| 一种深厚覆盖层场地地震动参数的确定方法 |
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| 引用本文： | 李红军,杨正权,李德玉,王海波,朱凯斌.一种深厚覆盖层场地地震动参数的确定方法[J].西北地震学报,2019,41(1):60-68. |
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| 作者姓名： | 李红军 杨正权 李德玉 王海波 朱凯斌 |
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| 作者单位： | 中国水利水电科学研究院, 北京 100048,中国水利水电科学研究院, 北京 100048,中国水利水电科学研究院, 北京 100048,中国水利水电科学研究院, 北京 100048,中国水利水电科学研究院, 北京 100048 |
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| 基金项目： | 国家自然科学基金（51579033，51509272，51679264）；国家重点研发计划（2017YFC0404904） |
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| 摘 要： | 基于欧美规范确定了坐落在深厚覆盖层上KH抽水蓄能电站上、下库场地基本运行和最大设计地震动峰值加速度、反应谱和时程等动参数。首先依据场地区域地震烈度区划图、特征周期区划图和依据场地地质地震条件选取的5条种子实测地震动确定场地基岩输入加速度时程、峰值加速度和设计反应谱,进而基于各土层地质参数和一维弹性波传播模拟程序确定覆盖层表面的平均峰值加速度、平均反应谱和5条地震动时程,对所得到的平均反应谱和峰值加速度进行光滑处理后确定可用于各建筑物结构抗震设计的地震动参数,包括覆盖层表面水平向动力响应加速度时程、峰值加速度和设计反应谱。该方法可较好地保留输入地震动的真实动力特性,如持时、相位和频率等,为我国规范中建议的确定场地地震动参数的方法提供有益的补充。
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| 关 键 词： | 深厚覆盖层 场地响应 地震动时程 设计反应谱 峰值加速度 |
| 收稿时间： | 2018/9/14 0:00:00 |
Determination of Site Ground Motion Parameters onDeep Overburden |
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| LI Hongjun,YANG Zhengquan,LI Deyu,WANG Haibo and ZHU Kaibin.Determination of Site Ground Motion Parameters onDeep Overburden[J].Northwestern Seismological Journal,2019,41(1):60-68. |
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| Authors: | LI Hongjun YANG Zhengquan LI Deyu WANG Haibo and ZHU Kaibin |
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| Institution: | China Institute of Water Resources and Hydropower Research, Beijing 100048, China,China Institute of Water Resources and Hydropower Research, Beijing 100048, China,China Institute of Water Resources and Hydropower Research, Beijing 100048, China,China Institute of Water Resources and Hydropower Research, Beijing 100048, China and China Institute of Water Resources and Hydropower Research, Beijing 100048, China |
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| Abstract: | A procedure for determining the ground motion parameters of a dam site located on a deep overburden layer that meet the relevant codes in Europe and America is presented. The KH pumped storage power station in Israel is taken as an example. First, the peak ground acceleration and design response spectrum at the bedrock are determined on the basis of SI 413-2013 and the seismic zoning map in Israel. Then, five seeded recorded ground motions are selected on the basis of the geological conditions of the dam site. The input acceleration time histories, peak accelerations, and response spectra of the bedrock for the upper reservoir and reservoirs can be determined on the basis of the five ground motions. Second, site response analysis is performed by using the 1-D elastic wave propagation program SHAKE. Then, the average peak acceleration, average response spectrum, and time histories of response acceleration at the surface of the overburden layer are obtained. Finally, the average response spectrum and peak acceleration in the horizontal direction at the foundation surface are obtained by smoothing the obtained average response spectrum and peak acceleration in accordance with ASCE 7-05. The presented method can retain the real dynamic characteristics, including duration, phase, and frequency, of input ground motion. Thus, this method can be used as an effective and efficient alternative to seismic analysis in geotechnical practices in China. |
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| Keywords: | deep overburden layer site response time history of ground motion design response spectrum peak acceleration |
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