土木与环境工程学报（中英文）2025，Vol.47Issue(3)：151-161,11.DOI:10.11835/j.issn.2096-6717.2023.059
FRP加固混凝土梁界面应力的时变规律研究
Study on time-dependent interfacial stress of FRP-strengthened RC beam
摘要
Abstract
Based on the massive applications of FRP-reinforced structure technology,the time-varying patterns of interfacial stresses of FRP-strengthened RC beams under sustained load are investigated in this study.A finite element(FE)model was developed to analyze the external FRP strains,and the correctness and usability of the FE method were verified by comparing the predicted results with the test results.For the FRP end area,both the FE method and the analytical method were applied to conduct investigations considering the spew fillet of adhesive and the secondary loading of the reinforced structures.For the area near the intermediate concrete crack,the analytical method was used to conduct calculations.The results show that the concrete creep leads to the increase of interfacial stresses with time,and the adhesive creep leads to the relief of stresses.This conclusion is applicable to both areas mentioned above and is not affected by the spew fillet of the adhesive and the secondary loading of the reinforced structures.In the FRP end region,the FE results and analytical results are in good agreement.关键词
FRP加固混凝土结构/长期荷载/材料蠕变/界面应力/胶层溢出/二次受力Key words
FRP-strengthened RC structures/long-term loading/material creep/interfacial stress/spew fillet of adhesive/secondary loading分类
建筑与水利引用本文复制引用
孙涛,姚未来,刘元雪,穆锐,任俊儒,成鑫磊,雷屹欣,严仁章..FRP加固混凝土梁界面应力的时变规律研究[J].土木与环境工程学报（中英文）,2025,47(3):151-161,11.基金项目
重庆市自然科学基金(CSTB2022NSCQ-MSX0194) （CSTB2022NSCQ-MSX0194）
重庆市博士直通车项目(CSTB2022BSXM-JSX0023) Natural Science Foundation of Chongqing(No.CSTB2022NSCQ-MSX0194) （CSTB2022BSXM-JSX0023）
Doctoral Project of Chongqing Science and Technology Bureau(No.CSTB2022BSXM-JSX0023) （No.CSTB2022BSXM-JSX0023）
