摘要
国内外大量研究结果表明,能够实现梁端塑性铰外移的狗骨式连接具有良好的塑性变形能力。但由于其翼缘局部削弱使得梁的抗弯刚度退化,因此狗骨钢梁的局部屈曲和侧向失稳问题值得关注。采用拟静力试验方法,研究了狗骨钢梁局部屈曲对其节点性能产生的影响,并尝试通过在削弱部位设置加劲肋的方法约束削弱处的局部变形。研究结果表明:在梁翼缘削弱区通过合理设置加劲肋,可以延迟局部屈曲的出现,改善强度和刚度的退化问题,节点承载能力和塑性变形能力均可得到明显提高。
Domestic and international research results show that dogbone connections are capable of keeping plastic hinge regions away from beam ends and have good plastic deformation capacity.However,the beam flange is weakened in the dogbone connection,and then the beam bending stiffness deteriorates,so the local buckling and lateral buckling issues raise more concern.This paper used the pseudo-static experimental method,investigated the effect of the local buckling on the moment connection performance,and attempted to use a method of arranging stiffeners in order to restrict the local deformation of the weakened area.The results show that if the stiffeners are arranged reasonably in the region of weakened flange,the appearance of local buckling can be delayed,the strength and stiffness deterioration can be improved,and the carrying capacity and plastic deformation capacity of the connections can be increased.
出处
《建筑钢结构进展》
北大核心
2013年第2期6-10,38,共6页
Progress in Steel Building Structures
关键词
狗骨式连接
局部屈曲
节点性能
加劲肋
dogbone connection
local buckling
connection performance
stiffener
