Plastic Analysis for Beams and Portal Frames

Traditional elastic design often underestimates the true load-carrying capacity of ductile steel structures. Understanding plastic analysis allows structural engineers to predict the actual collapse mechanisms of beams and frames, leading to safer and more material-efficient designs. This course guides you from the fundamental definitions of plastic hinges and shape factors to the complete collapse analysis of complex structures. You will gain the confidence to calculate collapse loads for both sway and non-sway frames using systematic analytical methods. What you will learn: - Understand the core concepts of plastic theory, including plastic hinges, shape factors, and yield criteria. - Calculate the plastic moment capacity for various structural cross-sectional shapes. - Analyze continuous beams to determine collapse mechanisms and ultimate load-carrying capacity. - Evaluate portal frames under both sway and non-sway conditions using the mechanism method. - Apply the upper and lower bound theorems of plastic analysis to verify structural safety. - Relate plastic analysis principles to modern limit state design standards and structural codes. You will start with basic material behavior and cross-sectional properties before moving step-by-step through beam mechanisms, joint analysis, and frame behavior. This text-based course is designed for civil and structural engineering students, junior engineers, and construction professionals looking to master plastic design principles from the ground up. Start reading today to unlock a deeper understanding of structural collapse behavior and modern plastic design.