Influence of Compressive Strength of Concrete on Shear Strengthening of Reinforced Concrete Beams with Near Surface Mounted Carbon Fiber-Reinforced Polymer

材料科学 条状物 碳纤维增强聚合物 结构工程 抗压强度 剪切(地质) 复合材料 矩形 失效模式及影响分析 纤维增强塑料 钢筋混凝土 有限元法 抗剪强度(土壤) 梁(结构) 工程类 地质学 土壤科学 土壤水分 数学 几何学
作者
Ma’en Abdel-Jaber,Mu’tasim Abdel-Jaber,Hasan Katkhuda,Nasim Shatarat,Rola El-Nimri
出处
期刊:Buildings [Multidisciplinary Digital Publishing Institute]
卷期号:11 (11): 563-563 被引量:21
标识
DOI:10.3390/buildings11110563
摘要

This paper investigates the effect of using near-surface mounted carbon fiber-reinforced polymer (NSM-CFRP) on the shear strengthening of rectangle beams with low strength concrete (f′c = 17 MPa), medium strength concrete (f′c = 32 MPa), and high strength concrete (f′c = 47 MPa). The experimental program was performed by installing NSM-CFRP strips vertically in three different configurations: aligned with the internal stirrups, one vertical NSM-CFRP strip between every two internal stirrups, and two vertical NSM-CFRP strips between every two internal stirrups. All tested beams were simply supported beams and tested under a three-point loading test. The experimental results were compared with the theoretical capacities that were calculated according to the ACI 440.2R-17 and finite element analysis (FEA) that was conducted using ABAQUS software to simulate the behavior of all beams. The experimental results indicated that using NSM-CFRP limited the failure mode of all beams to pure shear failure with no debonding or rapture of the carbon strips. Moreover, the use of NSM-CFRP proved its efficiency by increasing the shear capacity of all beams by a range of 4% to 66%, in which the best enhancement was recorded for the case of using two unaligned NSM-CFRP strips. In general, the experimental shear capacities increased with the increase in the compressive strength of all beams. On the other hand, the ACI 440.2R-17 was conservative in predicting the theoretical shear capacities, and the FEA results agreed well with the experimental results.
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