(1 中国建筑西南设计研究院有限公司, 成都 610041; 2 浙江大学高性能结构研究所, 杭州 310058)

摘要: 根据《钢结构与钢-混凝土组合结构设计方法》,详细介绍了人字支撑、交叉支撑以及框架-支撑结构在不同层间侧移角、不同支撑长细比下的抗侧力性能. 介绍了我国《钢结构设计标准》(GB 50017—2017)关于受压支撑剩余承载力系数、竖向不平衡力折减系数的确定依据. 阐述了框架-支撑结构中框架抗侧承载力不小于 25%的原因.最后介绍了《钢结构设计标准》(GB 50017—2017)关于支撑系统中弱支撑强框架设计理念的实现方法,并对人字支撑系统中横梁的轴力计算公式提出了改进建议.

关键词: 钢支撑; 框架-支撑结构; 二道防线; 抗侧承载力; 竖向不平衡力

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)21-0144-07

DOI:10.19701 / j.jzjg.LZ2202

Understanding and application of the design method for steel structures and steel-concrete combined structures—steel brace

ZHOU Jia1, TONG Genshu2, LI Changhong1, LIU Yifeng1, ZHANG Lei2, PAN Yu1

(1 China Southwest Architectural Design & Research Institute Co. , Ltd., Chengdu 610041, China; 2 Instituteof High-Performace Structures, Zhejiang University, Hangzhou 310058, China)

Abstract: According to the design method for steel structures and steel-concrete combined structures, the lateral forceresistance performance of chevron brace, cross brace and frame-braced structure under different story drift angel anddifferent bracing slenderness were introduced in detail. The bases for determining the residual bearing capacity coefficient ofcompressive brace and the reduction coefficient of vertical unbalanced force using the standard for design of steel structures(GB 50017—2017) were introduced. The reasons why the frame lateral bearing capacity should not be less than 25% inthe frame-braced structure were elaborated. Finally, the realization method of the standard for design of steel structures (GB50017—2017) on the design conception of weak bracing and strong frame in the bracing system were introduced, andimprovement suggestions were made for the calculation formula of crossbeam axial force in the chevron bracing system.

Keywords:steel brace; frame-braced structure; dual defense system; lateral bearing capacity;vertical unbalanced force

∗中国建筑西南设计研究院有限公司重点课题(R-2021-08-S-A-2023),浙江省建设科研项目(2021K091).

第一作者:周佳,硕士,高级工程师,一级注册结构工程师,主要从事钢结构、组合结构和复杂结构的设计研究,Email:83294306@ qq. com.

[引用本文] 周佳,童根树,李常虹,等. 《钢结构与钢-混凝土组合结构设计方法》的理解与应用———钢支撑[J]. 建筑结构,2022,52(21):144-150. ZHOU Jia,TONG Genshu,LI Changhong,et al. Understanding and application of thedesign method for steel structures and steel-concrete combined structures—steel brace[J]. Building Structure,2022,52(21):144-150.