%0 Journal Article
%T Vertical vibration of an end bearing pile embedded in saturated soil<br>饱和土中端承桩纵向振动特性研究
%A Li Qiang~
%A <br>李强
%A 王奎华
%A 谢康和
%J 力学学报
%D 2004
%I 
%X Dynamic interaction of pile and soil plays an important role in structure design. Although many researches have been carried out on the field in past two decades, the emphasis is mainly focused on pile vibration in single phase medium. Such a fact has been neglected that soil is multi-phase medium. The effects of ground water on the interaction are seldom discussed. In this paper, vertical vibration of an end bearing pile embedded in a saturated soil layer is theoretically investigated. The pile is assumed to be vertical and can be dealt with one dimensional elastic theory. The soil is considered as a linear saturated isotropic poroelastic medium and satisfies rigorous three dimensional poroelasticity. Potential functions are applied to decouple governing differential equations of the soil layer originally presented by Blot. By virtue of differential operator splitting and variable separation method, soil vibration displacement solutions with an undetermined constant are obtained at first. Under the assumption of perfect contact between the pile and the soil, the pile response to an arbitrary vertical load is analytically derived in a closed form. Then harmonic complex stiffness and admittance at the pile head are defined in frequency domain. And velocity response in time domain is gained by means of Fourier inverse transform. Based on the solutions, a parametric study is conducted to determine the main features of the soil-pile interaction in vertical vibration. As a result, the pile slenderness and the pile-soil modulus ratio are major on the pile dynamic response, while the seepage force has minor influence on the response. Finally, it is shown that the theoretical curves are in good agreement with those obtained from field test.
%K soil-pile interaction
%K vertical vibration
%K saturated soil
%K complex stiffness
%K admittance
%K time domain
%K reflective wave<br>桩土相互作用
%K 纵向振动
%K 饱和土
%K 复刚度
%K 导纳
%K 时域
%K 反射波
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=66AABDE02C8DDE5D&yid=D0E58B75BFD8E51C&vid=933658645952ED9F&iid=E158A972A605785F&sid=8D75AD3BD0D1BCC5&eid=D98387EFB283C5E0&journal_id=0459-1879&journal_name=力学学报&referenced_num=25&reference_num=17