NONLINEAR PUSHOVER ANALYSIS OF PRESTRESSED CONCRETE BEAM

Abstract

This study investigated nonlinear pushover analysis of prestressed concrete beam using the DIANA FEA (Finite Element Analysis ) software that embraces 1D, 2D, and 3D modeling methodologies. In engineering structures, the use of prestressed concrete is indispensable because it remarkably enhances the load-carrying capacity by imposing precompression that reduces tensile stresses, which can lead to cracking and deflection.Study investigates the behavior of prestressed concrete beams, focusing on load-displacement relationship and crack propogation. A case study examined the accuracy of the numerical simulations with respect to the empirical results by comparing different modeling methodologies using experimental studies from a case study performed earlier. The research also points out that tendon configuration, prestress magnitude, and concrete durability are some of the main factors that determine the beam functionality. The results show that there is good agreement between the experimental data and numerical predictions for all three modeling approaches (1D, 2D, and 3D) in representing the load-displacement characteristics and the mechanisms of crack initiation, which represents the reliability of numerical models in predicting the structural response. This research will contribute to better decision making regarding modeling techniques and, consequently, help provide better structural integrity and safety in engineering projects.