GFRP筋材与钢筋锚杆拉拔力学特性对比研究
Comparative Study on Drawing Characteristics of GFRP Reinforcement and Reinforcement
孙乐光1
作者信息
- 1. 中铁十四局集团青岛工程有限公司,山东 青岛 266000
- 折叠
摘要
文中通过GFRP锚杆拉拔试验和数值模拟,研究了GFRP和钢筋锚杆的抗拔力学特性,对比分析两者应力-应变曲线特性、破坏过程、锚固特性.结果表明,GFRP筋应力-应变曲线与钢筋完全不同,达到破坏荷载时,GFRP锚杆应变显著小于钢筋应变.GFRP筋的破坏为脆性破坏,而钢筋为弹塑性破坏.两者的锚固拉拔特性差异明显,GFRP锚杆的轴应力传递深度大于钢筋,GFRP锚杆的剪应力分布更为均匀.研究结果可为其在实际工程中的应用和稳定性分析提供借鉴.
Abstract
In this paper,the mechanical characteristics of pullout resistance of GFRP and steel anchors are investigated by pullout test and nu-merical simulation of GFRP anchors.The stress-strain curve characteristics,damage process,and anchorage characteristics of both are ana-lyzed comparatively.The results show that the stress-strain curves of GFRP bars are completely different from those of steel bars,and the strain of GFRP anchors is significantly smaller than that of steel bars when reaching the destructive load.The damage of GFRP bars is brittle,while that of steel bars is elastic-plastic.The difference in anchorage pullout characteristics between the two is obvious,the axial stress transfer depth of GFRP anchors is greater than that of steel bars,and the shear stress distribution of GFRP anchors is more uniform.The results of the study can provide a reference for its application and stability analysis in practical engineering.
关键词
GFRP锚杆与钢筋锚杆/拉拔试验/破坏过程/锚固拉拔性能Key words
GFRP anchor and reinforced anchor/Pull out test/Failure process/Anchorage pullout performance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据