摘要
Abstract
To mitigate the gripping failure and crushing of Glass Fiber-Reinforced Polymer(GFRP)bars at the ends during tensile tests,caused by stress concentration,this study employed a steel sleeve grouting anchorage technique.Three GFRP bar specimens were treated with this method and subjected to monotonic tensile tests,with one untreated GFRP bar serving as a control.The results demonstrated that the steel sleeve grouting anchorage effectively distributed the gripping stresses,shifting the failure mode from crushing at the grips to tensile fracture in the mid-length of the bar.The ultimate tensile strength of the anchored specimens ranged from 755 to 760 MPa,which more accurately reflects the true material properties of the GFRP bars.The load-displacement curves of the GFRP bars exhibited linear behavior up to failure without a distinct plastic deformation stage,indicating typical brittle characteristics.The elastic modulus remained stable within a range of 45.7 to 46.2 GPa.This research validates the effectiveness of the steel sleeve grouting anchorage technique for tensile testing of GFRP bars,providing an experimental basis for their anchorage design and performance evaluation in engineering applications.关键词
GFRP筋/钢套筒灌浆/锚固性能/单向拉伸/荷载-位移曲线Key words
GFRP bars/Steel sleeve grouting/Anchorage performance/Uniaxial tension/Load-displacement curve分类
建筑与水利
