空间钢构架混凝土框架结构抗震性能试验研究和设计建议  

Experimental study and design recommendations on seismic behavior of spatial steel frame concrete frame structures

作　　者：唐兴荣[1] 何葆林[1] 

机构地区：[1]苏州科技学院江苏省结构工程重点实验室,江苏苏州215011

出　　处：《建筑结构学报》2009年第3期45-52,共8页Journal of Building Structures

基　　金：建设部科技研究项目(99-031-2)

摘　　要：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 load-bearing lightweight steel structure can be built by welding the transverse and inclined lace bars on longitudinal chords, forming a kind of spatial steel frame. The concrete structure with spatial steel frame is gained by substituting spatial welding steel frame for binding steel skeleton in reinforced concrete structure. In order to study the seismic behavior of spatial steel frame concrete frame, including its bearing capacity, deformation capability, ductility as well as failure mechanism, the comparison of the tests of 2 spatial steel frame concrete frames and 1 reinforced concrete frame subjected to the low cyclic reversed load were carried out. The results of the tests showed that the initial stiffness of the spatial steel frame concrete frame is almost the same as that of the reinforced concrete frame. The stiffness degradation of the spatial steel frame concrete frame is slower than that of the reinforced concrete frame after yielding of the specimen. Under the same reinforcement ratio, the ductility of the spatial steel frame concrete frame is better than that of the reinforced concrete frame. Based on the tests and analysis, the restoring force models and design recommendations of such structure are presented.

关 键 词：空间钢构架 混凝土框架 低周反复荷载试验 抗震性能 设计方法 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1