Load Uncertainty and Modeling Methods in Reinforced Concrete Floor Systems

This paper examines the identification and quantification of load uncertainties in reinforced concrete floor systems and evaluates modeling methodologies through a comprehensive case study of a multi-story animal hospital.The research investigates static loads (dead and live loads) and their distribution according to ASCE 7 and ADIBC 2013 codes, comparing three distinct calculation methods for wall loads and analyzing the impact of uniform versus nonuniform load distributions.Through comparative analysis of Finite Element Analysis (FEA) and Strip Design Analysis (SDA), the study reveals that while both methods yield identical results for deflection and punching shear, significant differences emerge in reinforcement requirements, with SDA prescribing up to 64% higher reinforcement in the Ydirection.Case studies demonstrate that non-uniform imposed loads reduce deflection by up to 25.8% compared to uniform distributions, highlighting the critical impact of load modeling on structural behavior.The findings provide engineers with practical guidance for selecting appropriate analysis methods based on project complexity, optimizing material usage, and ensuring structural integrity while meeting safety requirements.This research contributes to more sustainable construction practices by identifying opportunities for material optimization without compromising structural performance.