摘要
用解析方法研究了下卧基岩的Gibson地基的动力问题.基于Biot动力固结方程,考虑了土体和水体的惯性力以及水土耦合作用的影响,采用Hankel积分变换求解耦联合方程组,得到动荷载下饱和土振动问题的解答.根据下边界为不透水基岩的边界条件,获得了地基表面作用圆形轴对称周期荷载时土层应力、位移等的一般积分形式解,并利用矩阵传递法完成了对多层地基和Gibson地基的计算.研究表明,激振频率的影响与渗透系数密切相关;随着层厚的增加,反射波的影响迅速衰减.
The dynamic problems of Gibson soils were studied by analytical method. Biot's dynamic consolidation equations, and Hankel transform and transfer matrix method were used to derive the integral solutions of stress and displacement for axisymmetric harmonic excitations. In the study of layered soil with subjacent rock-stratum, the analysis of the influence of echoes generated by the boundary and interfaces of the soils reveals that it attenuates with the soil depth. Study of the effects of the loading frequency on the results shows that they are related to the soil permeability.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2004年第8期1015-1019,共5页
Journal of Zhejiang University：Engineering Science
关键词
GIBSON地基
LAMB问题
饱和地基
Attenuation
Dynamics
Loads (forces)
Matrix algebra
Saturation (materials composition)
Vibrations (mechanical)
