摘要
对现存门式刚架中出现的螺栓预紧力施加不足的梁柱端板连接节点进行了节点性能的研究。通过节点单向加载试验验证数值模拟方法的有效性,再对各研究节点分别在施加及未施加螺栓预紧力下的节点进行有限元模拟分析。结果表明螺栓未施加预紧力时节点极限承载弯矩变化不大但初始转动刚度有一定程度的削弱。
The joint behaviors of beam-column endplate connections without enough bolt pretensions in existing portal frames were investigated.The validity of numerical simulation was verified by monotonic loading experiments for beam-column joints.Then finite elements analyses were simulated for the investigated joints with or without enough bolt pretensions respectively.The results show that the ultimate moment resistances of the joints without enough bolt pretensions change little but the joint initial rotational stiffness will be weakened in a certain extend.
出处
《福建建设科技》
2012年第2期12-14,36,共4页
Fujian Construction Science & Technology
关键词
门式刚架
螺栓预紧力
节点转动刚度
Portal Frame
Bolt Pretension
Joint Rotational Stiffness
