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首页> 外文期刊>Journal of Composites for Construction >Flexural Behavior of Steel Fiber-Reinforced Lightweight Aggregate Concrete Beams Reinforced with Glass Fiber-Reinforced Polymer Bars
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Flexural Behavior of Steel Fiber-Reinforced Lightweight Aggregate Concrete Beams Reinforced with Glass Fiber-Reinforced Polymer Bars

机译：用玻璃纤维增​​强聚合物棒加固钢纤维增强轻质混凝土混凝土梁的弯曲行为

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摘要

Nine beams reinforced with glass fiber-reinforced polymer (GFRP) bars and one reinforced with steel rebars fabricated using high-strength lightweight aggregate concrete (HSLC) were tested under four-point bending with different steel fiber contents, reinforcement ratios, and bar diameters to investigate their flexural strength and serviceability performance. The test results showed that specimens with steel fibers exhibited a lower deflection and a higher load-carrying capacity. The reinforcement ratio significantly affected serviceability performance, but bar diameter had a marginal effect. Generally, at service-load levels, the specimens exhibited acceptable midspan deflections but greater crack widths compared to the limits recommended by the codes. The experimental ultimate strengths, midspan deflections, and crack widths were used to assess the accuracy of prediction equations in standards in the US, China, and Canada. Rational deflection models for GFRP-reinforced normal weight concrete (NWC) beams were proposed based on the results from the available literature and were modified by introducing two correction factors of 0.85 and 1.35 for the GFRP-reinforced lightweight aggregate concrete (LC) and steel fiber-reinforced lightweight aggregate concrete (SFLC) beams, respectively. (C) 2018 American Society of Civil Engineers.
机译：用不同的钢纤维内容，增强比和条直径和钢筋直径进行玻璃纤维增​​强聚合物（GFRP）棒和使用高强度轻质混凝土混凝土（HSLC）制造的钢钢筋加强的九梁。调查它们的抗弯强度和可维护性性能。测试结果表明，具有钢纤维的标本表现出较低的偏转和载荷能力较高。强化比显着影响可用性性能，但条形直径具有边际效果。通常，在服务负载水平，标本表现出可接受的中间偏转，而是与代码推荐的限制相比的更大的裂缝宽度。实验极限强度，中坡偏转和裂缝宽度用于评估美国，中国和加拿大标准的预测方程的准确性。基于可用文献的结果提出了GFRP加强正常重量混凝土（NWC）梁的合理偏转模型，并通过为GFRP加强的轻质聚集体混凝土（LC）和钢纤维引入0.85和1.35的两种校正因子来改变。 - 重量轻量级聚集体混凝土（SFLC）光束。 （c）2018年美国土木工程学会。

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