纵向瞬态荷载下基桩的动力响应分析  

Dynamic response of piles subjected to transient longitudinal loading

作　　者：武丹丹[1] 杨成斌[1] 王江涛 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]安徽省金田建筑设计咨询有限责任公司,安徽合肥230051

出　　处：《河北工程大学学报（自然科学版）》2014年第2期43-46,51,共5页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：文章根据桩土系统波动理论,在桩顶施加竖向瞬态激振力情况下,对基桩竖向振动的时域和频域分析进行理论研究。对完整桩时域速度曲线进行拟合处理,分析桩身、桩侧、桩底参数对完整桩时域速度曲线和速度振幅谱曲线的影响,对非完整桩(缩径桩、扩径桩、断桩)也进行类似的分析处理。研究表明:桩土参数的变化对曲线产生了影响,桩侧土剪切波速越大桩底反射衰减的越多,理论波形图和工程桩动测波形图显示出很好的一致性。Based on the wave theory of the pile - soil system, time domain analysts and frequency do- main analysts of pile longitudinal vibration, with a vertical transient impact force applied to the pile top, are studied theoretically. The time - domain velocity curve of integrate pile are fitted with the theoretical curve. The characteristics of time - domain velocity and velocity amplitude spectrum curve of integrate pile are analyzed when pile -soil parameters are changed, similar analysis are studied for non -intact piles （expanding, reducing, segregation）. The results shows that the changes have influ- ence on curves, the larger the pile side soil shear wave velocity, the more the pile bottom reflection attenuation. The theoretical response correlates well with the dynamic testing of an engineering pile by the reflected wave method.

关 键 词：桩土系统 速度时域曲线 速度振幅谱曲线 

分 类 号：TU473.16[建筑科学—结构工程]