中文摘要：

根据混凝土构件中各种材料的应力-应变关系及变形协调原理，讨论考虑初始应变的钢筋混凝土薄壁箱梁外曼占碳纤维增强材料（CFRP）抗弯加固后的破坏形态．基于平截面假定和规程推荐的材料应力-应变关系，分析加固梁弯曲破坏时的极限状态，提出相应的极限承载力计算公式和极限破坏发生条件．

英文摘要：

The failure mode of thin-walled RC box-beams with externally bound carbon fiber reinforcing plastics for bending reinforcement was discussed on the basis of the stress-strain relationship of a variety of materials for concrete components, principle of consistent deformation, and consideration of initial strain of the beam. The ultimate condition of bending failure of the reinforced beam was analyzed on the basis of the presumption of planar sections and stress-strain relationship of materials recommended by their rules. Meantime, the corresponding evaluation formula of ultimate bearing capacity and the conditions of ultimate failure occurence were presented, also.