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特高压电气设备抗震设计反应谱特征周期取值研究
尤红兵1) 赵凤新1) 尤贺2)
1)中国地震灾害防御中心,北京 100029/2)北京工业大学,北京 100124
摘要:
特征周期是抗震设计反应谱的重要参数,开展特高压电气设备抗震设计反应谱特征周期的研究,具有重要的理论意义和工程应用价值。对美国、日本等世界范围内的1448 条Ⅲ类场地水平向强震记录进行了统计分析,结果表明震级、震中距对特征周期有较大影响;强震记录特征周期的80%分位数结果约为0.9s。对全国近年来已通过评审的312 个Ⅲ类场地的地震安全性评价结果进行了统计分析,70%分位数的特征周期为0.9s。结合相关规范的对比分析,建议特高压电气设备抗震设计反应谱的特征周期取0.9s,可有效保证特高压电气设备的地震安全。
关键词:  特高压电气设备  抗震设计反应谱  特征周期  统计分析
DOI:
分类号:
基金项目:
Characteristic Period Value of the Seismic Design Response Spectrum of UHV Electrical Equipment
You Hongbing,Zhao Fengxin,You He
Abstract:
Characteristic period is an important parameter of the seismic design response spectrum. There is important theoretical significance and engineering application value to the study of the characteristic period of seismic design response spectrum of ultra high voltage ( UHV) electrical equipment. In this paper,1448 horizontal earthquake records within the world scope including the United States and Japan for Site Class Ⅲwere analyzed. Results show that both magnitude and epicentral distance have great influence on the characteristic period. About 80% of characteristic periods of strong earthquake records are about 0. 9s. Statistical analysis was conducted on the seismic hazard assessment results of 312 projects of China in recent years,and it is found that about 70% of characteristic periods are about 0. 9s. Combined with the related code comparison and analysis,it is suggested that the characteristic period of the seismic design response spectrum of UHV electrical equipment should select 0. 9s in order to effectively guarantee the seismic safety of UHV electrical equipment.
Key words:  UHV electrical equipment  Seismic design response spectrum  Characteristic period  Statistical analysis