Strengthening of Polypropylene fiber reinforced flat slab using BFRP fan and laminate against line loading.

Procedia Structural Integrity Pub Date : 2024-01-01 DOI:10.1016/j.prostr.2024.05.079

Swathy S , Preetha R , Ashok Kumar J , Tapesh Derwal , Rahima Shabeen

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Abstract

This paper investigates the comparative study of performance of two-way polypropylene fiber reinforced flat slab strengthened with BFRP (Basalt fiber reinforced polymer) fan and laminate against concentric loading. Three slabs of same dimension (1000 x 1000 x 135mm) were casted. Two slabs were reinforced with an optimum percentage (say 0.3%) of polypropylene fiber and one slab is taken as the control specimen. One of the slabs are Strengthened with BFRP string (obtained from basalt fabrics) having a fan shape as a new strengthening technique. For strengthening 16 double strand strengtheners were used and strengthened from a critical distance for punching shear of d/2 from the column face. Another slab is strengthened with basalt strip in a radial pattern.

The result reveals that the suggested strengthening technique increased the load carrying capacity and enhances the ductile behavior of the flat slab in comparison with the unstrengthen slab. These strengthening methods are capable of enhancing both maximum loading capacity and reduce the formation of retraction crack thus avoids brittle failures that may occur under line loading. This method of strengthening improves the bearing capacity of the slab without increasing the size of the structural components.

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使用 BFRP 扇形板和层压板加固聚丙烯纤维加固平板，以抵抗线荷载。

本文探讨了用 BFRP（玄武岩纤维增强聚合物）扇形板和层压板加固的双向聚丙烯纤维增强平板在承受同心荷载时的性能比较研究。共浇铸了三块相同尺寸（1000 x 1000 x 135 毫米）的平板。其中两块板用最佳比例（如 0.3%）的聚丙烯纤维加固，一块板作为对照试样。其中一块板采用扇形的 BFRP 绳（从玄武岩织物中提取）作为新的加固技术进行加固。在加固过程中，使用了 16 根双股加强筋，并从距柱面 d/2 的冲剪临界距离开始加固。结果表明，与未加固的平板相比，所建议的加固技术提高了平板的承载能力，并增强了平板的延展性能。这些加固方法既能提高最大承载能力，又能减少回缩裂缝的形成，从而避免了线荷载下可能出现的脆性破坏。这种加固方法在不增加结构部件尺寸的情况下提高了楼板的承载能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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