1.Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,Southeast University, Nanjing 210096, China;
2.Key Laboratory of Building Safety and Built Environment, Beijing 100088, China
Based on a nine-story moment-resisting braced steel frame and a nonmoment-resisting braced steel frame, a self-centering buckling-restrained brace (SC-BRB) frame was designed with the equivalent strength criterion and the equivalent core plate area criterion, respectively. The nonlinear time history analyses were conducted for six braced frame models under ten different seismic waves. The results demonstrated that compared to a BRB frame, a SC-BRB frame has a stronger capacity of restraining its residual deformation; since the structure damage caused by earthquakes of the nonmoment-resisting braced steel frame is smaller than that of the moment-resisting braced steel frame, the former exhibits a better self-centering performance; the floor acceleration and axial bracing force of the SC-BRB frame designed with the equivalent strength criterion are smaller than those of the SC-BRB frame designed with the equivalent core plate area criterion because the brace stiffness of the former is smaller; compared to the SC-BRB frame designed with the equivalent strength criterion, the SC-BRB frame designed with the equivalent core plate area criterion has a stronger capacity of restraining story drifts due to its stronger capacity of energy dissipation; furthermore, the bigger pretension force and cross-section area of braces are helpful to the improvement of the frame's self-centering performance and the restrainment of weak stories.
谢钦1.2，周臻1.2，王维影1.2，孟少平1.2. 两种设计原则下自定心屈曲约束支撑框架的抗震性能分析[J]. 振动与冲击, 2017, 36(3): 125-131.
XIE Qin1,2,ZHOU Zhen1,2,WANG Weiying1,2,MENG Shaoping1,2. Aseismic performance analysis for braced frame systems with self-centering buckling-restrained braces with two different design criteria. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(3): 125-131.
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