PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 485–492

Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Experimental Investigation on Bacterial Concrete with Zeolite for Structural Health Monitoring Applications

Vijaya Sundravel K a, * , Vijayaprasanna P a , Mageshkumar P a , Arulmozhi S b a Department of Civil Engineering, K.S.Rangasamy College of Technology, Tiruchengode - 637215, Tamilnadu, India. b Department of Civil Engineering, Erode Sengunthar Engineering College, Thudupathi - 638 057, Tamilnadu, India.

Abstract

The degradation of civil infrastructure due to poor design, construction flaws, chemical attacks, and aging necessitates innovative methods to enhance performance without adding excessive weight, cost, or maintenance time. Polymer composite materials, especially Fiber Reinforced Plastics (FRP), provide viable solutions for retrofitting and repairing structures. While Carbon Fiber Reinforced Plastics (CFRP) are commonly employed for strengthening purposes, limited research exists on health monitoring of such structures. A critical challenge is the sudden debonding of CFRP from concrete. This study introduces an approach using Fiber Bragg Grating (FBG) sensors, compact and compatible for embedding at the concrete CFRP interface, to monitor interfacial strain effectively. Through experimental investigations on concrete beams strengthened with CFRP beneath various loading conditions, the effectiveness of FBG sensors for strain measurement was validated. The study also incorporated numerical modeling to align with experimental findings. Additional evaluations under elevated temperatures and marine exposure were conducted to analyze degradation and long-term performance. Calibration curves were generated to address temperature-induced strain variations. The findings demonstrate that FBG sensors are a reliable tool for interface strain measurement in CFRP-strengthened concrete structures, enabling better monitoring and maintenance. © 2025 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 the responsibility of International Conference on Structural Integrity Organizers

Keywords: Interfacial strain, Debonding; Structural monitoring; Carbon Fiber Reinforced Plastic; Fiber Bragg Grating sensors.

* Corresponding author. Tel.: +91 9688676665. E-mail address: kvsajai@gmail.com

2452-3216 © 2025 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 the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.081