Torsional vibrations of a cylindrical foundation embedded in a saturated poroelastic half-space

作     者：Dazhi WU Lu YU 

作者机构：School of Civil Engineering and Architecture Zhejiang Sci-Tech University Hangzhou 310018 China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2015年第9卷第2期

页      面：194-202页

核心收录：

学科分类：08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：国家自然科学基金 the Program for Zhejiang Leading Tearm of S&T Innovation 

主　　题：embedded foundation saturated soil rigid foundation elastic foundation torsional vibration 

摘      要：Considering the interactions between an embedded foundation and saturated soil, the torsional vibrations of a cylindrical foundation embedded in a saturated poroelastic medium are analyzed in this paper. Both a rigid foundation and an elastic foundation are considered. Assuming both the side surface and the bottom surface of the foundation are perfectly bonded to soil, the reaction torques that the side soil and bottom soil acting on the foundation can be gained from basic dynamic equations of the poroelastic medium. According to the dynamic equilibrium equations of a foundation under harmonic torque, the torsional vibrations of an embedded cylindrical foundation are presented. Besides, the angular amplitude of the foundation, the equivalent stiffness and damping coefficients of the soil are expressed explicitly. Selected examples are presented to investigate the influence of relevant parameters on the torsional vibrations.