复合材料科学与工程Issue(6)：1-9,117,10.DOI:10.19936/j.cnki.2096-8000.20250628.001
GFRP管螺旋筋复合约束混凝土柱轴压性能试验研究
Experimental investigation on the axial compressive behavior of GFRP-pipe-encased concrete columns with spiral reinforcement
摘要
Abstract
This study aims to the axial compression performance of GFRP pipe spiral reinforcement composite confined concrete columns.A total of 29 specimens were fabricated and subjected to axial compression tests,with variations in concrete strength,yield strength of spiral reinforcement,stirrup ratio of spiral reinforcement,and longi-tudinal reinforcement ratio as parameters.The failure process of the specimens was observed,and the failure modes of different specimens were summarized.The load-displacement and load-strain curves were obtained.The influence of various parameters on the axial compression performance of specimens was investigated.The test results indicate that specimens fail due to the fracture of the GFRP tube,the crushing of the core concrete,or the breakage of the spiral reinforcement.Ultimate load-bearing capacity of GFRP tube spiral reinforced concrete columns increases with rising concrete strength,while their deformability diminishes.With increasing yield strength and stirrup ratio of spi-ral reinforcement,both the ultimate load-bearing capacity and shape-shifting capability of GFRP-pipe spiral rein-forced concrete columns enhance.The longitudinal reinforcement ratio has minimal influence on these columns.GFRP pipe can enhance the axial compression peak stress of reinforced concrete columns by over 30％,and in-crease the ductility coefficient by over 90％.The addition of spiral reinforcement can increase the axial compressive peak stress of GFRP-pipe concrete columns by over 10％,and enhance its ductility by over 20％.Finally,a formu-la for calculating the axial compression bearing capacity of GFRP-pipe spiral reinforced composite confined concrete columns is proposed,and the calculated results closely align with the experimental findings.关键词
GFRP管/螺旋筋/约束混凝土/高强钢丝/承载力Key words
GFRP tube/spiral reinforcement/confined concrete/high strength steel wire/bearing capacity分类
通用工业技术引用本文复制引用
经承贵,武彤,赵林,陈宗平..GFRP管螺旋筋复合约束混凝土柱轴压性能试验研究[J].复合材料科学与工程,2025,(6):1-9,117,10.基金项目
广西科技基地和人才专项(AD19245131) （AD19245131）
广西自然科学基金(2019GXNSFBA245071) （2019GXNSFBA245071）
广西科技大学博士基金项目(校科博19z41) （校科博19z41）
国家自然科学基金项目(51578163) （51578163）
广西高校防灾减灾与预应力技术重点实验室资助课题(GXKDTJ017) （GXKDTJ017）
