Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (3): 111-116,131.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Approximate Calculation of Impedance of Pile Group-Slab System

Lei Wen-jun1  Wei 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.

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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