PSI - Issue 52

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Procedia Structural Integrity 52 (2024) 487–505 Structural Integrity Procedia 00 (2022) 000 – 000

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2452-3216 © 2023 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 Professor Ferri Aliabadi 10.1016/j.prostr.2023.12.049 2452-3216 © 2023 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 Professor Ferri Aliabadi 2452-3216 © 2023 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 Professor Ferri Aliabadi © 2023 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 Professor Ferri Aliabadi Abstract Railway bridges are vital components of transportation infrastructure, exposed to various forces including vertical and horizontal loads. Withstanding increasing axial loads is a critical factor in railway bridge design and operation, and has been the subject of research for many years. Numerous studies have investigated the impact of axial loads on bridge behavior and developed models to forecast their response under different load conditions. This study focused on evaluating the load-carrying capacity of box-type concrete bridges, which were designed to carry a load of 21 MT, to withstand an increased axle load of 25 MT. To achieve this, Operational Modal Analysis (OMA) and finite element analysis were utilized to assess the bridges. Dynamic properties of the system were estimated by recording vibration data using wireless accelerometer sensors, while finite element analysis was developed from Visual Inspection and Non-Destructive Test (NDT) results and then paired with the OMA results. Additionally, the study estimated the maximum load-carrying capacity of the existing through numerical Analysis. To test the methodology, the study was conducted on five real-time bridges at a constant train speed of 10 Kmph. Results showed that all five bridges were capable of withstanding the increased axial load at that speed. Therefore, this study has demonstrated the effectiveness of this technique in predicting the behavior of structures under heightened dynamic loads. Keywords: Operational Modal Analysis, axel Loads, wireless accelerometer sensors, railway bridges, finite element analysis, NDT. 1. Introduction and Background Railway bridges (RBs) play a critical role in the transportation infrastructure of India, enabling goods and people to move across the country and promoting trade and commerce across diverse areas. Sharma et al. (2021) acknowledge the vital contribution RBs have made to India's economic progress. Additionally, RB construction and maintenance Abstract Railway bridges are vital components of transportation infrastructure, exposed to various forces including vertical and horizontal loads. Withstanding increasing axial loads is a critical factor in railway bridge design and operation, and has been the subject of research for many years. Numerous studies have investigated the impact of axial loads on bridge behavior and developed models to forecast their response under different load conditions. This study focused on evaluating the load-carrying capacity of box-type concrete bridges, which were designed to carry a load of 21 MT, to withstand an increased axle load of 25 MT. To achieve this, Operational Modal Analysis (OMA) and finite element analysis were utilized to assess the bridges. Dynamic properties of the system were estimated by recording vibration data using wireless accelerometer sensors, while finite element analysis was developed from Visual Inspection and Non-Destructive Test (NDT) results and then paired with the OMA results. Additionally, the study estimated the maximum load-carrying capacity of the existing through numerical Analysis. To test the methodology, the study was conducted on five real-time bridges at a constant train speed of 10 Kmph. Results showed that all five bridges were capable of withstanding the increased axial load at that speed. Therefore, this study has demonstrated the effectiveness of this technique in predicting the behavior of structures under heightened dynamic loads. Keywords: Operational Modal Analysis, axel Loads, wireless accelerometer sensors, railway bridges, finite element analysis, NDT. 1. Introduction and Background Railway bridges (RBs) play a critical role in the transportation infrastructure of India, enabling goods and people to move across the country and promoting trade and commerce across diverse areas. Sharma et al. (2021) acknowledge the vital contribution RBs have made to India's economic progress. Additionally, RB construction and maintenance Fracture, Damage and Structural Health Monitoring Experimental and Numerical Investigation of Axial Load Capacity for Box-type Railway Bridges Govardhan Polepally a *, Sairam Neridu a , Venkata Dilip Kumar Pasupuleti a , Prafulla Kalapatapu a a Ecole Centrale School of Engineering, Mahindra University, Hyderabad, India Fracture, Damage and Structural Health Monitoring Experimental and Numerical Investigation of Axial Load Capacity for Box-type Railway Bridges Govardhan Polepally a *, Sairam Neridu a , Venkata Dilip Kumar Pasupuleti a , Prafulla Kalapatapu a a Ecole Centrale School of Engineering, Mahindra University, Hyderabad, India * Corresponding author. Tel.: +91 9059620623. E-mail address: govardhan20pcie009@mahindrauniversity.edu.in * Corresponding author. Tel.: +91 9059620623. E-mail address: govardhan20pcie009@mahindrauniversity.edu.in