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通过数值计算和试验 ,对外贴玻璃纤维加强复合材料加固受弯构件的受力全过程进行了研究 ,探讨了加固后钢筋混凝土受弯构件正截面的破坏特征、受力特点以及影响因素 ,并在此基础上建立了加固后正截面抗弯承载能力计算公式。分析结果表明 ,加固构件的受力全过程包括整体工作、带裂缝工作、纤维增强和粘结损伤等 4个阶段 ,在前 3个阶段中采用平截面假设计算得到的计算结果与试验结果吻合较好 ,但进入第 4阶段后 ,由于局部粘结破坏 ,构件的实际变形能力明显大于计算值
Through the numerical calculation and experiment, the whole process of stressing flexural members strengthened with glass fiber reinforced composites was studied. The failure characteristics, force characteristics and influencing factors of normal section of reinforced flexural members were discussed. Based on this, the formula of flexural capacity of normal section after reinforcement is established. The analysis results show that the whole process of the reinforced members’ stress includes four phases: integral work, crack work, fiber reinforcement and bond damage. The calculated results obtained by using the flat section hypothesis in the first three stages are in good agreement with the experimental ones Well, but after entering the fourth stage, due to the local bond damage, the actual deformation capacity of the component is significantly greater than the calculated value