地铁车辆段上盖结构抗震性能设计探讨分析

Discussion on the Seismic Performance Design of the Overhead Structure of the Metro Depot

针对地铁车辆段上盖结构的特点,提出针对性的抗震性能设计原则和加强措施,并推导确定不同性能水平下构件性能评价标准混凝土受拉损坏系数Dt、混凝土受压损坏系数Dc和钢筋(钢材)塑性应变与屈服应变比值e p/e y,之后进行罕遇地震作用下的动力弹塑性分析,证明了所提出抗震性能设计原则和加强措施合理有效,为后续地铁车辆段上盖结构设计提供参考。

According to the characteristics of overhead structure of metro depot,this paper puts forward corresponding performance-based seismic design principles and strengthen measures,then determine the component performance evaluation criterion of concrete tensile damage coefficient Dt,concrete compression damage coefficient Dc,ratio of plastic strain to yield strain of reinforcement(steel)εp/εy under different performance levels,after that proceed with dynamic elastoplastic analysis under the severe earthquake,prove the reasonable and effective of corresponding performance-based seismic design principles and strengthen measures,which provide the reference for the design of overhead structure of metro depot.