【摘要】 采用试验和有限元分析相结合的方法,分析了外贴CFRP布加固梁的承载能力、变形特性、破坏形式和CFRP布加固承载机理.研究表明:外贴CFRP布加固能有效地提高钢筋混凝土梁的承载能力;CFRP布加固梁的刚度随CFRP布粘贴层数的增加而增加;CFRP布的高强特性在受拉钢筋应力水平较高时发挥得较充分;CFRP布加固不仅可以提高钢筋混凝土梁的承载能力,而且可以大幅度地提高其安全储备.更多还原

【Abstract】 Carbon fiber reinforced polymer (CFRP) sheets are being successfully used for strengthening of existing reinforced concrete (RC) structures. The bearing capacity, deflection characteristic, failure mode of strengthened RC beams and mechanism of CFPR sheets in strengthening of RC structures were analyzed by use of beam test and FEM. The results indicate that the adoption of CFRP sheets can effectively improve the bearing capacity of beams, and that the stiffness of strengthened beams increases with the number of layers of CFRP sheets. Besides, the high strength of CFRP sheets can be fully played at high stress stage of steel bars and can greatly improve the safety margin of RC beams.更多还原