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J4  2010, Vol. 44 Issue (5): 935-941    DOI: 10.3785/j.issn.1008-973X.2010.05.017
土木与建筑工程     
饱和地基中埋置基础摇摆振动的动力放大系数
胡秀青, 蔡袁强, 徐长节
浙江大学 软弱土与环境土工教育部重点实验室, 浙江 杭州 310027
Dynamic response factor for rocking vibration of embedded
foundation in saturated soil
HU Xiuqing, CAI Yuan-qiang, XU Chang-jie
MOE Key Laboratory of Soft Soils and Geoenviromental Engineering, Zhejiang University, Hangzhou 310027, China
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摘要:

基于Biot动力控制方程,研究均质饱和半空间中埋置刚性圆柱基础在摇摆简谐力矩作用下的振动特性.土与基础在四周及基底保持完全黏着接触,相互之间无滑移.利用一种简化的解析方法求解相应的动力响应问题,并给出埋置基础摇摆振动时的动力放大系数随量纲一激振频率的变化曲线.为验证本文结果的正确性,将地基退化为单相弹性介质,计算相应的动力放大系数曲线,并与已有的结果进行对比.可以看出,量纲一激振频率、基础埋深比、基础质量比和渗透系数均对饱和地基中埋置基础摇摆振动的动力放大系数有很大的影响.

Abstract:

The rocking vibration of a rigid cylindrical foundation embedded in a homogeneous saturated halfspace was studied based on Biot’s theory of poroelastodynamics. The foundation was subjected to the timeharmonic rocking excitation and was perfectly bonded to the surrounding soil. The dynamic interaction problem was solved by employing an approximate analytical method. The analysis was performed in the frequency domain. The accuracy of the present solution was verified by degenerating the saturated soil to elastic soil and compared with the existed solutions for an ideal elastic soil. Numerical results for dynamic response factor of embedded foundations indicate that the nondimensional frequency of excitation, the depth ratio of foundation, the mass ratio of the foundation and the soil permeability all have significant effect on the rocking vibration of embedded foundation in saturated soil.

出版日期: 2012-03-19
:  TU 435  
基金资助:

国家自然科学基金资助项目(50808145,50979096,50778136);浙江省自然科学基金资助项目(Y1090105);浙江省建设厅科研资助项目(08Z027);浙江省高校优秀青年教师计划资助项目.

通讯作者: 蔡袁强,男,教授,博导.     E-mail: caiyq@zju.edu.cn
作者简介: 胡秀青(1981—),女,山东泰安人,博士生,从事地基与基础动力相互作用的研究. E-mail:xiuxiu128@zju.edu.cn
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引用本文:

胡秀青, 蔡袁强, 徐长节. 饱和地基中埋置基础摇摆振动的动力放大系数[J]. J4, 2010, 44(5): 935-941.

HU Xiu-Jing, CA Yuan-Jiang, XU Chang-Jie. Dynamic response factor for rocking vibration of embedded
foundation in saturated soil. J4, 2010, 44(5): 935-941.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2010.05.017        http://www.zjujournals.com/eng/CN/Y2010/V44/I5/935

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