华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (3): 111-116,131.

• 土木建筑工程 • 上一篇    下一篇

群桩-承台体系动力阻抗的近似计算方法

雷文军 魏德敏   

  1. 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
  • 收稿日期:2006-05-09 出版日期:2007-03-25 发布日期:2007-03-25
  • 通信作者: 雷文军(1971-),男,博士,主要从事土结构动力相互作用的研究. E-mail:leiwj@scut.edu.cn
  • 作者简介:雷文军(1971-),男,博士,主要从事土结构动力相互作用的研究.

Approximate Calculation of Impedance of Pile Group-Slab System

Lei Wen-junWei De-min2   

  1. 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
  • Received:2006-05-09 Online:2007-03-25 Published:2007-03-25
  • Contact: 雷文军(1971-),男,博士,主要从事土结构动力相互作用的研究. E-mail:leiwj@scut.edu.cn
  • About author:雷文军(1971-),男,博士,主要从事土结构动力相互作用的研究.

摘要: 采用数佳方法对群桩-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-承台的动力相王作用与频率的相关性较小,因此可采用群桩-承台的静力相王作用关系代替其动力相王作用关系计算群桩- 承台体系的动力阻抗.文中通过若干算例近似得到了群桩-承台的静力相王作用关系,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-摇摆相合动力阻抗的简化计算公式.

关键词: 桩基, 承台, 动力相互作用, 动力阻抗

Abstract:

In this paper , numerical procedures are first adopted to analyze the impedance of pile group-slab sys-tem.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 concemed 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 forrnulae for calculating the lateral , rocking and cross-lateral-rocking impedances of the system are presented.

Key words: pile foundation, slab, dynamic interaction, impedance