论文部分内容阅读
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。
Considering the characteristics of near-fault ground motions, taking substation buildings that are important components of lifeline system as an example, this paper establishes a three-dimensional dynamic analysis model considering the interaction between substation main structure and electrical equipment composite system for the first time with the characteristics of large substations in our country. A number of actual near-fault ground motion records are selected as input of ground motions. The nonlinear dynamic time history analysis method is used to analyze the seismic response of the structure-equipment complex system. The results are compared with the seismic response results of far-fault ground motions. The results show that the seismic response of substation structure-equipment composite system under near-fault ground motions is greater than that under far-fault ground motions. Such buildings are sensitive to the action of near-fault ground motions and the seismic damage of substations near faults More influential. In addition, the seismic response of the substation building adopting the seismic isolation technique under the effect of near-fault ground motions is also discussed. The response of the isolation system of the substation to near-fault ground motions is less than that of the far-fault earthquakes. The effect is slightly worse, should be used with caution in near-fault isolation technology.