Seismic performance evaluation of typical dampers designed by Chinese building code  

作　　者：Guo Wei Wu Jun Hu Yao Li Yunsong Yang T.Y. 

机构地区：[1]School of Civil Engineering, Central South University [2]National Engineering Laboratory for High Speed Railway Construction [3]Department of Structural Engineering, Tongji University [4]Department of Civil Engineering, University of British Columbia

出　　处：《Earthquake Engineering and Engineering Vibration》2019年第2期433-446,共14页地震工程与工程振动（英文刊）

基　　金：National Natural Science Foundation of China under Grant No.51108466;Development Program for Changjiang scholars and innovative team under Grant No.IRT1296;the Project of Innovation-Driven Plan in Central South University

摘　　要：Adding dampers is a commonly adopted seismic risk mitigation strategy for modern buildings, and the corresponding design procedure of dampers has been well established by the Chinese Building Code. Even though all types of dampers are designed by the same procedure, actual seismic performance of the building may differ from one to the others. In this study, a nine-story benchmark steel building is established, and three different and typical types of dampers are designed according to the Chinese Building Code to realize structural vibration control under strong earthquake excitation. The seismic response of the prototype building equipped with a viscoelastic damper, viscous damper and buckling-restrained brace(BRB) subjected to 10 earthquake records are calculated, and Incremental Dynamic Analysis(IDA) is performed to describe progressive damage of the structure under increasing earthquake intensity. In the perspective of fragility, it shows that the viscoelastic damper has the highest collapse margin ratio(CMR), and the viscous damper provides the best drift control. Both the BRB and viscoelastic dampers can effectively reduce the floor acceleration responses in the mid-rise building.Adding dampers is a commonly adopted seismic risk mitigation strategy for modern buildings, and the corresponding design procedure of dampers has been well established by the Chinese Building Code. Even though all types of dampers are designed by the same procedure, actual seismic performance of the building may differ from one to the others. In this study, a nine-story benchmark steel building is established, and three different and typical types of dampers are designed according to the Chinese Building Code to realize structural vibration control under strong earthquake excitation. The seismic response of the prototype building equipped with a viscoelastic damper, viscous damper and buckling-restrained brace(BRB) subjected to 10 earthquake records are calculated, and Incremental Dynamic Analysis(IDA) is performed to describe progressive damage of the structure under increasing earthquake intensity. In the perspective of fragility, it shows that the viscoelastic damper has the highest collapse margin ratio(CMR), and the viscous damper provides the best drift control. Both the BRB and viscoelastic dampers can effectively reduce the floor acceleration responses in the mid-rise building.

关 键 词：CHINESE building design code viscoelastic DAMPER VISCOUS DAMPER buckling-restrained BRACE seismic response FRAGILITY analysis 

分 类 号：P[天文地球]