(内蒙古科技大学土木工程学院, 包头 014010)

摘要: 冷弯型钢梁柱节点刚度对结构承载力影响较大,因此对冷弯型钢梁柱斜节点进行研究。 基于欧洲规范组件法计算冷弯型钢梁柱斜节点初始刚度,根据已有试验得到的梁柱斜节点变形特征和破坏模式分别进行理论和有限元分析,提出冷弯型钢梁柱斜节点的计算模型,推导节点初始刚度的理论计算公式。 结果表明:试验结果与理论计算结果的平均误差为 3. 6%,说明公式比较可靠。 此外,对冷弯型钢梁柱 L 形节点进行拓展分析,发现计算公式同样具有适用性。

关键词: 冷弯型钢; 梁柱斜节点; 组件法; 初始刚度

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)13-0094-05

DOI:10. 19701 / j. jzjg. 20201560

Research on initial stiffness of cold-formed steel beam-column oblique joint

CHEN Ming, REN Hao, GAO Peng, LI Bushuan

(College of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China)

Abstract: The stiffness of cold-formed steel beam-column oblique joint has a greater influence on the structural bearing capacity, so the cold-formed steel beam-column oblique joint was studied. The initial stiffness of the cold-formed steel beam-column oblique joint was calculated based on the Eurocode component method, and the theoretical and finite element analysis were carried out according to the deformation characteristics and failure modes obtained from the existing tests. The calculation model of the cold-formed steel beam-column oblique joint and the theoretical calculation formula of the joint initial stiffness was deduced. The results show that the average error between the experimental results and the theoretical calculation results is 3. 6%, indicating that the formula is relatively reliable. In addition, the cold-formed steel L-shaped joints were expanded and analyzed, and it is found that the calculation formula is also applicable.

Keywords:cold-formed steel; beam-column oblique joint; component method; initial stiffness

∗国家自然科学基金项目(51768055) 。第一作者:陈明,博士,教授,硕士生导师,主要从事钢结构研究,Email: cmlx-1978@ 163. com。通信作者:任昊,硕士,主要从事钢结构研究,Email: 709472072@ qq. com。