Capacity reinstatement of reinforced concrete one-way ribbed slabs with rib-cutting shear zone openings: Hybrid fiber reinforced polymer/steel technique

IF 2.1 4区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Advances in Structural Engineering Pub Date : 2024-08-21 DOI:10.1177/13694332241276060

Hussein Elsanadedy, Amjad Al Kallas, Husain Abbas, Tarek Almusallam, Yousef Al-Salloum

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Abstract

This study examined the use of two configurations for capacity restoration of reinforced concrete (RC) one-way ribbed slabs containing openings in shear zones. Four specimens of half-scale comprised three ribs in addition to a top RC slab. The test plan included a control specimen without openings, one with two rib-cutting shear openings, one strengthened using a blend of carbon FRP (CFRP) composites and steel plates, and another retrofitted with a combination of glass FRP (GFRP) composites and steel plates. The two strengthening schemes were found successful at fully restoring the ultimate load of the specimens. The ultimate load of specimen strengthened using the hybrid CFRP/steel system exceeded the control slab without openings by 52%. However, in the other specimen where a mix of steel plates and GFRP sheets was used, the load capacity was only 5% less than the control specimen without openings. While the dissipated energy and stiffness were reinstated and improved for the hybrid CFRP/steel system, they were partially restored for the GFRP/steel system. Additionally, a prediction approach was developed to estimate the maximum load of the slabs. The developed approach considered potential shear and flexural modes of failure, providing close predictions of the ultimate load.

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带切肋剪力区开口的钢筋混凝土单向肋板的承载力恢复：纤维增强聚合物/钢混合技术

本研究考察了使用两种配置来恢复剪切区中含有开口的钢筋混凝土（RC）单向肋板的承载力。四个半比例试样由三根肋条和一个顶部 RC 板组成。测试计划包括一个不带开口的对照试样、一个带两个切肋剪切开口的试样、一个使用碳玻璃纤维增强塑料（CFRP）复合材料和钢板混合加固的试样，以及另一个使用玻璃纤维增强塑料（GFRP）复合材料和钢板组合加固的试样。这两种加固方案都成功地完全恢复了试样的极限荷载。使用混合 CFRP/ 钢系统加固的试样的极限荷载比没有开口的对照板高出 52%。然而，在另一个混合使用钢板和 GFRP 片材的试样中，承载能力仅比无开口的对照试样低 5%。CFRP/ 钢混合系统的耗散能量和刚度得到了恢复和改善，而 GFRP/ 钢系统的耗散能量和刚度则得到了部分恢复。此外，还开发了一种预测方法来估算楼板的最大荷载。所开发的方法考虑了潜在的剪切和挠曲失效模式，提供了接近极限荷载的预测。

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来源期刊

Advances in Structural Engineering 工程技术-工程：土木

CiteScore

5.00

自引率

11.50%

发文量

230

审稿时长

2.3 months

期刊介绍： Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.