使用铁水泥修复受火灾破坏的钢筋混凝土楼板

IF 1 Q4 ENGINEERING, CIVIL

Jordan Journal of Civil Engineering Pub Date : 2024-01-01 DOI:10.14525/jjce.v18i1.10

Raneen Aldarf

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引用次数: 0

摘要

本研究旨在探讨使用铁水泥加固双向钢筋混凝土板在直接受火后的抗弯行为的影响。研究人员将 12 块钢筋混凝土板直接暴露在火中一小时，然后用空气和水冷却。然后使用不同的粘结模式（表面粗化、SBR 材料和螺钉）在这些板上修复一层铁水泥。研究了这些变量对荷载-挠度关系、极限承载能力、刚度、能量吸收、延展系数和压缩区应变的影响。结果表明，所有研究参数都有明显改善，证明了铁水泥加固在改善楼板性能方面的效率。它有助于提高楼板的极限承载能力和初始刚度，防止和阻止开裂后裂缝的扩展，甚至在达到坍塌后也是如此。SBR 材料在确保受损板表面与钢筋层之间的粘合方面的有效性也得到了揭示。关键词：实心板、直燃火焰、铁水泥、修复、SBR（丁苯橡胶）、粗加工。

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Rehabilitation of Fire-damaged Reinforced-concrete Slabs Using Ferro-cement

his study was conducted to investigate the effect of strengthening with ferro-cement on the flexural behavior of two-way RC slabs after exposure to direct fire. Twelve reinforced-concrete slabs were exposed to direct fire for one hour and cooled with air and water. They were then rehabilitated with a layer of ferro-cement using different bonding patterns (surface roughening, SBR material and screws). The effect of these variables was studied on the load-deflection relationship, ultimate load capacity, stiffness, energy absorption, ductility factor and strains of the compressed zone. The results showed a significant improvement in all the investigated parameters, demonstrating the efficiency of ferro-cement strengthening in improving the behavior of the slabs. It contributed to increasing the ultimate load capacity and initial stiffness of the slabs and to preventing and arresting crack propagation after cracking and even after reaching collapse. The effectiveness of SBR material in ensuring the bonding between the surface of the damaged slabs and the reinforcement layer was also revealed. KEYWORDS: Solid slab, Direct fire flame, Ferro-cement, Rehabilitation, SBR (styrene-butadiene rubber), Roughing.

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来源期刊

Jordan Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

2.10

自引率

27.30%

发文量

期刊介绍： I am very pleased and honored to be appointed as an Editor-in-Chief of the Jordan Journal of Civil Engineering which enjoys an excellent reputation, both locally and internationally. Since development is the essence of life, I hope to continue developing this distinguished Journal, building on the effort of all the Editors-in-Chief and Editorial Board Members as well as Advisory Boards of the Journal since its establishment about a decade ago. I will do my best to focus on publishing high quality diverse articles and move forward in the indexing issue of the Journal.