PSI - Issue 64

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 757–765

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Reliability of Estimated Damage Quantity in Presence of Material

and Measurement Uncertainty Sayandip Ganguly a , Koushik Roy b, *

a Doctoral Student, IIT Patna, Patna 801106, India b Assistant Professor, IIT Patna, Patna 801106, India

Abstract The application of any existing damage quantification techniques requires validation through several real case studies to ensure a higher level of reliability. Absence of such extensive studies presents a limitation to successful implementation of these methods in practical scenarios. A reliability study is hence performed in this work considering material and measurement uncertainties to bridge this gap. The novelty of this study lies in determining a confidence bound of modal parameter-based closed-form expressions of damage quantity in a shear building. To achieve this, at first, a 10-story shear building is numerically analyzed for three locations of damage considering a wide range of severity. Gaussian distribution is assumed to account for stiffness variation of each story at healthy and damaged states of the structure. For each sample of stiffness, damage quantity is evaluated with prevailing closed-form methods. Similarly, in presence of measurement uncertainty, computed modal displacements are varied assuming similar distribution parameters as material uncertainty. Subsequently, these modal values are employed in the formulations of damage quantification. The effect of material and measurement uncertainty propagation on the reliability of estimated damage value is then examined and correlated with the numerical observations. Experimental investigation and validation with real dataset may be considered as the future scope of this study. © 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: Modal response; damage quantity; reliability; uncertainty; shear building © 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. E-mail address: koushik@iitp.ac.in

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 10.1016/j.prostr.2024.09.341