（1 广州大学土木工程学院， 广州 510006； 2 广州大学工商管理学院， 广州 510006;3 广东省建筑设计研究院， 广州 510380； 4 华南理工大学广州学院， 广州 510640)

［摘要］依据《建筑抗震设计规范》(GB 50011—2010)提出的消能减震结构设计中附加有效阻尼比的确定方法，结合实际BRB消能减震结构，采用包络法、时变法及综合法三种取值方法，分别计算BRB的附加有效阻尼比，将计算所得附加有效阻尼比叠加回原结构，对叠加后结构进行弹塑性时程分析，对比其与BRB消能减震结构的响应。结果表明：包络法计算简捷、精度略低，计算结果较安全保守；时变法计算繁复、精度较高，较符合实际；综合法计算繁复程度和精度均介于包络法和时变法之间，此研究可为BRB消能减震结构计算附加有效阻尼比提供参考，亦可作为其他位移及速度型消能减震结构计算附加有效阻尼比的参考。

［关键词］消能减震结构； 附加有效阻尼比； 计算方法

中图分类号：TU311-4文献标识码：A文章编号：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

*广州大学研究生创新研究资助计划（2017GDJC-D19）。

作者简介：徐昕，博士，工程师，Email: xuxin198719@163.com。