| 基于汶川地震远场强震动记录的厚覆盖土层对长周期地震动影响分析 |
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| 引用本文： | 徐扬,赵晋泉,李小军,马秀芳,赵向佳.基于汶川地震远场强震动记录的厚覆盖土层对长周期地震动影响分析[J].震灾防御技术,2008,3(4):345-351. |
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| 作者姓名： | 徐扬 赵晋泉 李小军 马秀芳 赵向佳 |
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| 作者单位： | 1. 山西省地震局,太原,030021
2. 中国地震局工程力学研究所,哈尔滨,150080 |
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| 基金项目： | 中央级公益性研究所基本科研业务基金(2006A02;和国家自然科学基金重大研究计划资助项目
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| 摘 要： | 利用2008年5月12日汶川8．0级地震的远场强震动记录，研究太原盆地厚覆盖土层对长周期地震动的影响，并将其结果与地震安全性评价工作中的土层反应分析结果进行比较。结果表明：厚覆盖土层对长周期地震动有很强的放大作用，覆盖层厚度越厚，峰值出现的周期越大，而相对于基岩最大放大可达9倍左右。另外，对于厚覆盖层的场地，观测结果与场地地震安全性评价计算结果在一定的长周期范围内差别相当大，相对于基岩，观测结果的放大系数至少高于场地地震安全性评价计算结果的2倍以上，最大达到近9倍。
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| 关 键 词： | 强震动记录 汶川地震 场地影响 长周期地震动 |
| 收稿时间： | 2008/11/15 0:00:00 |
Study on Effect of Thick Sedimentary Layers on Long-period Ground Motion from Far-field Strong Motion Records of Wenchun Earthquake |
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| Xu Yang,Zhao Jinquan,Li Xiaojun,Ma Xiufang and Zhao Xiangjia.Study on Effect of Thick Sedimentary Layers on Long-period Ground Motion from Far-field Strong Motion Records of Wenchun Earthquake[J].Technology for Earthquake Disaster Prevention,2008,3(4):345-351. |
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| Authors: | Xu Yang Zhao Jinquan Li Xiaojun Ma Xiufang and Zhao Xiangjia |
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| Institution: | Xu Yang1),Zhao Jinquan1),Li Xiaojun2),Ma Xiufang1) , Zhao Xiangjia1) 1) Earthquake Administration of Shaxi Province,Taiyuan 030021,China 2) Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China |
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| Abstract: | Based on the far-field strong motion records from Wenchuan MS8.0 earthquake,effect of thick sedimentary layers on long-period ground motion in Taiyuan basin is studied.The results are compared with those from the previous projects on evaluation of seismic safety for engineering sites.We found that the long-period ground motion is amplified by the thick sedimentary layers in Taiyuan basin greatly in some range of period.The thicker the sedimentary layer is,the longer the dominant period of ground motions app... |
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| Keywords: | Strong motion record Wenchuan earthquake Site effect Long-period ground motion |
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