(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》,详细介绍了钢柱脚的轴力传力机制以及外包式钢柱脚的弯矩传力机制. 对于外包式钢柱脚,指出规范关于外包混凝土最小高度要求的实质,提出了钢柱传递至外包混凝土的轴力、界面抗剪、外包混凝土的抗冲切等计算公式,并对《高层民用建筑钢结构技术规程》 ( JGJ 99—2015)关于外包式钢柱脚极限受剪承载力的计算公式提出了改进建议. 现行规范关于钢柱下混凝土的局部受压计算,偏不安全,提出了基于壁板以及钢柱整体的混凝土局部受压计算方法.

关键词: 钢柱脚; 传力机制; 外包高度; 界面抗剪; 局部受压

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2023)05-0148-04

DOI:10. 19701 / j. jzjg. LZ2204

Understanding and application of Design method for steel structures and steel-concrete combined structures———steel column base

ZHOU Jia1, TONG Genshu2, LI Changhong1, LIU Yifeng1, FEI Shaofeng1, WANG Mingyi1

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

Abstract:According to Design method for steel structures and steel-concrete combined structures, the axial force transmissionmechanism of the steel column base and the bending momentum transmission mechanism of the outsourced steel columnbase were introduced in detail. For the outsourced steel column base, the essence of the minimum height requirements ofoutsourced concrete was pointed out, and the computing formulas such as the axial force transmitted from steel column tooutsourced concrete, interface shear resistance and punching resistance of outsourced concrete were proposed. Somesuggestions were put forward to improve the calculation formula of ultimate shear capacity of outsourced steel column base inTechnical specification for steel structures of high rise civil buildings(JGJ 99—2015). The current specification on the localcompression calculation of concrete under steel columns is not very safe, the calculation methods for local compression ofconcrete based on panel and steel column as a whole was proposed.

Keywords:steel column base; force transfer mechanism; outsourced height; interfacial shear resistance; local compression

∗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———钢柱脚[J]. 建筑结构,2023,53(5):148-151,126. ZHOU Jia,TONG Genshu,LI Changhong,et al. Understanding and application ofDesign method for steel structures and steel-concrete combined structures———steel column base [ J]. Building Structure,2023,53(5):148-151,126.