(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;3 浙江工业大学土木工程学院, 杭州 310014)

摘要: 钢结构的稳定问题普遍存在于钢结构设计中,凡是钢结构的受压部位,在设计时都必须认真考虑其稳定性。 根据《钢结构与钢-混凝土组合结构设计方法》,详细介绍了钢结构稳定验算的实质和注意事项,并结合钢结构稳定验算的实质,探讨了抗震构件和非抗震构件的容许长细比,给出了不同剩余抗弯能力比下的框架柱轴压比和长细比限值以及非抗震构件的容许长细比建议。 最后介绍了《钢结构设计标准》 (GB 50017—2017)关于钢支撑容许长细比的规定依据。

关键词: 钢结构; 稳定性; 容许长细比; 支撑; 框架柱

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)24-0144-04

DOI:10. 19701 / j. jzjg. LZ2203

Understanding and application of Design method for steel strutures and steel-concrete combined structures:stability and slenderness ratio

ZHOU Jia1, TONG Genshu2, LI Changhong1, LIU Yifeng1, CHEN Di1, ZHAO Qin3

(1 China Southwest Architectural Design & Research Institute Corp. , Ltd. , Chengdu 610041, China; 2 Instituteof High-Performace Structures, Zhejiang University, Hangzhou 310058, China; 3 College of Civil Engineering,Zhejiang University of Technology, Hangzhou 310014, China)

Abstract:Steel structural stability issues are prevalent in the design of steel structures. For any compression part of thesteel structure, its stability must be carefully considered in the design. According to the Design method for steel structuresand steel-concrete combined structures, the essence and matters needing attention in the stability verifying of steel structurewere introduced in detail, combined with the essence of steel structure stability verifying, the allowable slenderness ratio ofseismic components and non-seismic components were investigated, suggestions were made for axial compression ratio limitand slenderness ratio limit of frame column under different residual bending capacity ratio and allowable slenderness ratio ofnon-seismic components. Finally, the basis for the allowable slenderness ratio of steel bracing in Standards for design ofsteel structures (GB 50017—2017)was introduced.

Keywords:steel structure; stability; allowable slenderness ratio; bracing; frame column

∗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———稳定和长细比[J]. 建筑结构, 2022, 52 ( 24): 144-147, 143. ZHOU Jia, TONG Genshu, LI Changhong, et al. Understanding andapplication of design method for steel strutures and steel-concrete combined structures:stability and slenderness ratio [ J].Building Structure,2022,52(24):144-147,143.