IAStructE – IIIT Hyderabad student’s chapter of Earthquake Engineering Research Centre, conducted an online Guest Lecture on the topic “Probabilistic Framework for Seismic Vulnerability Assessment of Aging Infrastructure Systems” on 25th August 2023 for all the M. Tech and Ph.D. students, structural engineers, faculty, academic and research fraternity. Dr. Shivang Shekhar, currently working as an Assistant Professor in School of Civil and Environment Engineering at IIT Mandi. He provided valuable insights into the modelling of deterioration in Reinforced Concrete (RC) structures, explaining the various stages of corrosion and their underlying mechanisms. The presentation encompassed a comprehensive exploration of both primary and secondary effects associated with corrosion across different stages. The speaker delved into the topic of bridge deterioration with an emphasis on modelling bearing deterioration and conducting seismic fragility analyses. These assessments aimed to predict potential bridge failures while accounting for uncertainties stemming from material properties, structural modelling, and the progression of deterioration. The talk also encompassed an in-depth exploration of time-dependent seismic fragility assessment, with a step-by-step walkthrough of each assessment phase. During the session, a case study involving the evaluation of a double-deck bridge model was showcased, followed by a thorough review of the assessment's findings and conclusions. The discussion extended to the utilization of parameterized fragility models for the presented case study, with a detailed breakdown of each procedural step along with screening the parameters and various analysis modes undertaken to understand the vulnerability assessment of aging bridges. The webinar concluded with a highly insightful discussion involving active participation from the attendees, contributing to the overall depth and breadth of the topic's exploration.