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(1 中國建筑西南設計研究院有限公司, 成都 610041; 2 浙江大學高性能結構研究所, 杭州 310058)
摘要: 根據《鋼結構與鋼-混凝土組合結構設計方法》,詳細介紹了人字支撐、交叉支撐以及框架-支撐結構在不同層間側移角、不同支撐長細比下的抗側力性能. 介紹了我國《鋼結構設計標準》(GB 50017—2017)關于受壓支撐剩余承載力系數、豎向不平衡力折減系數的確定依據. 闡述了框架-支撐結構中框架抗側承載力不小于 25%的原因.最后介紹了《鋼結構設計標準》(GB 50017—2017)關于支撐系統中弱支撐強框架設計理念的實現方法,并對人字支撐系統中橫梁的軸力計算公式提出了改進建議.
關鍵詞: 鋼支撐; 框架-支撐結構; 二道防線; 抗側承載力; 豎向不平衡力
中圖分類號:TU391 文獻標志碼:A 文章編號: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
∗中國建筑西南設計研究院有限公司重點課題(R-2021-08-S-A-2023),浙江省建設科研項目(2021K091).
第一作者:周佳,碩士,高級工程師,一級注冊結構工程師,主要從事鋼結構、組合結構和復雜結構的設計研究,Email:83294306@ qq. com.
[引用本文] 周佳,童根樹,李常虹,等. 《鋼結構與鋼-混凝土組合結構設計方法》的理解與應用———鋼支撐[J]. 建筑結構,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.
