Structural performance and serviceability of concrete beams reinforced with hybrid (GFRP and steel) bars
Structural performance and serviceability of concrete beams reinforced with hybrid (GFRP and steel) bars
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DOI：
10.1016/j.conbuildmat.2015.08.063
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发表时间：
2015-10-15
影响因子：
7.4
通讯作者：
Al-Rahmani, Abdullah
中科院分区：
文献类型：
--
作者：
El Refai, Ahmed;Abed, Farid;Al-Rahmani, Abdullah
本文报道了混合配筋混凝土梁的结构性能。用钢和玻璃纤维增强聚合物（GFRP）钢筋组合加固的6个混凝土梁和其他3个仅用GFRP钢筋加固的梁进行了弯曲试验。超配筋混合梁的强度和延性均高于gfrp配筋混合梁。CSA-S806-12方程准确地预测了高有效配筋率混合配筋梁的挠度。在试验结果的基础上，采用ACI-440.1R-06方程，提出了预测混合配筋梁裂缝宽度的粘结系数。采用修正变形系数对混合配筋梁的变形性能进行了评价。试验结果与预测结果的比较表明，模型在预测混合钢筋混凝土梁的承载能力、挠度、裂缝宽度和变形能力方面是适当的。(C) 2015 Elsevier Ltd.版权所有。
This paper reports on the structural performance of concrete beams reinforced with hybrid reinforcement. Six concrete beams reinforced with a combination of steel and glass fiber-reinforced polymer (GFRP) bars and three other beams reinforced with only GFRP bars were tested in flexure. Over-reinforced hybrid beams showed higher strength and ductility than their GFRP-reinforced counterparts. The CSA-S806-12 equation accurately predicted the deflections of the hybrid-reinforced beams with high effective reinforcement ratios. Based on the test results, a bond coefficient was proposed to predict the crack width of the hybrid-reinforced beams using the ACI-440.1R-06 equation. A modified deformability factor was also utilized to assess the deformability of the hybrid-reinforced beams. Comparison between the experimental and predicted results showed the adequacy of the models used in predicting the load-carrying capacity, deflection, crack widths, and deformability of hybrid-reinforced concrete beams. (C) 2015 Elsevier Ltd. All rights reserved.