（中南大学土木建筑学院 长沙   410075）
【提要】 对内嵌FRP加固矩形截面梁的三种弯曲破坏形式（钢筋屈服前混凝土压碎、钢筋屈服后混凝土压碎和钢筋屈服后FRP拉断）和两种界限破坏情形（钢筋屈服时混凝土压碎和FRP拉断时混凝土压碎）进行了极限状态分析，提出了各种弯曲破坏极限状态相应的承载力计算公式和界限条件，其计算结果与作者及国外已有试验实测值吻合较好。
【关键词】 FRP 内嵌 加固 钢筋混凝土 受弯承载力 破坏形态
Prediction of Flexural Capacities for RC Beams Strengthened with NSM FRP Reinforcement
/Zhou Chaoyang, Xiang Chuanjia, He Xuejun (School of Civil Engineering and Architecture, Central South University, Changsha 410075, China)
Abstract:Three bending failure modes (concrete crush before steel yield, concrete crush after steel yield, FRP break after steel yield) and two ultimate limit states of bending failure (steel yield and concrete crush at the same time, FRP break and concrete crushed at the same time) are discussed for reinforced concrete beams strengthened with nearsurfacemounted fiberreinforcedplastics. The expressions are derived for their flexural capacities and the predicted results are in good agreement with the measured ones from tests of the author and other investigators abroad.
Keywords:FRP; near surface mounted; strengthening; reinforced concrete; flexural capacity; failure mode