PSI - Issue 64

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 1057–1064

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Simulation of Two-way Slabs Strengthened in Punching with CFRP Strips Shamsoon Fareed a , Asad-ur-Rehman Khan a *, Laiba Ayub a a Department of Civil Engineering, NED University of Engineering & Technology, Karachi-75270, Pakistan Abstract Two-way slabs are vulnerable to two-way punching shear which may cause catastrophic failures. Furthermore, over the recent past, the trend has been set to use construction waste as recycled aggregates in structural concrete. Therefore, the work presented herein, numerically investigates in detail, the response of the natural aggregate concrete (NAC) and recycled aggregate concrete (RAC), two-way reinforced concrete (RC) slabs both under punching shear. The work also focuses on simulating the behavior of such slabs strengthened and/or retrofitted with the strips of carbon fiber reinforced polymer (CFRP). The detailed numerical investigation revealed that the overall stiffness of slabs strengthened with CFRP increased when compared with NAC and RAC slabs having no CFRP. The placement of the strips from the face of the column was also found to be effective in reducing the deflections of the slabs at similar load levels. For both NAC and RAC specimens, the influence of slab thickness and concrete compressive strength was found to be influencing parameters on the behavior of the slabs. © 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 SMAR 2024 Organizers Keywords: Recycled aggregate concrete; Two-way slabs; carbon fiber reinforced polymers; Punching Shear; Retrofitting 1. Introduction Due to the increasing cost of construction, the construction of large apartments and shopping malls has witnessed a rise in the construction of the flat slabs. These slabs, on the one hand, decrease the number of supporting beams, SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Simulation of Two-way Slabs Strengthened in Punching with CFRP Strips Shamsoon Fareed a , Asad-ur-Rehman Khan a *, Laiba Ayub a a Department of Civil Engineering, NED University of Engineering & Technology, Karachi-75270, Pakistan Abstract Two-way slabs are vulnerable to two-way punching shear which may cause catastrophic failures. Furthermore, over the recent past, the trend has been set to use construction waste as recycled aggregates in structural concrete. Therefore, the work presented herein, numerically investigates in detail, the response of the natural aggregate concrete (NAC) and recycled aggregate concrete (RAC), two-way reinforced concrete (RC) slabs both under punching shear. The work also focuses on simulating the behavior of such slabs strengthened and/or retrofitted with the strips of carbon fiber reinforced polymer (CFRP). The detailed numerical investigation revealed that the overall stiffness of slabs strengthened with CFRP increased when compared with NAC and RAC slabs having no CFRP. The placement of the strips from the face of the column was also found to be effective in reducing the deflections of the slabs at similar load levels. For both NAC and RAC specimens, the influence of slab thickness and concrete compressive strength was found to be influencing parameters on the behavior of the slabs. © 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 SMAR 2024 Organizers Keywords: Recycled aggregate concrete; Two-way slabs; carbon fiber reinforced polymers; Punching Shear; Retrofitting 1. Introduction Due to the increasing cost of construction, the construction of large apartments and shopping malls has witnessed a rise in the construction of the flat slabs. These slabs, on the one hand, decrease the number of supporting beams, © 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 SMAR 2024 Organizers

* Corresponding author. Tel.: +92-99261275; fax: +92-99261265. E-mail address: asadkhan@neduet.edu.pk * Corresponding author. Tel.: +92-99261275; fax: +92-99261265. E-mail address: asadkhan@neduet.edu.pk

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 SMAR 2024 Organizers 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 SMAR 2024 Organizers

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