Experimental study on seismic behavior of prefabricated CFST composite frames
Wang Donghua1 Wang Jingfeng1,2 Li Beibei1 Pan Xuebei1 Liu Bingkang1
1. Hefei University of Technology， Hefei 230009, China；
2. Collaborative Innovation Center for Advanced Steel Structure Technology and Industrialization of Anhui , Hefei 230009, China
Abstract：The novel composite frames are composed of steel bar truss decks and traditional frames with steel beams and circular or square concrete-filled steel tubular columns connected with blind bolted end plate joints. In order to investigate the seismic behavior and failure mechanism of prefabricated CFST composite frames under seismic action, two two-layer one-span specimens of high strength blind bolted flush or extended endplate connected frames between CFST columns and composite beams were conducted. The influence of column section type and the end plate type on the failure modes and seismic performance of composite frames were studied. The whole loading progress and failure characteristics of two specimens under low cycle loading were discussed. The hysteretic curves, skeleton curves, stiffness degradation curves, ductility and the energy dissipation capacity were also analyzed. The test results show that prefabricated CFST composite frames have good hysteretic behavior and energy dissipation. The ductility coefficient μ is between 2.13 and 4.28, the energy dissipation coefficient E is between 0.652 and 0.90. Under the same steel ratio of the column section, the ultimate bearing capacity of square CFST composite frames is higher than that of circular CFST composite frame respectively. The ductility and the energy dissipation capacity of circular CFST composite frames are better than those of square CFST composite frames. The study results can provide reference for the design theory and application of assembly CFST composite frame.
王冬花 王静峰 李贝贝 潘学蓓 柳炳康. 装配式钢管混凝土组合框架的抗震性能试验研究[J]. 土木工程学报, 2017, 50(8): 20-28.
Wang Donghua Wang Jingfeng Li Beibei Pan Xuebei Liu Bingkang. Experimental study on seismic behavior of prefabricated CFST composite frames. 土木工程学报, 2017, 50(8): 20-28.
