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Structure isolation based on dynamic soil-structure interaction

LU Hua-xi1,LIANG Ping-ying1,SHANG Shou-ping2,ZHU Zhi-hui3(1.School of Civil Engineering,East China Jiaotong University,Nanchang 330013,China;2.Civil Engineering College,Hunan University,Changsha 410082,China)3.School of Civil and Architectural Engineering,Central South University,Changsha 410075,China)  
Based on dynamic soil-structure interaction,a new structure isolation approach with soil-exchanging was presented through considering the isolation effect of soil in dynamic soil-structure interaction.The influence of the soil dynamic characteristics on the impedance of single pile was discussed according to the dynamic impedance of single pile in layered soil.Through soft soil-exchanging close to pile,the dynamic impedance of pile can be weakened obviously in hard site,and the earthquake action to superstructure can be weakened too,the isolation effect is obtained.The numerical example proves that the structure isolation approach is rational and feasible.
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