摘要
本文介绍了8根GFRP布、1根CFRP布加固混凝土梁以及1根未加固对比梁的受剪试验,研究了FRP布受剪加固形式、加固量、剪跨比、FRP材料类型等对受剪性能的影响,着重研究了U型FRP布受剪加固的剥离破坏性能和承载力。根据FRP布应变的试验实测结果,分析了剥离破坏时FRP布的有效发挥程度及其对受剪承载力的贡献,提出了U形FRP布受剪加固混凝土梁剥离承载力的计算公式。
The shear capacity of RC beam strengthened with externally bonded FRP sheets is studied. It is for the test that ten pieces of specimens of RC beams, including one unstrengthened controlled specimen, are made. The parameters considered in the tests are the FRP amount, the shear-span ratio, and the FRP types. It is stressed that the failure of debonding and shear capacity for the U type of FRP sheets are studied. At last, a simplified formula for the shear capacity of RC beam strengthened with the U type of FRP sheets is proposed in the paper. It is found that the calculated results are in a good agreement with that of the test
出处
《土木工程学报》
EI
CSCD
北大核心
2003年第11期12-18,共7页
China Civil Engineering Journal
基金
国家自然科学重点基金(50238030)
国家高技术研究发展计划(863计划)项目(2001AA336010)资助
关键词
纤维复合材料
受剪承载力
加固
剥离
钢筋混凝土梁
fiber reinforced polymer (FRP), shear capacity, strengthening, debonding, RC beam
