PSI - Issue 60

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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Procedia Structural Integrity 60 (2024) 591–603

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICONS 2023 Organizers 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. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICONS 2023 Organizers Keywords: Basalt strip, BFRP fan, Flat slab, Polypropylene fibre, Line loading; 1. Introduction Flat slab is a popular system that is commonly used in all residential building, commercial building, hotels, malls and hospitals. Flat slab transfer load directly to the supporting column. Flat slab has been constructed due to its * Corresponding author. Tel.:/; fax:/. E-mail address: dsswathy2002@gmail.com. 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICONS 2023 Organizers Third International Conference on Structural Integrity 2023 (ICONS 2023) Strengthening of Polypropylene fiber reinforced flat slab using BFRP fan and laminate against line loading. Swathy S a,* , Preetha R a,b , Ashok Kumar J b , Tapesh Derwal b , Rahima Shabeen b a Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600025, India a, b Civil Engineering group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India b Civil Engineering group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India b Civil Engineering group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India b Department of Civil Engineering, College of Engineering Guindy, Anna University, Chennai 600025, India Abstract

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ICONS 2023 Organizers 10.1016/j.prostr.2024.05.079