以水压试验分析纤维缠绕角度对GFRP管力学性能的影响
The Influence of Fiber Winding Angle on the Mechanical Properties of GFRP Tubes was Analyzed by Hydrostatic Test
周龙华 1邹毅 1杨森 1彭旭 1黄奕森 1黄旖珩 1谢攀1
作者信息
- 1. 华南农业大学水利与土木工程学院,广东 广州 510642
- 折叠
摘要
基于海洋环境中长期受压的钢筋混凝土桥梁墩柱易发生开裂和锈蚀的特点,工程中越来越多地应用纤维增强复合材料(FRP)对桥梁墩柱进行加固处理.实践表明FRP纤维缠绕角度的大小对其能起到的加固效果存在一定的差异.为更好地探究纤维缠绕角度与力学性能的关系,对45°、60°和80°三组不同缠绕角度的玻璃纤维复合材料(GFRP)圆管进行水压加载试验,通过收集应力-应变数据计算不同角度下GFRP圆管的环向弹性模量.结果表明:随着纤维缠绕角度的增大,GFRP管的环向弹性模量由8.85 GPa提高到38.16 GPa,对钢筋混凝土墩柱的加固效果更好.
Abstract
Based on the long-term compression to reinforced concrete bridge piers,which are prone to cracking and rust in the marine environment,fiber reinforced composites(FRP)are increasingly used to reinforce bridge piers and columns.Practice has shown that the size of the FRP fiber winding angle has a certain difference in the reinforcement effect that it plays.In order to better explore the rela-tionship between fiber winding angle and mechanical properties,experiment performs water pressure loading on three sets of glass fiber composite(GFRP)cylinders with different winding angles of 45°,60° and 80°,and calculates the modulus of annular elasticity of GFRP cylinders at different angles by collecting stress-strain data.The results show that with the increase of the fiber winding angle,the modulus of annular elasticity of the GFRP pipe was increased from 8.85 GPa to 38.16 GPa,and the reinforcement effect of the re-inforced concrete pier column is better.
关键词
水压试验/纤维缠绕角/GFRP管Key words
hydrostatic test/fiber winding angle/GFRP tube引用本文复制引用
基金项目
广州市科技创新发展专项(基础与应用基础研究)(202102080315)
国家自然科学基金面上项目(51778246)
出版年
2024
NETL
NSTL
维普
万方数据