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Bond and flexural performance of basalt fiber–reinforced polymer bar–reinforced seawater sea sand glass aggregate concrete beams
Advances in Structural Engineering ( IF 2.1 ) Pub Date : 2021-06-18 , DOI: 10.1177/13694332211026228
Zhiqiang Dong 1, 2 , Gang Wu 1, 2 , Hong Zhu 1, 2 , Yang Wei 3 , Xiao-Ling Zhao 4 , Xinxing Shao 1
Affiliation  

This article proposes a new type of basalt fiber–reinforced polymer (BFRP) bar–reinforced seawater sea sand glass aggregate concrete (SSGC) beam with broad application prospects in ocean engineering. Crushed tempered glasses were utilized as coarse aggregates in the concrete mixture to realize the efficient and harmless recycling of waste glass. First, the bond behaviors between the BFRP bars and SSGC with different glass aggregate replacement ratios were investigated. Then, four-point bending tests were conducted to investigate the flexural performance of the SSGC beams completely reinforced with BFRP bars. Based on this, the tested flexural strengths were compared with the calculated strengths to evaluate whether the existing specifications were still applicable to the design of the BFRP bar–reinforced SSGC beams. Test results showed that although the compressive strength of the SSGC gradually decreased with increased glass aggregate content, the bond performance between BFRP bars and SSGC did not follow the same degradation pattern. There were no obvious differences in the form of the bond–slip curves between BFRP bars and different types of SSGC. With increasing glass aggregate content, the ultimate bearing capacity and energy consumption of BFRP bar–reinforced SSGC beams decreased. All calculated ultimate flexural capacities were higher than the experimental values, which shows that the application of existing specifications to BFRP bar–reinforced SSGC beams needs to be studied further.



中文翻译:

玄武岩纤维增强聚合物筋增强海水海砂玻璃骨料混凝土梁的粘结和抗弯性能

本文提出了一种新型玄武岩纤维增强聚合物(BFRP)钢筋海水海砂玻璃骨料混凝土(SSGC)梁,在海洋工程中具有广阔的应用前景。利用粉碎的钢化玻璃作为混凝土混合料中的粗骨料,实现废玻璃的高效无害化回收利用。首先,研究了具有不同玻璃骨料替代率的 BFRP 条和 SSGC 之间的粘合行为。然后,进行四点弯曲试验以研究用 BFRP 钢筋完全加固的 SSGC 梁的弯曲性能。在此基础上,将测试的抗弯强度与计算强度进行比较,以评估现有规范是否仍然适用于 BFRP 钢筋 SSGC 梁的设计。测试结果表明,尽管 SSGC 的抗压强度随着玻璃骨料含量的增加而逐渐降低,但 BFRP 条和 SSGC 之间的粘合性能并没有遵循相同的退化模式。BFRP 钢筋与不同类型 SSGC 之间的粘结滑移曲线形式没有明显差异。随着玻璃骨料含量的增加,BFRP筋增强SSGC梁的极限承载力和能耗降低。所有计算出的极限抗弯承载力均高于实验值,这表明现有规范在 BFRP 钢筋 SSGC 梁上的应用需要进一步研究。BFRP 条和 SSGC 之间的粘合性能没有遵循相同的退化模式。BFRP 钢筋与不同类型 SSGC 之间的粘结滑移曲线形式没有明显差异。随着玻璃骨料含量的增加,BFRP筋增强SSGC梁的极限承载力和能耗降低。所有计算出的极限抗弯承载力均高于实验值,这表明现有规范在 BFRP 钢筋 SSGC 梁上的应用需要进一步研究。BFRP 条和 SSGC 之间的粘合性能没有遵循相同的退化模式。BFRP 钢筋与不同类型 SSGC 之间的粘结滑移曲线形式没有明显差异。随着玻璃骨料含量的增加,BFRP筋增强SSGC梁的极限承载力和能耗降低。所有计算出的极限抗弯承载力均高于实验值,这表明现有规范在 BFRP 钢筋 SSGC 梁上的应用需要进一步研究。

更新日期:2021-06-19
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