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Shock and Vibration
Volume 2017 (2017), Article ID 9629083, 16 pages
https://doi.org/10.1155/2017/9629083
Research Article

Optimal Design of Viscoelastic Dampers in Frame Structures considering Soil-Structure Interaction Effect

College of Civil Engineering, Nanjing Tech University, Nanjing 210009, China

Correspondence should be addressed to Shuguang Wang; moc.anis.piv@801027

Received 6 May 2016; Accepted 26 September 2016; Published 5 January 2017

Academic Editor: Giuseppe C. Marano

Copyright © 2017 Xuefei Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The seismic response control of multistory frame structures using optimally placed viscoelastic dampers (VEDs) within consideration of soil-structure interaction (SSI) effect is investigated in this paper. The system is assumed to be elastic and responses of the system are obtained in frequency domain for stationary random seismic excitations. The optimal designs of VEDs in structures are achieved through genetic algorithm (GA) by minimizing the maximum response quantities of the system for a determined total amount of viscoelastic material. Two typical elastic multistory frame structures with different soil types and foundation embedment ratios are considered to demonstrate the optimization process. It is shown that the VEDs have the best control of the structural response for fixed base condition and the control efficiency decreases as the soil becomes softer. The optimal placement types of VEDs for different soil types differ from each other. With the decrease of soil stiffness, the optimal locations of VEDs have a tendency to shift to top floors.