南京工业大学学报（自然科学版）2017，Vol.39Issue(5)：19-26,38,9.DOI:10.3969/j.issn.1671-7627.2017.05.004
CFRP-混凝土黏结界面的剪切滑移性能
Shear-slip performance of the CFRP-concrete interface
摘要
Abstract
Carbon fibre reinforced polymer ( CFRP ) has been widely applied in retrofitting and repairing components and structures. To study more about the mechanical property of CFRP retrofitted concrete structures,the quasi-static stretch-shear test was carried out to study the shear-slip performance of CFRP-concrete interface. The shear stress-displacement relationship and strain distribution of CFRP were obtained, and failure modes of the CFRP-concrete interface were observed. The shear-slip failure mechanism of the CFRP-concrete interface was revealed. A refined FE model of the CFRP-concrete interface was established and the simulated results were compared with the test results. It shows that a brittle shear failure occurs in the CFRP-concrete interface,which mainly located in the concrete layer.The shear resistance of the interface depends on the concrete shear strength.It is difficult to predict the coming failure interface by monitoring the development of CFRP strain in the initial loading stage.Though a non-bond zone was set,a triangle concrete block was still pulled down at the end of the specimen whose size depends on the effective bonding area.CFRP strain increased linearly with the loading around the junction of the bonding zone. The effective bonding length is 51% of the whole bonding length. Numerical results are consistent with the test data,which also validates the FE model.关键词
双剪试验/CFRP-混凝土界面/黏结性能/应变Key words
double-shear test/CFRP-concrete interface/bond property/strain分类
建筑与水利引用本文复制引用
胡晔,陈力,方秦,郑康,高飞..CFRP-混凝土黏结界面的剪切滑移性能[J].南京工业大学学报（自然科学版）,2017,39(5):19-26,38,9.基金项目
国家重点研发计划(2016YFC0305200) （2016YFC0305200）
国家自然科学基金优秀青年科学基金(51622812) （51622812）
国家重点基础研究发展计划(973计划)(2015CB058003) （973计划）
