湖南大学学报（自然科学版）2018，Vol.45Issue(3)：29-38,10.DOI:10.16339/j.cnki.hdxbzkb.2018.03.004
钢套管再生混凝土加固钢筋混凝土柱偏压性能
Behavior of Steel-j acket Retrofitted Column with Recycled Aggregate Concrete under Eccentric Loading
摘要
Abstract
In order to achieve the goal of green building,the idea of steel-jacket retrofitted RC columns with recycled aggregate concrete was proposed.Tests of 1 original column,3 retrofitted columns under ax-ial compressive loading and 8 retrofitted columns under eccentric loading were conducted.It is found that after retrofitted by steel-jacket and recycled aggregate concrete,the bearing capacity and deformation per-formance of the RC column are significantly improved,where the relative bearing capacity is increased by 1.1 2 times on the average.The effect of recycled coarse aggregate replacement ratio on eccentric bearing capacity is not obvious,while the mid-span strain of steel-jacket increases slightly when the replacement ratio grows under large eccentricity.The peak loads of the retrofitted column with preload appear earlier, which shows a negative effect on deformation performance.Besides,the influence of the eccentricity is similar to that of the concrete-filled steel tubular column:as the eccentricity increases,the bearing capacity decreases and the compression-side strain of steel-jacket increases,and this trend becomes stronger when the replacement ratio increases.Finally,according to the comparison of design codes and the researches, eccentric bearing capacity calculated by EC4 is most consistent with the test results for this kind of retrofit-ted columns.关键词
钢套管/再生混凝土/加固/偏压试验Key words
steel jacket/recycled aggregate concrete/strengthening/eccentric compression test分类
建筑与水利引用本文复制引用
陈庆军,黎哲,蒙何彬,蔡健,何岸,左志亮,潘忠尧..钢套管再生混凝土加固钢筋混凝土柱偏压性能[J].湖南大学学报（自然科学版）,2018,45(3):29-38,10.基金项目
国家自然科学基金青年科学基金资助项目(51408230),National Natural Science Foundation of China(51408230) （51408230）
华南理工大学亚热带建筑科学国家重点实验室自主研究课题资助项目(2015ZC18),State Key Lab of Subtropical Building Science,South China University of Technology(2015ZC18) （2015ZC18）
