华东交通大学学报2024，Vol.41Issue(3)：37-44,8.
CFRP布抗剪加固预加载RC梁的力学性能研究
Study on the Mechanical Properties of Preloaded RC Beams Shear-Strengthened with CFRP Sheets
摘要
Abstract
[Objective]The shear tests of four rectangular reinforced concrete(RC)beams were conducted to in-vestigate the effects of the end-anchorage method and preloading on the shear behavior of the carbon fiber rein-forced polymer(CFRP)-strengthened RC beams.[Method]The failure mode,load-deflection curve,characteris-tic load,strain developments of the stirrup and CFRP were analyzed.Finally,the shear capacity of the specimens was predicted using the existing calculation methods for the shear capacity of the CFRP-strengthened RC beam.[Result]The test results show that the using U-shaped CFRP strengthening can significantly enhance the shear behavior of RC beams under the reliable end-anchorage.The shear strengthening effect is significantly affected by the end-anchorage methods.The mechanical anchorage is obviously superior to the CFRP sheet anchorage.Compared with the unstrengthened beam,the shear capacity of the strengthened beam with the mechanical an-chorage increases by about 60%,whereas that with the CFRP sheet anchorage only increases by 9.8%.The pre-loading significantly decreases the cracking load of the strengthened beams,but does not affect the shear capaci-ty.[Conclusion]The research results can provide reference for the engineering application of shear strengthen-ing of RC beams with CFRP sheets.关键词
CFRP布/抗剪加固/锚固方法/预加载/钢筋混凝土梁Key words
CFRP sheet/shear strengthening/anchorage method/preloading/reinforced concrete beam分类
建筑与水利引用本文复制引用
黄志刚,林俊,黄卫国,王海涛,吴琼..CFRP布抗剪加固预加载RC梁的力学性能研究[J].华东交通大学学报,2024,41(3):37-44,8.基金项目
江西省交通运输厅科技项目(2022H0020) （2022H0020）
