Experimental studies on seismic performance of prefabricated concrete frame structures with buckling-restrained braces
Wang Jingfeng1,2 Wang Xinle1 Li Beibei1 Wang Bo1 Deng Quan1
1. Hefei University of Technology, Hefei 230009, China;
2. Key Lab of Anhui Civil Engineering Structures and Materials, Hefei University of Technology, Hefei 230009, China
Energy-dissipation earthquake-reduction technology can effectively improve the seismic performance of prefabricated concrete (PC) structures and can improve their failure modes. However, studies on the PC frame structures with buckling-restrained braces (BRBs) are still lacking. Cyclic loading tests on three PC frames with BRBs and one cast-in-place concrete frame were conducted to investigate the seismic behavior and failure mechanism of PC frame with BRBs. Seismic performance of PC frames with BRBs and PC beam-column connections fabricated in integral type and hidden corbel type was studied under earthquake action. The experimental phenomena and failure characteristics were observed and recorded. The hysteretic curves, skeleton curves, ductility coefficients, stiffness degradation and energy dissipation capacity of the structures were analyzed. The test results show that the PC frames with BRBs have good energy dissipation capacity and ductility, the ductility coefficient μ is between 3.02 and 3.61, the energy dissipation E is between 1.464 and 1.759. It was verified that BRBs could effectively improve the seismic performance of PC frames and improve their failure modes. Novel construction detail between BRB and PC beam-column connection was developed to ensure the cooperative working between PC frame and BRBs under earthquake action. The studied results can provide scientific basis for the design and application of BRBs in PC frames.
王静峰 王新乐 李贝贝 王 波 邓 权. 屈曲约束支撑装配式混凝土框架结构抗震性能试验研究[J]. 土木工程学报, 2018, 51(12): 72-80.
Wang Jingfeng Wang Xinle Li Beibei Wang Bo Deng Quan. Experimental studies on seismic performance of prefabricated concrete frame structures with buckling-restrained braces. 土木工程学报, 2018, 51(12): 72-80.