Size effect on concrete shear strength in beams reinforced with fiber-reinforced polymer bars
Size effect on concrete shear strength in beams reinforced with fiber-reinforced polymer bars
复制标题
纤维增强聚合物钢筋梁混凝土抗剪强度的尺寸效应
DOI：
10.14359/51685747
复制
发表时间：
2013
影响因子：
1.8
通讯作者：
B. Benmokrane
中科院分区：
文献类型：
--
作者：
F. Matta;A. El;A. Nanni;B. Benmokrane
研究尺寸效应对FRP筋加固梁混凝土抗剪强度的影响具有基础性和现实意义。ACI 440剪切设计算法的标定和验证主要基于最大有效深度为360 mm （14.19 in.）的试件试验结果，并不总是具有大规模应用的代表性。本文介绍了无剪力钢筋的frp -钢筋混凝土梁的室内试验结果，其最大有效深度为883 mm （34.75 In .）。根据文献中关于标准强度混凝土的可用结果，讨论了强度的尺度与有效深度、配筋率、骨料尺寸以及最小剪切钢筋和纵向表皮钢筋的存在有关。然后评估具有代表性的北美设计算法，这些算法主要考虑了未开裂混凝土受压（ACI）和骨料联锁（CSA）所抵抗的剪力。
The understanding of size effect on the concrete shear strength of beams reinforced with fiber-reinforced polymer (FRP) bars is of fundamental and practical significance. The calibration and verification of the ACI 440 shear design algorithm has been mainly based on experimental results from specimens with a maximum effective depth of 360 mm (14.19 in.), which are not always representative of large-scale applications. In this paper, the results of laboratory tests on scaled FRP-reinforced concrete beams without shear reinforcement, having a maximum effective depth of 883 mm (34.75 in.), are presented. Based also on results available in the literature for normal-strength concrete, the scaling of strength is discussed in relation to effective depth, reinforcement ratio, aggregate size, and presence of minimum shear reinforcement and longitudinal skin reinforcement. Representative North American design algorithms that account for the shear force being resisted primarily by the uncracked concrete in compression (ACI) and through aggregate interlock (CSA) are then assessed.