结构工程师2025，Vol.41Issue(6)：82-90,9.DOI:10.15935/j.cnki.jggcs.202506.0009
110 kV钢结构户内变电站抗震性能研究
Study on Seismic Performance of 110 kV Steel Indoor Substation
蔡勇 1余守赟 1于明 1徐晨耘 2罗金辉 2郭小农2
作者信息
- 1. 浙江华云电力工程设计咨询有限公司,杭州 310011
- 2. 同济大学土木工程学院,上海 200092
- 折叠
摘要
Abstract
Steel-structured fully indoor substations are the preferred solution for urban green substations,offering advantages such as land conservation and stable operation.However,once a fully indoor substation suffers earthquake,it will lead to enormous economic losses.Additionally,traditional seismic design overlooks the structure-equipment interaction,resulting in designs that tend to be unsafe.In this study,the coupling model and the main structure model were established respectively for a 110 kV steel-structured fully indoor substation.The coupled model accounts for the structure-equipment interaction,while the main structure model treats equipment as floor loads.Subsequently,dynamic characteristic analysis(to obtain key parameters such as natural vibration frequencies and mode shapes)and time-history analysis were conducted on the two types of models.Finally,the Incremental Dynamic Analysis(IDA)method was adopted:by adjusting the peak ground acceleration(PGA)of seismic waves,the response indices of the main structure and equipment under different seismic intensities were quantified,so as to comprehensively evaluate the seismic vulnerability of both.The results show that:(1)The acceleration amplification effect of the 2nd-floor GIS(Gas Insulated Switchgear)equipment bushings is significant(with an average value of 4.2 and a maximum value of 5.1),which is much greater than that of the 2nd-floor slab,making the bushings prone to damage due to excessive acceleration during earthquakes;(2)The structure-equipment interaction exerts a notable impact:the maximum difference in amplification factors between the coupled model and the main structure model is 20%,and the maximum difference in inter-story drift angles is 15%;(3)Under the action of some seismic waves,the torsional displacement ratio of the coupled model exceeds 1.2,so torsion reduction measures need to be implemented;(4)Under the same seismic intensity,the failure probability of electrical equipment is far higher than that of the main structure.For instance,when PGA=1.0g,the equipment damage probability reaches 60%,while the main structure barely collapses.关键词
钢结构全户内变电站/抗震性能/电气设备/时程分析/易损性/增量动力分析Key words
steel-structured indoor substation/seismic performance/electrical equipment/time history analysis/fragility/IDA分类
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蔡勇,余守赟,于明,徐晨耘,罗金辉,郭小农..110 kV钢结构户内变电站抗震性能研究[J].结构工程师,2025,41(6):82-90,9.
