冷弯薄壁型钢节点静力性能研究

Study on Static Performances of Cold-formed Thin-wall Steel Joints

为了研究节点的静力性能,本文采用试验和有限元分析相结合的方法,对一组自攻螺钉连接冷弯薄壁型钢节点进行了研究,并且对其破坏模式、"群效应"、"弯矩-转角"关系等方面进行了分析.结果表明,该类节点属于半刚性节点,其常见破坏模式为孔壁挤压破坏和螺钉剪切破坏;当栓距不小于螺栓直径的3倍时,可以忽略"群效应".

To learn the static performances of the joints study was done on a group of joints with tapping screw based on experiments and finite element analysis. The destructive mode,group effect and the bending moment-rotation relationships had been analyzed. The results showed that this kind of joints was semi-rigid joint,the destructive modes were squeezing hole wall and shearing screw,group effect could be ignored when the distance between screws was not less than three times the screw diameter.