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[1]王珏,周叮,刘伟庆,等.层状地基中考虑土体剪切效应的单桩振动阻抗分析[J].南京工业大学学报(自然科学版),2013,35(05):1-8.[doi:10.3969/j.issn.1671-7627.2013.05.001]
 WANG Jue,ZHOU Ding,LIU Weiqing,et al.Vibration impedance analysis on single pile considering soil shear effect in layered foundation[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2013,35(05):1-8.[doi:10.3969/j.issn.1671-7627.2013.05.001]
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层状地基中考虑土体剪切效应的单桩振动阻抗分析()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
35
期数:
2013年05期
页码:
1-8
栏目:
出版日期:
2013-09-20

文章信息/Info

Title:
Vibration impedance analysis on single pile considering soil shear effect in layered foundation
文章编号:
1671-7627(2013)05-0001-08
作者:
王珏周叮刘伟庆王曙光杜东升
南京工业大学 土木工程学院,江苏 南京 211800
Author(s):
WANG JueZHOU DingLIU WeiqingWANG ShuguangDU Dongsheng
College of Civil Engineering, Nanjing University of Technology, Nanjing 211800, China
关键词:
土与基础动力相互作用 双参数地基 阻抗函数
Keywords:
pile soil-foundation dynamic interaction two-parameter foundation impedance function
分类号:
TU470;O347
DOI:
10.3969/j.issn.1671-7627.2013.05.001
文献标志码:
A
摘要:
在Winkler模型中引入描述地基土剪切效应的第二地基参数,采用初参数法求解双参数(Pasternak)地基模型中单桩水平振动的微分方程,运用传递矩阵法得到层状地基中单桩水平和回转振动的阻抗。与实例比较验证了理论推导及程序编制的正确性。分析表明:随着桩土弹模比的减小,第二地基参数对桩顶阻抗的影响有增大的趋势,此时使用双参数地基模型进行分析是必要的。对桩顶振动阻抗的影响因素(桩土弹模比、地基成层性、桩底边界条件、桩身长径比、量纲为1的频率)进行了参数化分析,结果表明:表层土的桩土弹模比是桩水平振动最重要的影响因素,振动阻抗随桩土弹模比的增大而减小,而有效桩长则随弹模比的增大而增大。
Abstract:
Based on Winkler foundation model, the second soil elastic parameter was introduced to consider the shear effect in the elastic foundation. The differential equation of the pile horizontal damped vibration in the two-parameter(Pasternak)layer foundation was solved by an initial parameter method. The transfer matrix method was used to obtain the horizontal and rotational impedances, as well as the dynamic internal forces on different dimensionless frequencies. Compared the numerical results with the published data,the accuracy of the theoretical derivation and the calculation program was proved. The analysis showed that the influence of the second soil elastic parameter became more obvious when pile-soil elastic modulus ratio decreased. It was necessary to build a two-parameter foundation model in that case. The influence of factors on impedance, such as the pile-soil elastic modulus ratio, the layered property of the foundation, the aspect ratio and bottom conditions of a pile and the dimensionless frequency was discussed. The parameter study demonstrated that the pile-topsoil elastic modulus was the most important factor affecting the dynamic properties of a pile. Impedance values decreased fast with the increase of the ratio, while the effective pile length increased with the increase of the ratio.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-11-30
基金项目:土木工程防灾国家重点实验室开放课题(SLDRCE10-MB-06); 江苏省自然科学基金(SBK201322459); 江苏省研究生科研创新计划(CXZZ12_0429)
作者简介:王珏(1988—),女,江苏苏州人,博士生,主要研究方向为土与结构动力相互作用; 周叮(联系人),教授,E-mail:dingzhou57@yahoo.com..
更新日期/Last Update: 2013-09-07