| 群桩-承台体系动力阻抗的近似计算方法 |
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| 引用本文： | 雷文军,魏德敏.群桩-承台体系动力阻抗的近似计算方法[J].华南理工大学学报(自然科学版),2007,35(3):111-116,131. |
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| 作者姓名： | 雷文军 魏德敏 |
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| 作者单位： | 1. 华南理工大学,建筑设计研究院,广东,广州,510640
2. 华南理工大学土木工程系,广东,广州,510640 |
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| 摘 要： | 采用数值方法对群桩-承台体系的动力阻抗进行了分析.根据两个不同规模的群桩-承台体系的动力阻抗计算结果,发现在结构抗震所重点关注的低频段,群桩-土体-承台的动力相互作用与频率的相关性较小,因此可采用群桩-承台的静力相互作用关系代替其动力相互作用关系计算群桩-承台体系的动力阻抗.文中通过若干算例近似得到了群桩-承台的静力相互作用关系,并给出了利用群桩和承台的动力阻抗计算群桩-承台体系水平、摇摆和水平-摇摆耦合动力阻抗的简化计算公式.
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| 关 键 词： | 桩基 承台 动力相互作用 动力阻抗 |
| 文章编号： | 1000-565X（2007）03-0111-06 |
| 修稿时间： | 2006-05-09 |
Approximate Calculation of Impedance of Pile Group-Slab System |
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| Lei Wen-jun,Wei De-min.Approximate Calculation of Impedance of Pile Group-Slab System[J].Journal of South China University of Technology(Natural Science Edition),2007,35(3):111-116,131. |
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| Authors: | Lei Wen-jun Wei De-min |
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| Institution: | 1. Architecture Design and Research Institute, South China Univ. of Tech., Guangzhou 510640, Guangdong, China; 2. Dept. of Civil Engineering, South China Univ. of Tech., Guangzhou 510640, Guangdong, China |
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| Abstract: | In this paper,numerical procedures are first adopted to analyze the impedance of pile group-slab system.Based on the calculated impedance of two pile group-slab systems with different configurations,it is found that the dynamic interaction in the pile group-soil-slab system has low frequency dependence during the low-frequency vibration that is most concerned in the aseismatic design,so that,in the calculation of impedance of the pile group-soil-slab system,the dynamic interaction can be replaced by the static interaction.Based on the above-mentioned results,the static interaction in the pile group-slab system is then obtained via illustrations,and some simplified formulae for calculating the lateral,rocking and cross-lateral-rocking impedances of the system are presented. |
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| Keywords: | pile foundation slab dynamic interaction impedance |
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