摘要
在轴对称的条件下,考虑管桩土相互作用,运用分离变量法求解土层扭转振动,借助土层和管桩桩端边界条件以及三角函数正交性求解管桩扭转振动问题,并通过数值算例讨论相关参数对管桩—土耦合扭转振动的影响.研究表明,管桩—土系统的耦合扭转振动存在共振现象,管桩内外半径比、桩和桩周土模量比对管桩桩顶扭转复刚度影响很大,桩芯土与桩周土模量比和桩芯土与桩周土密度比在低频时对管桩桩顶扭转复刚度几乎无影响,高频时有影响.
The torsional vibration of soil is solved by separation variable method by considering interaction between pipe pile and soil under axisymmetric condition,and the torsional vibration of pipe pile in soil is investigated with the orthogonality of trigonometric functions by considering the boundary conditions of soil and pipe pile,and the influence of related parameters on the coupling torsional vibration of pipe pile.The research indicate that the resonance phenomenon is existed,and the radius ration between inside and outside of pipe pile and modulus ratio between and pile around soil have great effect on the complex stiffness of pipe pile at head,but the influence of modulus ratio and density ratio between inner soil and pile around soil is very little at lower frequency,but the influence is larger at higher frequency.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2012年第1期36-39,共4页
Journal of Zhengzhou University（Engineering Science）
关键词
扭转振动
相互作用
复刚度
分离变量法
管桩
torsional vibrations
interaction
complex stiffness
separation variable method
pipe pile
