| 地基特性对土石坝地震反应的影响 |
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| 引用本文： | 林皋,高扬. 地基特性对土石坝地震反应的影响[J]. 大连理工大学学报, 1988, 0(1) |
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| 作者姓名： | 林皋 高扬 |
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| 作者单位： | 大连工学院土木工程系(林皋)，大连工学院土木工程系(高扬) |
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| 摘 要： | 将土石坝和地基均简化为一维剪切体系，考虑剪切模量沿坝高的变化特性以及地 基幅射阻尼的影响，应用主附结构体系相互作用的分析方法，提出了计算地基覆盖层对 土石坝地震反应影响的实用计算公式。实例计算结果表明，有覆盖层存在时坝上部三 分之一坝高范围内的地震反应一般均较刚基上有不同程度的放大，同时由于坝材料剪 切模量随深度的不均匀变化影响，坝顶部的动力反应系数进一步增大。
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| 关 键 词： | 土坝 地基 交互作用 动力响应 |
Effect of Foundation Soil Nature on the Dynamic Response of Earth and Rock Dams |
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| Lin Gao,Gao Yang. Effect of Foundation Soil Nature on the Dynamic Response of Earth and Rock Dams[J]. Journal of Dalian University of Technology, 1988, 0(1) |
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| Authors: | Lin Gao Gao Yang |
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| Abstract: | The extent and material properties of the underlying soft foundation layer has considerable influence on the seismic response of earth and rock dams. It is referred to as a structure-foundation interaction problem. A smiplified practical method is proposed for its analysis. The dam is idealized as one dimensional shear structure with stiffness properties varying along the depth. The foundation is assumed to have horizontally homogeneous multi-layers overlaying on the base rock and the energy dissipation caused by wave radiating into infinite lateral boundaries is approximately taken into consideration. Through practical examples it is found that the seismic response of the upper one third part of the dam resting on soft foundation soil is, in general, greater than that of the dam resting on rigid foundation. In addition, the variation of material stiffness along the depth of dam body tends to magnify the seismic response of the top part of the dam. |
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| Keywords: | earth dam foundation interaction dynamic response |
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