【摘要】 针对近断层地震动特征,以生命线系统重要组成部分的变电站建筑物为例,结合我国变电站量大面广的特点,首次建立了考虑变电站主体结构-电气设备复合体系相互作用的三维动力分析模型,选取多条实际近断层地震动记录作为地震动输入,采用非线性动力时程分析方法对结构-设备复合体系进行地震反应分析,并与远断层地震动作用下的地震反应结果进行了对比分析。结果表明,变电站结构-设备复合体系在近断层地震动作用下的地震反应大于远断层地震动作用下的结果,该类建筑物对近断层地震动的作用较为敏感,近断层处变电站的地震破坏影响程度更大。此外,对采用隔震技术的变电站建筑在近断层地震动作用下的地震反应也进行了探讨,变电站隔震系统在近断层地震动作用下的反应小于远断层地震动作用下的结果,隔震效果稍差,在近断层地区应慎用隔震技术。更多还原

【Abstract】 The switch building in substation,one of the important parts of the lifeline system,is studied in this paper.Considering the interaction of main structure and electrical equipments,a 3D dynamic analysis model of substation involving the interaction of structure-equipments is established and the nonlinear time-history dynamic method is used to analyze the performance of the structure-equipment composite system.The results show that the responses of substation buildings under near-fault ground motions are stronger than those under common ground motions,indicating that this kind of structure-equipment system is more seriously damaged by near-fault ground motions than by far-field ground motions.Meanwhile,the effect of isolation technology is investigated.It is concluded that the isolation technology is not recommended in near-fault ground motions regions.更多还原