| 土层性质对入射平面P波场地放大效应的影响 |
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| 引用本文： | 刘月红,刘涛,宋金龙. 土层性质对入射平面P波场地放大效应的影响[J]. 山东建筑大学学报, 2007, 22(3): 198-202 |
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| 作者姓名： | 刘月红 刘涛 宋金龙 |
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| 作者单位： | 北京市建筑工程研究院,北京,100039;荣成市建设工程勘察设计审查中心,山东,荣成,264300 |
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| 摘 要： | 采用直接刚度法，在频域内求解了层状弹性半空间中入射平面P波的场地放大效应问题。将控制点选在假想基岩露头，通过集整土层及半空间的动力刚度矩阵，形成整个场地的动力刚度矩阵，利用场地离散动力平衡方程求解土层顶面位移幅值与控制点位移幅值的比值，即放大系数。本文分析了P波入射时，土层性质对刚度增长场地中含刚性土层场地和含软弱土层场地放大效应的影响。得出的结论可帮助预估自由场的地震反应。
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| 关 键 词： | 刚度增长土层 P波 土层性质 放大系数 |
| 文章编号： | 1673-7644（2007）03-0198-05 |
| 收稿时间： | 2006-11-23 |
| 修稿时间： | 2006-11-23 |
Influence of properties of soil layer on site amplification effect for P waves |
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| LIU Yue-hong,LIU Tao,SONG Jin-long. Influence of properties of soil layer on site amplification effect for P waves[J]. Journal of Shandong Institute of Architecture and Engineering, 2007, 22(3): 198-202 |
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| Authors: | LIU Yue-hong LIU Tao SONG Jin-long |
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| Affiliation: | 1. Dept. of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Rongcheng Building Engineering Exploration and Design Checking Center, Rongcheng 264300, China |
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| Abstract: | Amplification of P waves in a layered half-space was analyzed by direct stiffness method in frequency domain. The location of the control point was chose at an assumed rock outcrop. The dynamic-stiffness matrix of the total system was calculated by assembling the matrices of individual elements. The ratio of the absolute values of the displacement amplitudes at the top of the layer and at outcropping of the bedrock was computed by solving the diseretized dynamic equilibrium equation of the site. In a site with increasing stiffness, the analysis was done on the influence of properties of soil layer on the amplification effect for the incident P waves of a site with stiffness layer and site with soft layer. The conclusion can help forecast the result of response of a freefield to earthquake. |
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| Keywords: | increasing stiffness P waves properties of soil layer amplification |
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