PSI - Issue 52

ScienceDirect Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Procedia Structural Integrity 52 (2024) 267–279

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© 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 The Stock of existing bridges in India performs insufficiently in terms of structural safety and functionality and exhibits signs of distress arriving as early as 10 years of construction which is a point of concern. Identifying the cause and level of distress along with appropriate retrofitting techniques can avoid catastrophic damage. One such case is presented in the present study where a newly constructed twin culvert bridge exhibits signs of distress to which evaluation of the overall condition of the structure including its integrity, and stability has been performed. This evaluation determines whether repairs or rehabilitation are needed and prioritizes which bridge Component should be addressed first. The assessment process typically involves visual inspections, non-destructive testing, and laboratory analysis of concrete samples. The mid-pier wall of the structure has three vertical cracks, which raises questions about the structure's ability to support loads and remain operational. Using non-destructive and semi destructive testing, it was discovered that the vertical cracks had spread throughout the wall's thickness. A numerical model is created based on the information gathered from the Non-Destructive testing, and it is found that the present load-carrying capability is 40 – 45% less than the design service load. Therefore, appropriate retrofitting techniques have been used to increase the load bearing capability to accommodate service loads. The challenges faced during the retrofitting process by the engineers and execution team are also discussed. Abstract The Stock of existing bridges in India performs insufficiently in terms of structural safety and functionality and exhibits signs of distress arriving as early as 10 years of construction which is a point of concern. Identifying the cause and level of distress along with appropriate retrofitting techniques can avoid catastrophic damage. One such case is presented in the present study where a newly constructed twin culvert bridge exhibits signs of distress to which evaluation of the overall condition of the structure including its integrity, and stability has been performed. This evaluation determines whether repairs or rehabilitation are needed and prioritizes which bridge Component should be addressed first. The assessment process typically involves visual inspections, non-destructive testing, and laboratory analysis of concrete samples. The mid-pier wall of the structure has three vertical cracks, which raises questions about the structure's ability to support loads and remain operational. Using non-destructive and semi destructive testing, it was discovered that the vertical cracks had spread throughout the wall's thickness. A numerical model is created based on the information gathered from the Non-Destructive testing, and it is found that the present load-carrying capability is 40 – 45% less than the design service load. Therefore, appropriate retrofitting techniques have been used to increase the load bearing capability to accommodate service loads. The challenges faced during the retrofitting process by the engineers and execution team are also discussed. Keywords: Twin Culvert Bridges, Non-Destructive Testing, Retrofitting Techniques, Numerical Analysis ; Fracture, Damage, and Structural Health Monitoring Distress Diagnosis and Retrofitting of Twin Culvert Bridge Sairam Neridu a * , Rakesh Katam a , Govardhan Polepally a , Ajay Kumar Sreerama b , Venkata Dilip Kumar Pasupuleti a , Prafulla Kalapatapu a a Ecole Centrale School of Engineering, Mahindra University, Hyderabad, India, b Mantis Infra Solutions Pvt Ltd, Hyderabad, India. Fracture, Damage, and Structural Health Monitoring Distress Diagnosis and Retrofitting of Twin Culvert Bridge Sairam Neridu a * , Rakesh Katam a , Govardhan Polepally a , Ajay Kumar Sreerama b , Venkata Dilip Kumar Pasupuleti a , Prafulla Kalapatapu a a Ecole Centrale School of Engineering, Mahindra University, Hyderabad, India, b Mantis Infra Solutions Pvt Ltd, Hyderabad, India.

Keywords: Twin Culvert Bridges, Non-Destructive Testing, Retrofitting Techniques, Numerical Analysis ;

* Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: sairam20pcie004@mahindrauniversity.edu.in

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.2023.12.028 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 * Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: sairam20pcie004@mahindrauniversity.edu.in