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Vibration Control of Soil-structure Systems and Pile-soil-structure Systems
Lihua Zou,Leiqing Fang,Kai Huang,Liyuan Wang 대한토목학회 2012 KSCE JOURNAL OF CIVIL ENGINEERING Vol.16 No.5
The purpose of this paper is to investigate the influence of Soil-Structure Interaction (SSI) and Pile-Soil-Structure Interaction (PSSI) on vibration control effect. Assuming the ground as an isotropic elastic half space and the soil around the foundation as a horizontal and rotational spring-dashpot system, a SSI model for buildings with rigid shallow foundations is established. Based on Penzien model, a PSSI model for structures with pile-foundations is also set up. Then, after the motion and control equations of the SSI system and PSSI system are derived, the influences of SSI and PSSI on vibration control are investigated. Important parameters of soil and structures are studied. Numerical results show that the SSI and PSSI have an obvious influence on the control effect of structures. Parameters such as shear-wave velocity, embedded depth of soil and stiffness of superstructure and pile, play a significant role in vibration control. The influences of SSI and PSSI mainly depend on characteristics of the upper soil layer, hence, the SSI influence on buildings with rigid foundations is more obvious than that of PSSI on buildings with pile foundations.
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