冷弯薄壁型钢空间节点滞回性能分析

Analysis of Space Node Hysteretic Performance of the Cold-formed Thin-walled Steel

总结分析当前用于建造冷弯薄壁型钢结构的节点力学性能,发现冷弯薄壁型钢结构体系中组合墙体和楼盖均为空间受力体系,连接部位不能简单地简化为梁柱节点,应考虑其空间作用。本文在此基础上进行了试验研究,结果表明:试验试件的破坏形态及破坏模式均为楼盖梁出现严重的塑性变形;试件滞回经历了弹性、弹塑性、塑性阶段;冷弯薄壁型钢试件有很好的耗能性能;轴压比对试件延性系数影响较大,当轴压比为0.2时,截面尺寸越大延性系数越大,而当轴压比为0.4时,截面尺寸越大延性系数越小。

The node mechanical properties of the construction of cold-formed thin-wall steel structures are analyzed and found that the composite walls and floor are spatial stress systems at present,the connection parts cannot simply be simplified as beam-column joints,and it should be considered as the spatial effect. In this paper,the results show that the test failure pattern and failure modes of the specimens are severe plastic deformation of floor beam on the basis of experimental study; Specimen hysteresis has experienced elastic,elastic-plastic and plastic stage; Cold-formed thin-walled steel specimen showed a good energy dissipation performance; Axial compression ratio has a greater influence on the ductility coefficient of specimen,when the axial compression ratio is 0. 2,the greater the section size,the ductility coefficient is larger,and when the axial compression ratio is 0. 4,the greater the section size,the ductility coefficient is smaller.