摘要
本文根据连续介质力学理论,考虑平面应变假设,按桩-土-桩动力相互作用概念,研究了群桩中每两根桩的关系,并利用等效单桩的原理,将群桩动力问题转化为等效单桩动力问题,使分析得到简化。分析中采用了传递矩阵的方法,可方便而有效地考虑土的分层。在水平摇摆振动的分析中,还考虑了桩的竖向运动对摇摆刚度的贡献。 根据本文的理论和方法,用自编专用程序SPGSIA分析了土-群桩系统的动力特性;并用动力子结构及快速富里叶变换技术分析了土-群柱-结构系统的相互作用地震反应。通过本文的研究,得到了一些规律性的结果。
In this paper, based on the theory of continuum mechanics and the assumption of plane strain as well as the concept of pile-soil-pile dynamic interaction, the relationship between every two piles in pile group is investigated. According to the principle of equivalent single pile, the problem of pile group is reduced to that of e-quivalent single pile with the result that the analysis is much simplified. In addition, the characteristics of layered soil can be effectively considered by use of The Transfer Matrix Method. For analyzing the horizontal-rocking vibration, the contribution of pile vertical vibration to rocking stiffness is taken into consideration.According to the above-mentioned theory and procedure, a special computer program SPGSIA is compiled to analyze the dynamic behavior of soil-pile group system and the earthquake response of soil-pile group structure interaction using dynamic substructure method and the FFT technique. On the basis of the present research, some regularities of these systems have been obtained.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
1990年第3期64-79,共16页
Journal of Building Structures
