摘要
根据弹性稳定理论研究了摩擦桩在竖向谐振荷载下的横向振动问题,在基桩小变形下导出了基桩产生参数共振频率和振幅近似计算式,讨论了桩侧土抗力、外激振频率、桩的截面几何特征、桩土阻尼等因素对基桩动力能的影响。研究表明,基桩的动力不稳定定区域有多个,桩侧摩擦力、桩长和桩直径、桩土阻尼对桩的横向振动性能影响较大。并给出了摩擦桩的相关计算参数,提出了在实际工程中如何减小或避免基桩共振的相关措施。
Based on theory of elastic stability,transverse vibration of a friction pile under vertical harmonic loads is investigated.Approximate calculating formulas of frequency and amplitude for parameter resonance of the foundation pile is deduced under the situation of small deformation of the foundation pile.Some factors influencing the dynamic behavior of the foundation pile,such as,the pile side soil resistance,the exciting frequency,the geometic features of the pile cross setion and the pile soil damping are discussed.The investigation shows that there are several dynamic instable areas of the foundation pile;the friction on pile side,the length and the diameter of the pile,and the pile soil damping have bigger influence on the transverse vibration behavior of the pile.The corresponding calculating parameters of the friction pile are given and measurements of reducing or avoiding the foundation pile resonance in the actual engingeering are proposed.
出处
《振动与冲击》
EI
CSCD
北大核心
2006年第4期85-87,共3页
Journal of Vibration and Shock
基金
安微省优秀青年科技基金(04044057)
安微建筑工业学院博士基金项目
关键词
基桩
谐振荷载
动力稳定性
摩擦桩
弹性稳定理论
foundation pile
harmonic loads
dynamic stability
friction pile
elastic stability theory
