PSI - Issue 52

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

www.elsevier.com/locate/procedia

ScienceDirect ScienceDirect

Procedia Structural Integrity 52 (2024) 280–292 Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia

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.2023.12.029 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 Masonry bridges, being the oldest form of structural type in Indian railway bridge networks, the need to address its structural safety for modern loading conditions is of primary importance. The engineering community faces challenges in determining the stability and capacity of these structures subjected to increasing traffic demands and speeds. Although various methods have been developed over the years to assess the condition of masonry bridges but there isn’t any established methodology in the literature that can determine the load-carrying capacity and remaining lifespan of these structures. This study presents an approach to evaluate the structural integrity of a 93-year-old railway bridge in India. The bridge consists of 44 steel spans 24.4m long each and 13m tall stone masonry piers supported by well foundations. The bridge spans are being evaluated through the use of wireless accelerometer sensors where their dynamic characteristics are analyzed by capturing vibrations caused by ambient sources such as hammer strikes and human jumps. Further, a numerical model has been modeled and used to compare its modal frequency from the experimental testing across different spans. At the footnote, conclusions were drawn in identifying the weaker or deteriorating piers. Keywords: Masonry Bridges, Railway bridges, Condition Assessment, Wireless accelerometer Sensors, Numerical Analysis, Modal analysis. 1. Introduction Masonry is a heterogeneous and anisotropic material that has been a construction material for centuries, and it remains one of the oldest building materials still in use today (Sarhosis et al., 2018). Many railway and roadway bridges around the world are built using masonry, with some of them still in functional. For example, in Europe, about 40% of railway bridges and 25% of roadway bridges are built by masonry (Bell, 2004; Helmarich et al., 2012), while in Turkey and Spain, the numbers are approximately 40% and 45%, respectively (Gonen et al., 2021; Abstract Masonry bridges, being the oldest form of structural type in Indian railway bridge networks, the need to address its structural safety for modern loading conditions is of primary importance. The engineering community faces challenges in determining the stability and capacity of these structures subjected to increasing traffic demands and speeds. Although various methods have been developed over the years to assess the condition of masonry bridges but there isn’t any established methodology in the literature that can determine the load-carrying capacity and remaining lifespan of these structures. This study presents an approach to evaluate the structural integrity of a 93-year-old railway bridge in India. The bridge consists of 44 steel spans 24.4m long each and 13m tall stone masonry piers supported by well foundations. The bridge spans are being evaluated through the use of wireless accelerometer sensors where their dynamic characteristics are analyzed by capturing vibrations caused by ambient sources such as hammer strikes and human jumps. Further, a numerical model has been modeled and used to compare its modal frequency from the experimental testing across different spans. At the footnote, conclusions were drawn in identifying the weaker or deteriorating piers. Keywords: Masonry Bridges, Railway bridges, Condition Assessment, Wireless accelerometer Sensors, Numerical Analysis, Modal analysis. 1. Introduction Masonry is a heterogeneous and anisotropic material that has been a construction material for centuries, and it remains one of the oldest building materials still in use today (Sarhosis et al., 2018). Many railway and roadway bridges around the world are built using masonry, with some of them still in functional. For example, in Europe, about 40% of railway bridges and 25% of roadway bridges are built by masonry (Bell, 2004; Helmarich et al., 2012), while in Turkey and Spain, the numbers are approximately 40% and 45%, respectively (Gonen et al., 2021; * Corresponding author. Tel.: +91 9059620623. E-mail address: govardhan20pcie009@mahindrauniversity.edu.in Fracture, Damage and Structural Health Monitoring Model-driven structural health assessment of Masonry Bridge: A Preliminary Study Govardhan Polepally 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 Model-driven structural health assessment of Masonry Bridge: A Preliminary Study Govardhan Polepally 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