铁道科学与工程学报2018，Vol.15Issue(5)：1141-1146,6.
近断层地震反应谱特性分析研究
Study on response spectrum characteristics of near-fault ground motions
摘要
Abstract
In order to guide the seismic design of bridge structures located in near-fault area, the response spectrum characteristics of near-fault seismic waves and its difference from the standard response spectrum in the code for seismic design are made clear through statistical analysis and comparison.126 near-fault seismic waves with typical pulse-like characteristics are selected and classified into three groups according to the fault types. The average seismic response spectrum values of these waves are evaluated and compared with the standard response spectrum in the code for seismic design and the results calculated based on 39 ATC63 far-field seismic waves. The research shows that: The average response spectrum of near-fault seismic waves in the long-period (1.5~9 s) are larger than the suggested values in the current Chinese code and those of ATC63 far-field seismic waves. The maximum can reach to 3.7 times of the former one. It may be unsafety to make seismic design of the structure located in near-fault area based on the current code. Among the three types of pulse-like seismic waves, the response spectrum of normal/reversed fault is the maximum one. The pulse-like seismic waves of normal/reversed fault should be used in seismic analysis of the bridges located in near-fault areas. The effect of near-fault should be considered in seismic analysis, especially for the structures, which have long natural vibration period.关键词
近断层地震/反应谱/减隔震设计/地震放大系数Key words
near-fault ground motion/response spectrum/seismic isolation design/seismic amplification factor分类
交通工程引用本文复制引用
曾永平,陈克坚,庞林,董俊..近断层地震反应谱特性分析研究[J].铁道科学与工程学报,2018,15(5):1141-1146,6.基金项目
中国铁路总公司重大课题资助项目(2015ZB03) （2015ZB03）
四川省科技成果转化(专项)项目(2013GC0144) （专项）
中铁二院科技开发计划项目(13164190(13-15)) （13164190(13-15）
