内置钢骨GFRP管混凝土中长柱偏压承载力分析  

Analysis of bearing capacity of steel-encased concrete filled GFRP tubes middle-long column subjected to eccentric compression load

作　　者：张海霞[1] 刘鹤[1] 孙云杰[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《合肥工业大学学报（自然科学版）》2017年第7期965-970,共6页Journal of Hefei University of Technology：Natural Science

基　　金：辽宁省自然科学基金资助项目(20170540750);辽宁省高等学校优秀科技人才支持计划资助项目(LR2015055);沈阳建筑大学学科涵育计划资助项目(XKHY2-15)

摘　　要：为了提出内置钢骨玻璃纤维增强复合材料(glass fiber reinforced polymer,GFRP)管混凝土中长柱的偏压承载力计算方法,文章通过对7根内置钢骨GFRP管混凝土中长柱进行偏压试验,分析了长细比、偏心距、混凝土强度对组合柱偏压性能的影响,建立了考虑偏心距影响的承载力折减系数计算公式。利用ABAQUS有限元分析软件,对组合柱轴压性能进行数值模拟,在验证有限元分析结果正确的基础上,确定了短柱与中长柱长细比的界限值以及组合柱弹性失稳长细比的界限值,推导了考虑长细比影响的承载力折减系数计算公式,建立了组合柱偏压承载力实用计算公式,并将理论值与试验值进行了对比。结果表明,组合柱的偏压承载力随着长细比和偏心距的增大而减小,建立的偏压承载力计算公式理论值与试验值吻合良好。The experiment of seven steel-encased concrete filled glass fiber reinforced polymer（GFRP） tubes column subjected to eccentric compression load is presented to explore the computation method of the composite column. The effect of slenderness ratio, eccentricity and strength of concrete on the behavior of the composite under eccentric compression is analyzed. The calculating formula of reduc- tion coefficient of bearing capacity considering the influence of eccentricity is established. The numeri- cal simulation on the composite column under axial compression is conducted through the finite ele- ment analysis software ABAQUS. Based on the verified validity of simulation results against experi- mental results, the boundary values of the short column to middle-long column and the slenderness ra- tio under elastic buckling of the composite column are determined, and the calculating formula of re- duction coefficient of bearing capacity considering the influence of slenderness ratio is deduced. Fur- thermore, the practical calculation formula of the bearing capacity of the composite column subjected to the eccentric compression load is established, whose values are compared with the test results. The results indicate that the bearing capacity of the composite column decreases with the increase of eccen- tricity and slenderness ratio. The theoretical results from the calculation formula have a good agree- ment with test results.

关 键 词：内置钢骨 GFRP管混凝土 中长柱 长细比和偏心距影响 偏压承载力 

分 类 号：TU398.9[建筑科学—结构工程]