Author(s): LI G uochang, MA Xiaolong, LI Wenming, School of Civil Engineering, Shenyang Jianzhu University
Pages: 401-407
Year: 2015 Issue:  3
Journal: Journal of Shenyang Jianzhu University(Natural Science)
Keyword:  OpenSees; BRB; concrete frame; push-over; seismic performance;
Abstract: To give reasonable seismic design suggestions,this paper studied the seismic performance of buckling-restrained brace( BRB) concrete frames with different parameters. Taking into account of geometric nonlinearity and material nonlinearity,a model for concrete frame structure of 4stories and 3 bays was built and analyzed. Based on this basis,influences of stiffness of the external steel tube,strength of the concrete and stiffness of the core steel on the seismic performance of BRB were obtained. It is found that the external steel tube thickness has significant influence on the seismic performance and steel tube with thickness 5 mm should be used. The story drift of restrained concrete frames is within 10%,that means the influence of restrained concrete strength is secondary. Using C20 concrete is appropriate. Conclusion is that concrete frame with BRB has goodseismic performance. The peripheral stiffness of BRB has significant effect on the seismic performance; but the influence of strength of internal restrained concrete is small.