中国塑料2025，Vol.39Issue(7)：56-62,7.DOI:10.19491/j.issn.1001-9278.2025.07.010
高温对GFRP管混凝土柱轴压性能影响研究
Effect of elevated temperatures on axial compressive performance of concrete-filled GFRP tube columns
摘要
Abstract
This study examined the effects of elevated temperatures(20-220℃)on the axial compressive behavior of con-crete-filled glass fiber reinforced polymer(GFRP)tubular columns.Experimental investigations were conducted on GFRP tubes,concrete cubes,and composite columns with two different specifications,subjected to heating durations of 2 and 4 hours.The study evaluated circumferential tensile properties of GFRP tubes,compressive strength of concrete,and their combined influence on column performance.Results indicated that at ambient temperature,GFRP confinement enhanced the ultimate bearing capacity of concrete columns by 4.75 times compared to unconfined specimens.However,elevated temperatures significantly degraded the mechanical compatibility between GFRP tubes and concrete,leading to progressive reductions in both ultimate bearing capacity and strain.At 220℃,the bearing capacity decreased by 18.73%(2-hour exposure)and 20.21%(4-hour exposure).Temperature elevation proved more detrimental to axial performance than exposure duration,highlighting the importance of thermal considerations in GFRP-confined concrete column design.关键词
玻璃纤维增强聚合物管混凝土柱/高温/轴压性能/极限承载力/约束作用Key words
concrete-filled GFRP tube column/elevated temperature/axial compressive performance/ultimate compressive capacity/confinement effect分类
化学化工引用本文复制引用
高永红,何家乐,金清平..高温对GFRP管混凝土柱轴压性能影响研究[J].中国塑料,2025,39(7):56-62,7.基金项目
湖北省建设厅科研资助项目(厅头[2022]2198号-67) （厅头[2022]2198号-67）
湖北省高等学校优秀中青年科技创新团队计划项目(T2022002) （T2022002）
