【摘要】 为了使钢结构初始刚度能够在一定范围内渐变,且增加的构件安装或拆卸方便,设计一种新型的抗震加固结构体系即钢筋混凝土深梁。通过1个纯钢框架和2个缩尺混凝土深梁填充钢框架的水平低周反复荷载试验,得到内填混凝土深梁钢框架结构的滞回曲线。在试验的基础上,分析深梁对纯钢框架的承载能力、延性、滞回特性和耗能能力的影响。结果表明:内填深梁大幅度提高了钢框架的初始刚度和承载能力;试件的滞回曲线饱满且骨架曲线有明显的塑性流动阶段;钢框架的延性和耗能能力都得到增强,证明内填深梁钢框架结构抗震性能良好,因此,混凝土深梁可作为结构抗震设防的第一道防线,钢框架作为第二道防线。更多还原

【Abstract】 To realize the modulation of initial stiffness of steel structure and make the structure easily be assembled and removed,reinforced concrete deep beam,i.e.,a new anti-seismic reinforcing structure,was introduced.By cyclic loading model test of one steel frame and two deep beam infilled steel frames,the hysteresis loops were obtained.Based on the experiment,effects of the deep beam on the load capacity,ductility,hysteretic property and energy-dissipation of the pure steel structure were analyzed.The results show that the deep beam enhances the initial stiffness and load capacity by a large margin,and the hysteresis loops are replete and the skeleton curves have apparent stage of plastic flow,and the ductility and energy dissipation capacity of the test pieces are enhanced.Therefore,the deep beam can be used as the first defense line of earthquake-resistance,and the steel frame can be used as the second.更多还原