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空间钢构架是由横向和斜向缀条与纵向弦杆焊接而成的承重轻钢结构,将空间钢构架替代普通钢筋混凝土结构中的绑扎钢筋骨架,形成空间钢构架混凝土结构。为研究空间钢构架混凝土框架结构的承载力和变形能力、滞回曲线和骨架线、延性、耗能能力等抗震性能指标及其变形和破坏机制,进行了2榀空间钢构架混凝土框架和1榀普通钢筋混凝土框架试件低周反复荷载的对比试验。试验表明:空间钢构架混凝土框架结构的初始刚度与普通钢筋混凝土框架结构的初始刚度基本相同,在试件屈服后,空间钢构架混凝土框架结构的刚度退化程度要比普通钢筋混凝土框架结构缓慢,其延性要比配筋率相同的普通钢筋混凝土框架结构好。结合试验结果及其分析,给出了空间钢构架混凝土框架结构的抗侧力恢复力模型和设计建议。
The space steel frame is a load-bearing lightweight steel structure welded by horizontal and oblique strips and the longitudinal chord, and the space steel frame replaces the bound steel frame in the common reinforced concrete structure to form a space steel frame concrete structure. In order to study the seismic performance indexes such as bearing capacity and deformation capacity, hysteretic curve, skeletal line, ductility, energy dissipation capacity and deformation and failure mechanism of space steel reinforced concrete frame structure, a steel frame concrete frame with 2 榀 space and 1 榀Contrast test of low cycle repeated load of ordinary RC frame specimen. The experimental results show that the initial stiffness of the space steel frame concrete frame structure is basically the same as that of the ordinary reinforced concrete frame structure. The stiffness degradation of the space steel frame concrete frame structure is slower than ordinary reinforced concrete frame structure after yielding, Ductility than the same reinforcement ratio of ordinary reinforced concrete frame structure. Combined with the test results and analysis, the lateral resistance resilience model and design proposal of space steel frame concrete frame structure are given.