| 液化土层对地表位移谱的影响 |
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| 引用本文： | 孙锐,袁晓铭,陈龙伟,曹振中.液化土层对地表位移谱的影响[J].世界地震工程,2009,25(3). |
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| 作者姓名： | 孙锐 袁晓铭 陈龙伟 曹振中 |
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| 作者单位： | 中国地震局,工程力学研究所,黑龙江,哈尔滨,150080 |
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| 基金项目： | 国家科技支撑计划项目，国家自然科学基金重大研究计划项目，国家自然科学基金项目，国家"973"项目 |
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| 摘 要： | 通过现场地震记录分析和理论计算,研究了液化土层对地表位移谱的影响规律,提出了液化位移增量谱和液化修正位移谱.对比了美国Superstition Hills地震和日本阪神地震中液化场地加速度时程和位移时程,分析了液化和非液化场地位移谱区别.采用改进的一维有效应力分析方法,计算了在不同强度和波型地震波输入下厚度和埋深不同的液化砂层对地表位移谱的影响.结果表明:液化对地表位移和位移谱有显著放大作用,位移谱在1s左右开始增大,加震最显著频段为1～5s,谱位移增加0.1～0.7m,烈度8度时平均加震增幅0.1～0.25m,9度时平均增幅0.4～0.7m.
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| 关 键 词： | 液化 地表位移 位移谱 增量谱 修正谱 |
Effect of liquefied soil layers on surface displacement spectra |
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| SUN Rui,YUAN Xiaoming,CHEN Longwei,CAO Zhenzhong.Effect of liquefied soil layers on surface displacement spectra[J].World Information On Earthquake Engineering,2009,25(3). |
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| Authors: | SUN Rui YUAN Xiaoming CHEN Longwei CAO Zhenzhong |
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| Institution: | SUN Rui,YUAN Xiaoming,CHEN Longwei,CAO Zhenzhong(Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China) |
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| Abstract: | The effects of liquefied soil layers on surface displacement spectra are investigated,and the incremental displacement spectra and revised displacement spectra due to liquefaction are presented in terms of earthquake records and theoretical analysis.The surface acceleration and displacement histories in the liquefied sites of the Superstition Hills of USA and the Kobe Earthquake of Japan are compared and the difference of the displacement spectra for the liquefied and the non-liquefied sites are identified.... |
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| Keywords: | liquefaction surface displacement displacement spectra incremental displacement spectra revised displacement spectra |
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