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将基于性能的抗震设计方法(PBSD)用于变电站的结构设计中。由于变电站破坏引起的损失难以估计,投资-效益准则的应用较困难。根据汶川大地震中变电站震害情况分析,指出钢构架一般能满足抗震要求,而对变电站混凝土结构采用基于性能的抗震设计方法比较有针对性。“小震不坏,中震可修,大震不倒”是我国规范对结构的目标性能要求,而某些重要的变电站结构可在规范的基础上根据实际情况提高一个层次而达到“大震可修”的要求。采用基于迭代变形计算的方法设计了两种不同目标性能要求的变电站结构,设计结果表明:合理提高变电站的目标性能后,其初始造价增加不多。
The performance-based seismic design method (PBSD) is used in the structural design of substations. As the damage caused by the destruction of substations is difficult to estimate, the application of investment-benefit criteria is more difficult. According to the analysis of substation seismic damage in Wenchuan earthquake, it is pointed out that the steel frame can meet the seismic requirements generally, while the performance-based seismic design method is more pertinent to the concrete structure of substation. “Small earthquake is not bad, can be repaired in the earthquake, the earthquake does not fall ” is China’s standard performance requirements for the structure of the target, and some important substation structure can be based on the norms in accordance with the actual situation to raise a level to achieve “Great earthquake repair ” requirements. Based on the method of iterative deformation calculation, two substations with different target performance requirements are designed. The design results show that the initial cost of the substation increases little after the target performance of the substation is reasonably increased.