摘要
结构在近场地震动作用下的反应和远场地震动作用下的明显不同,这主要是由近场地震动高能量的速度脉冲等特征决定的。通过对110条近场地震动记录的分析,得到了相应的弹性反应谱,并通过对近场地震动和远场地震动作用下结构塑性分析进行对比,得到了以下结论:近场地震动作用下结构的弹性反应谱与规范谱明显不同,尤其在长周期阶段,表明规范谱值偏小;近场地震动作用对结构提出了更高的强度和变形需求。
Near-field earthquakes result in quite different structural responses from far-field earthquakes, which is mainly due to the characteristic of high-power velocity pulses for near-field earthquakes. In this paper, elastic and inelastic response spectra are obtained based on the analysis of 110 near-field ground motion records. Comparison of response spectra for near-field and far-field earthquakes is conducted and the results show that the near-field earthquake has a distinct response spectrum compared to the design spectrum, especially in the long-period range. The near-field earthquake shows much higher demand of strength and deformation.
出处
《华南地震》
2008年第2期1-9,共9页
South China Journal of Seismology
基金
国家自然科学基金重点项目(40534021)
国家西部交通建设重点项目(200431881211)
关键词
弹性
塑性
近场地震动
特性
反应谱
Near-field earthquake, Characteristic, Elastic, Inelastic, Response spectrum
