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新型钢-连续纤维复合筋(SFCB)是一种以普通钢筋为内芯,外包纵向连续纤维的新型筋材。SFCB由于良好的力学性能、高耐久性和高性价比而在嵌入式加固中具有独特的优势。对SFCB嵌入式加固RC梁的承载力分析方法进行介绍,首先根据平截面假定及力的平衡,提出了SFCB嵌入式加固钢筋混凝土梁非粘结破坏时的受弯承载力计算方法;然后对嵌入式加固RC梁始于加载点附近开始的剥离破坏现象进行了理论分析,并给出了是否会发生粘结剥离破坏的判别方法和极限承载力的计算方法;最后,将计算结果与嵌入式加固RC梁试验结果进行了比较,认为该方法对破坏模式和极限承载力的预测均具有较好的精度。
The new type of steel-continuous fiber composite (SFCB) is a new kind of reinforced material with ordinary steel bars as the core and outer longitudinal continuous fibers. SFCB has unique advantages in embedded reinforcement due to its good mechanical properties, high durability and high cost performance. Based on the assumptions of flat section and the balance of forces, the calculation method of flexural capacity of non-bonded SFCB reinforced reinforced concrete beams with non-bonding failure is proposed. Then, The RC girder reinforced with RC beams starts from the peel failure near the loading point, and gives the method to determine whether the peel failure will occur and the method to calculate the ultimate bearing capacity. Finally, the calculation results are compared with those of the built- RC beam test results are compared, that the method of failure mode and ultimate bearing capacity of the prediction have good accuracy.