Optimal arrangement of viscoelastic dampers for seismic control of adjacent shear-type structures  

作　　者：Xiao HUANG Hong-ping ZHU 

机构地区：[1]School of Civil Engineering and Mechanics, Huazhong University of Science and Technology [2]Hubei Key Laboratory of Control Structure, Huazhong University of Science and Technology

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2013年第1期47-60,共14页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project supported by the National Natural Science Foundation of China (No. 51178203);the National Science Foundation for Distinguished Young Scholars of China (No. 50925828)

摘　　要：The optimal arrangement of viscoelastic dampers (VEDs) used to link two adjacent shear-type structures under seismic excitation was investigated. A two-step optimal design method is proposed. First, optimal parameter expressions of the Kelvin model are used to calculate the optimal stiffness and damping coefficient of the VEDs. Then, using the two-step optimal design method, taking the quadratic performance index as the optimization objective, the optimal arrangement of the dampers is determined. General rules about the optimal arrangement of the VEDs were obtained. The results show that the placement of only one damper between two adjacent shear-type structures should be avoided; if more than one damper is used, they should be distributed on the top and lower floors of the structures. Optimization of the number of dampers had little effect on response reduction. The most important factor was the optimization of the placement of the dampers. Through comparative study, for buildings of equal and unequal heights, the optimal parameters of dampers from parametric studies were shown to match the theoretical results for different numbers and placements of dampers. The level of response reduction was shown to be sensitive to the damping coefficient of the dampers.The optimal arrangement of viscoelastic dampers （VEDs） used to link two adjacent shear-type structures under seismic excitation was investigated. A two-step optimal design method is proposed. First, optimal parameter expressions of the Kelvin model are used to calculate the optimal stiffness and damping coefficient of the VEDs. Then, using the two-step optimal design method, taking the quadratic performance index as the optimization objective, the optimal arrangement of the dampers is determined. General rules about the optimal arrangement of the VEDs were obtained. The results show that the placement of only one damper between two adjacent shear-type structures should be avoided; if more than one damper is used, they should be dis- tributed on the top and lower floors of the structures. Optimization of the number of dampers had little effect on response reduction The most important factor was the optimization of the placement of the dampers. Through comparative study, for buildings of equal and unequal heights, the optimal parameters of dampers from parametric studies were shown to match the theoretical results for different numbers and placements of dampers. The level of response reduction was shown to be sensitive to the damping coefficient of the dampers.

关 键 词：Adjacent shear-type structures Viscoelastic damper （VED） Optimal arrangement Seismic response 

分 类 号：TU352.1[建筑科学—结构工程]