Nonlinear Analysis of Externally Prestressed Reinforced Concrete Beams with Varying Deviators and Tendon Configurations

This paper investigates the effects of deviators and tendon configurations on the response of externally prestressed beams using nonlinear finite element analysis (NLFEA). Initially, six geometrically similar externally prestressed reinforced concrete T-beams with varying deviators and tendon configurations were analysed and compared with experimental data from the literature. Additionally, a case study illustrating the application of NLFEA in predicting the response of a full- scale post-tensioned box girders used in an ongoing project in Indonesia is presented to showcase the application of advanced analysis tool in modern bridge design. It is shown that the NLFEA procedures presented in this paper can predict the detailed responses of externally prestressed beams with reasonable accuracy. This includes the gradual shifts in tendon position during loading, load-deflection responses, stress developments in external tendons, and failure crack patterns.