中南大学学报（自然科学版）2017，Vol.48Issue(6)：1635-1644,10.DOI:10.11817/j.issn.1672-7207.2017.06.030
HPFL-黏钢联合加固混凝土方柱早龄期轴压性能
Early axial compression performance of square columns strengthened with HPFL and bonded steel plates
摘要
Abstract
Axial compressive tests were conducted to investigate the early load-carrying capacity of the square concrete columns strengthened with high performance ferrocement laminate (HPFL) and bonded steel plates.The failure mechanism of the strengthened plain concrete columns and the strengthened RC columns were analyzed.Based on experimental analysis of the RC strengthened square columns,the formulae of the axial compression bearing capacity were proposed.The results show that the reinforcing layer works together with the original columns as a whole.Under the constraint effect of the reinforcing layer,the core concrete of the strengthened columns is in triaxial compressive stressed condition,and the load-carrying capacity increases obviously at the early-age,and deformation capacity is also improved.When the strengthened RC columns were in failure,the main damage zones came into being along the longitudinal bolts,and the mortar and concrete were crushed and bulged outward in the middle of the columns.In addition,the angle bars and the longitudinal steel bars buckled,and the steel wires were cut off at the corner of the angle bars,and some stirrups ruptured.When the strengthened plain concrete columns were in failure,the diagonal shear cracks came into being in the middle of the columns.Because of the limited chamfer size of angle bars,the steel wires were cut off earlier.Enlarging the chamfer size of angle bars or bonding steel plates after chamfering the original columns,the post-peak ductility would be improved.关键词
HPFL-黏钢联合加固/混凝土柱/早龄期/轴压性能/承载力Key words
strengthening with HPFL and bonded steel plates/concrete columns/early-age/axial compression performance/load-carrying capacity分类
建筑与水利引用本文复制引用
黄华,刘伯权,史金辉,张峰,卢永刚..HPFL-黏钢联合加固混凝土方柱早龄期轴压性能[J].中南大学学报（自然科学版）,2017,48(6):1635-1644,10.基金项目
国家自然科学基金资助项目(51308065) （51308065）
中国博士后科学基金资助项目(2012M511956,2014T70896) （2012M511956,2014T70896）
中央高校基本科研业务费专项资金资助项目(310828173401) （310828173401）
陕西省自然科学基础研究计划项目(2016JM5050)(Project(51308065) supported by the National Natural Science Foundation of China （2016JM5050）
Projects(2012M511956,2014T70896) supported by the China Postdoctoral Science Foundation （2012M511956,2014T70896）
Project(310828173401) supported by the Fundamental Research Funds for the Central University （310828173401）
Project(2016JM5050) supported by the Natural Science Foundation of Shanxi Province) （2016JM5050）
