Tensile Lap Splicing of Fiber-Reinforced Polymer Reinforcing Bars in Concrete
Tensile Lap Splicing of Fiber-Reinforced Polymer Reinforcing Bars in Concrete
复制标题
混凝土中纤维增强聚合物钢筋的拉伸搭接拼接
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
U. Ebead
中科院分区：
文献类型：
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作者：
Ragia Aly;B. Benmokrane;U. Ebead
目前对纤维增强聚合物（FRP）钢筋粘合作为受弯混凝土构件的研究非常有限。由于FRP筋的机械性能和表面结构存在固有的差异，现行的钢筋标准不能用于FRP筋。12根混凝土梁的尺寸为250毫米（9.85英寸）宽，400毫米（15.76英寸）厚，跨度为4200毫米（165.48英寸）。横梁用拼接的碳或玻璃FRP筋加固。研究了棒材直径和接头长度对粘结强度的影响。此外，对现有的拼接FRP筋建议（ACI 440.1R-03、CAN/CSA-S806-02、ISIS-M03-01和CAN/ CSA-S6-00）进行了评估。试验表明，FRP的应力极限与拼接长度成正比。此外，极限强度分析方法可用于预测拼接FRP筋的最大应力。此外，还给出了不同直径FRP筋的平均粘结强度和临界拼接长度。
There are very limited studies on bond of spliced fiber-reinforced polymer (FRP) bars as a reinforcement of flexural concrete members. The current standards for steel reinforcement cannot be used for the FRP bars due to the inherent differences in their mechanical properties and surface configurations. The results of 12 concrete beams of dimensions 250 mm (9.85 in.) in width and 400 mm (15.76 in.) in thickness and spanned at 4200 mm (165.48 in.) are presented. The beams were reinforced with spliced carbon or glass FRP bars. The effects of the bar diameter and splice length on the bond strength are investigated. Furthermore, an evaluation of the existing recommendations for the spliced FRP bars (ACI 440.1R-03, CAN/CSA-S806-02, ISIS-M03-01, and CAN/ CSA-S6-00) is presented. Tests indicated that the FRP stress limit is directly proportional to the splice length. Moreover, the ultimate strength analysis method can be used to predict the maximum stress in the spliced FRP bars. In addition, the average bond strengths and the critical splice lengths for the FRP bars with different diameters are outlined.