-spectral representation and improved power spectral density model,determines the structure of urban rail transit code for seismic design of site five types of model parameters,through iteration generates a series of random earthquake ground motion in conformity with the standard spectrum.Then,combined with the equivalent extremum distribution and probability density evolution method,the random dynamic response and probability density information of the side wall,roof and middle pillar were analyzed based on the three evaluation indexes of inter-floor rotation Angle,the relative vertical displacement between roof and floor,and the damage area ratio.The limit states of subway stations were divided according to the cumulative distribution function.The results show that the damage of the subway station has a cumulative effect,and the reliability of the central column is obviously lower than that of the side wall,which is consistent with the actual earthquake damage.The probabilistic analysis method proposed in this paper can find the weakness of the structure and reasonably classify the seismic performance of the structure,which provides a reasonable reference for the structural design.更多还原