PSI - Issue 64

Abdalla Elhadi Alhashmi et al. / Procedia Structural Integrity 64 (2024) 1990–1996 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 4. RFE results: a) random field realization sample; b) resistance histogram

5. Conclusion This paper presents the application of a novel computational framework for the evaluation of existing reinforced concrete (RC) structures, incorporating both material (i.e., aleatoric) and geometric (i.e., epistemic) uncertainties. Material uncertainties are considered by generating random properties to develop resistance histograms for degraded members, employing the random finite element approach (RFE). Geometric uncertainty was addressed by mapping real-life crack images into FE models via Digital Image Processing (DIP) techniques. DIP methods are utilized to process and convert the image into a binary format. The binary matrix data is then transformed and integrated into FE models as geometric information using MATLAB-Python scripts. The robustness and applicability of the proposed methodology was validated through a case study of corroded concrete column from existing literature. The application of the suggested methodology resulted in a 20% improvement in the overall performance when comparing the damaged to its undamaged counterpart. The generated resistance model demonstrated a coefficient of variation (COV) of 4%, consistent with the findings of RFE analysis reported elsewhere in the literature. The research findings highlight the reliability and efficacy of the proposed approach in assessing the structural safety of existing concrete structures. Acknowledgements The authors would like to thank Dalhousie University and Mathematics of Information Technology and Complex Systems (Mitacs) and Norlander Oudah Engineering Ltd (NOEL) for supporting this research program. Reference “ABAQUS.” 2021. Providence, RI, USA: Dassault Systèmes Simulia Corp. Abdelmaksoud, A. M., F. Oudah, I. Nikolaidis, S. Adeeb, and S. Attia. 2024. “A fuzzy -random fields approach for assessing the natural frequencies of corroded pipes conveying fluids.” Eng Struct, 306. Elsevier Ltd. https://doi.org/10.1016/j.engstruct.2024.117823. Alhashmi, A., and F. Oudah. 2024. “Structural assessment of cracked concrete members by digital image random nonlinear finite element.” ACI Struct J. Under review Bartlett, F. M., H. P. Hong, and W. Zhou. 2003. “Load factor calibration for the proposed 2005 edition of the National Buildi ng Code of Canada: Statistics of loads and load effects.” Canadian Journal of Civil Engineering, 30 (2): 429– 439. https://doi.org/10.1139/l02-087. Botte, W., E. Vereecken, and R. Caspeele. 2023. “Random field modelling of spatial variability in concrete–a review.” Structure and Infrastructure Engineering. Taylor and Francis Ltd.