To investigate the influence of interface treatment methods on the flexural performance of CFRP-ECC composite reinforced con-crete beams,the change patterns of experimental beam failure modes,load deflection curves,ductility coefficients,and other indicators were analyzed through four point bending tests,and the calculation formula for the bearing capacity of CFRP-ECC composite reinforced concrete beams was determined.The results showed that compared to the natural surface,the use of chiseling or interface agent treatment changed the failure mode of the test beam,causing the CFRP-ECC composite reinforcement layer to transform from peeling failure to tensile fail-ure.Compared with RC beams,when using natural surface treatment,the ultimate bearing capacity and ductility coefficient of the specimens only increase by 8.7％～12.1％and 2.5％～7.3％,respectively.However,when using chiseling or interface agent treatment,the ultimate bearing capacity increases by 34.9％～44.1％,and the ductility coefficient increases by 15.2％～19.0％.The proposed formula can pro-vide theoretical reference for the design and calculation of CFRP-ECC composite reinforced concrete beams,with a maximum error of only 6.7％between the calculated and experimental values.
关键词
CFRP/ECC/受弯性能/界面处理方式/承载力计算公式
Key words
CFRP/ECC/Flexural performance/Interface treatment method/Calculation formula for bearing capacity
维普
万方数据