（1 浙江工业大学土木工程学院， 杭州 310014；2 浙江工业大学工程设计集团有限公司， 杭州 310014）

［摘要］针对门式刚架冷弯薄壁Z形檩条，提出通过附加缀板的加固方式提高Z形檩条的稳定性能及承载能力。然后利用ABAQUS软件建立了对于Z形檩条的单侧斜撑式缀板加固模型、双侧斜撑式缀板加固模型以及单侧L形缀板加固模型，并对其进行非线性屈曲分析，研究了不同加固间距情况下3种增设缀板加固方案对于4，6，7.5m长Z形檩条的稳定性能和强度性能的提升效果。计算结果表明，缀板加固方案适用于长度较大的檩条加固，且双侧加设缀板的加固方案较单侧加设缀板的加固方案更能有效提升Z形檩条的屈曲荷载以及承载能力。

［关键词］冷弯薄壁型钢；Z形檩条；缀板；加固措施；屈曲荷载

中图分类号：TU394文献标识码：A文章编号：1002-848X(2021)07-0078-07

Finite element analysis of reinforcement of cold-formed thin-walled Z-shaped purlin

ZHANG Kai1, CHEN Ruisheng2, SHI Tao1

（1 College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China;2 Zhejiang University of Technology Engineering Design Group Co., Ltd., Hangzhou 310014, China）

Abstract:Aiming at the cold-formed thin-walled Z-shaped purlins of the portal frame, a reinforcement method was put forward to improve the stability and bearing capacity of the Z-shaped purlin by adding batten plates. Then ABAQUS software was used to establish three models for Z-shaped purlins including unilaterally braced batten plate reinforcement model, bilaterally braced batten plate reinforcement model and unilateral L-shaped batten plate reinforcement model, and the nonlinear buckling analysis was carried on. The improvement effects of three additional batten plate reinforcement schemes on the stability and strength performance of 4m, 6m and 7.5m long Z-shaped purlins under different reinforcement spacing were studied. The calculation results show that the batten plate reinforcement scheme is suitable for the reinforcement of longer purlins, and the bilaterally braced batten plate reinforcement scheme can effectively improve the buckling load and bearing capacity of the Z-shaped purlin than the unilaterally braced batten plate reinforcement scheme.

Keywords:cold-formed thin-walled steel;Z-shaped purlin;batten plate;reinforcing measure;buckling load

作者简介：张楷，硕士研究生，Email: 530586089@qq.com；通信作者：陈瑞生，硕士，高级工程师，一级注册结构工程师，Email: ruisch@163.com。