华中科技大学学报（自然科学版）2024，Vol.52Issue(10)：7-12,6.DOI:10.13245/j.hust.240375
FRPG-ECC复合加固钢筋混凝土柱轴压性能研究
Study on axial compression behavior of reinforced concrete columns strengthened by FRPG-ECC
摘要
Abstract
Four fiber reinforced polymers grid-engineering cementitious composites(FRPG-ECC)strengthened reinforced concrete(RC)columns and two RC columns were tested under axial compression.The effects of FRP grid layer and stirrup spacing on the failure mode,load carrying capacity and deformation ability were studied.Experiment results show that the FRPG-ECC layer can effectively alleviate the brittle failure of RC columns,FRP grid gradually ruptures during the post-peak stage,and the strengthened column can maintain its integrity.The FRPG-ECC layer can effectively improve the load carrying capacity and deformation ability of RC columns.Compared with the un-strengthened columns,the load carrying capacity,axial shortening at ultimate load and axial shortening at failure load of the strengthened columns are enhanced by 5.1%～18.1%,104.5%～221.9%and 152.0%～302.8%,respectively.A strength model for the concrete confined by FRPG-ECC layer was developed by introducing the confining stiffness and concrete strength,and then a predictive formula for the load carrying capacity of strengthened RC columns was proposed.The predictions are in good agreement with the test results.关键词
纤维增强复合材料网格/工程用水泥基复合材料/加固/混凝土柱/承载力/变形能力Key words
fiber reinforced polymers grid(FRPG)/engineering cementitious composites(ECC)/strengthening/concrete column/load carrying capacity/deformation ability分类
建筑与水利引用本文复制引用
李娜,夏永阳,李旺鹏,李杉..FRPG-ECC复合加固钢筋混凝土柱轴压性能研究[J].华中科技大学学报（自然科学版）,2024,52(10):7-12,6.基金项目
国家自然科学基金青年基金资助项目(52008321). （52008321）
