饱和均质土中PCC桩纵向振动响应简化解析方法  

Simplified analytical solution for vertical vibration of PCC piles in saturated soils

作　　者：郑长杰[1,2] 丁选明[1,2] 刘汉龙[1,2] 付强[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《岩土工程学报》2013年第S2期1087-1090,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金高铁联合基金重点项目(U1134207);江苏省自然科学基金项目(BK2012811);新世纪优秀人才支持计划资助

摘　　要：基于经典的平面应变假定,对饱和土地基中现浇大直径管桩纵向振动频域特性进行了理论研究。将桩周土和桩芯土假设为一系列相互独立的薄层,采用Laplace变换的方法求得了桩周土及桩芯土频域响应解,进而利用桩土完全耦合的条件得到桩振动响应解。分析了土体剪切模量以及桩周土、桩芯土存在与否对桩顶复刚度的影响,得到了各参数对桩振动特性影响的规律。Based on the classical plane strain assumption, the frequency-domain vertical dynamic response of cast-in-situ large-diameter concrete pipe piles in saturated soils is investigated. The outer and inner soils are considered as a series of independent thin layers, the analytical solutions for the outer and inner soils in frequency domain are obtained by Laplace transform technique. Under the assumption of perfect contacts between the piles and both the outer and inner soils, the pile response is derived. The effects of the shear modulus of soil and the existence of the outer and inner soils on the complex stiffness are analyzed.

关 键 词：PCC桩 平面应变假定 纵向振动 解析解 复刚度 

分 类 号：TU473.1[建筑科学—结构工程]