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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(jù)《鋼結構與鋼-混凝土組合結構設計方法》,詳細介紹了鋼柱腳的軸力傳力機制以及外包式鋼柱腳的彎矩傳力機制. 對于外包式鋼柱腳,指出規(guī)范關于外包混凝土最小高度要求的實質,提出了鋼柱傳遞至外包混凝土的軸力、界面抗剪、外包混凝土的抗沖切等計算公式,并對《高層民用建筑鋼結構技術規(guī)程》 ( JGJ 99—2015)關于外包式鋼柱腳極限受剪承載力的計算公式提出了改進建議. 現(xiàn)行規(guī)范關于鋼柱下混凝土的局部受壓計算,偏不安全,提出了基于壁板以及鋼柱整體的混凝土局部受壓計算方法.
關鍵詞: 鋼柱腳; 傳力機制; 外包高度; 界面抗剪; 局部受壓
中圖分類號:TU391 文獻標志碼:A 文章編號: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———鋼柱腳[J]. 建筑結構,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.
