建筑钢结构进展2018，Vol.20Issue(2)：103-109,7.DOI:10.13969/j.cnki.cn31-1893.2018.02.014
椭圆钢管混凝土长柱偏压受力性能研究
Study on the Eccentrically Compressive Behavior of Elliptical Concrete-Filled Steel Tubular Slender Columns
摘要
Abstract
This paper focuses on the eccentrically compressive behavior of elliptical concrete-filled steel tubular (ECFST) slender columns.A numerical analysis model of ECFST columns under eccentric load is built using ABAQUS.The complex interaction between elliptical steel tube and core concrete,the material nonlinearity and cross-section feature are accounted in the FE model.The accuracy of numerical model is verified through comparing with previous test data.Moreover,the influence of steel strength,concrete strength,load eccentricity,diameter-to-thickness ratio,cross section slenderness and cross-section area are analyzed.The effects of various parameters on the maximum eccentric compressive capacity of the ECFST slender columns under eccentric loading are evaluated.The failure modes and stress distribution of ECFST slender columns are revealed.The results show that the failure modes of the ECFST slender columns under eccentric compression can be divided into large and small eccentric failure for different load eccentricities.According to different loading paths,it fails along long axis or short axis,respectively.The eccentrically compressive capacity of the ECFST slender columns increases with the increase of concrete strength,steel strength and cross section area,while it decreases with the increase of load eccentricity,diameter-to-thickness ratio,cross-section slenderness and slenderness ratio.This paper provides a reference for the design of ECFST members.关键词
椭圆钢管混凝土长柱/偏压性能/破坏模式Key words
ECFST slender column/eccentrically compressive behavior/failure mode分类
建筑与水利引用本文复制引用
於忠华,王静峰,沈奇罕..椭圆钢管混凝土长柱偏压受力性能研究[J].建筑钢结构进展,2018,20(2):103-109,7.基金项目
国家自然科学基金(51478158),教育部新世纪人才支持计划(NCET-12-0838) （51478158）
