| 高山峡谷场地地震动水平峰值加速度传播特性研究 |
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| 引用本文： | 张玉敏,李幻,朱泽奇. 高山峡谷场地地震动水平峰值加速度传播特性研究[J]. 世界地震工程, 2011, 27(3) |
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| 作者姓名： | 张玉敏 李幻 朱泽奇 |
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| 作者单位： | 1. 华北水利水电学院资源与环境学院,河南郑州,450011
2. 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,湖北武汉430071 |
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| 基金项目： | 国家自然科学基金重大研究计划项目(90715042); 华北水利水电学院高层次人才科研启动项目 |
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| 摘 要： | 建立了高山峡谷场地的动力计算模型,分析了攀枝花地震动作用下场地水平峰值加速度(HPA)的衰减效应,研究了不同参数对场地HPA传播特性的影响。数值分析结果表明:HPA随深度增加而衰减,HPA在坡脚处比在峡谷处要低一些;在山顶处有放大效应,但放大系数比实际震害要小一些;HPA衰减程度随着阻尼比和模型深度的增加而增加,随着坡比增加而减小,且不受输入地震动峰值加速度影响;在不同频谱特性地震动作用下,当地震波的卓越频率接近计算模型的自振频率时,场地衰减程度会随之增大。
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| 关 键 词： | 高山峡谷场地 地震动 深度衰减 地形效应 传播特性 |
Study on propagation characteristics of horizontal peak acceleration in gorge site |
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| ZHANG Yumin,LI Huan,ZHU Zeqi. Study on propagation characteristics of horizontal peak acceleration in gorge site[J]. World Information On Earthquake Engineering, 2011, 27(3) |
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| Authors: | ZHANG Yumin LI Huan ZHU Zeqi |
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| Affiliation: | ZHANG Yumin1,LI Huan1,ZHU Zeqi2(1.School of Resource and Environment,North China Institute of Water Conservancy and Hydroelectric Power,Zhengzhou 450011,China,2.China State Key Laboratory of Geo-mechanics and Geo-technical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China) |
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| Abstract: | The dynamic numerical model of a gorge site is established,and the depth attenuation and topographic effect of horizontal peak acceleration(HPA)of the gorge site under the Panzhihua earthquake record is analyzed.In addition,the influence of different parameters of the gorge site on propagation characteristics of seismic wave is studied.The results of numerical simulation show that HPA decreases with depth increasing,and HPA at slope toe is smaller than that at the gorge bottom;the HPA is amplified at the mo... |
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| Keywords: | gorge site seismic motion depth attenuation topographic effect propagation characteristics |
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