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（1 廣州大學土木工程學院， 廣州 510006； 2 廣州大學工商管理學院， 廣州 510006;3 廣東省建筑設計研究院， 廣州 510380； 4 華南理工大學廣州學院， 廣州 510640)
［摘要］依據(jù)《建筑抗震設計規(guī)范》(GB 50011—2010)提出的消能減震結(jié)構(gòu)設計中附加有效阻尼比的確定方法，結(jié)合實際BRB消能減震結(jié)構(gòu)，采用包絡法、時變法及綜合法三種取值方法，分別計算BRB的附加有效阻尼比，將計算所得附加有效阻尼比疊加回原結(jié)構(gòu)，對疊加后結(jié)構(gòu)進行彈塑性時程分析，對比其與BRB消能減震結(jié)構(gòu)的響應。結(jié)果表明：包絡法計算簡捷、精度略低，計算結(jié)果較安全保守；時變法計算繁復、精度較高，較符合實際；綜合法計算繁復程度和精度均介于包絡法和時變法之間，此研究可為BRB消能減震結(jié)構(gòu)計算附加有效阻尼比提供參考，亦可作為其他位移及速度型消能減震結(jié)構(gòu)計算附加有效阻尼比的參考。
［關(guān)鍵詞］消能減震結(jié)構(gòu)； 附加有效阻尼比； 計算方法
中圖分類號：TU311-4文獻標識碼：A文章編號：1002-848X(2018)17-0089-07
Research on the calculation method of additional effective damping ratio in the design of BRB energy dissipation structure
Xu Xin1,2, Ou Tong3, Zhou Yun1, Sun Zuoyu1, Duan Jing4
(1 College of Civil Engineering, Guangzhou University, Guangzhou 510006, China; 2 School of Business, Guangzhou University, Guangzhou 510006, China; 3 Architectural Design and Research Institute of Guangdong Province, Guangzhou 510380, China; 4 Guangzhou College of South China University of Technology, Guangzhou 510640, China)
Abstract:According to the determination method of additional effective damping ratio during the design of BRB energy dissipation structure in Code for seismic design of buildings (GB 50011—2010), combined with the actual BRB energy dissipation structure, the additional effective damping ratio of BRB was calculated by three methods, including envelope method, time variation method and comprehensive method. The additional effective damping ratio was added back to the original structure, and the elastoplastic time history analysis of the superimposed structure was carried out. The response of the structure was compared with that of the BRB energy dissipation structure. The results show that the calculation of envelope method is simple, but less accurate, and the calculation result is safer and conservative. The calculation of time variation method is complex and accurate, and more in line with reality. The complexity and precision of comprehensive method is between envelope method and time variation method. This study can provide a reference for selecting calculation method of additional effective damping ratio in the design of BRB structure, and also can be used for calculating the additional effective damping ratio of other displacement and velocity energy dissipation structures.
Keywords:energy dissipation structures; additional effective damping ratio; calculation method
*廣州大學研究生創(chuàng)新研究資助計劃（2017GDJC-D19）。
作者簡介：徐昕，博士，工程師，Email: xuxin198719@163.com。
