Computational modeling of reinforced concrete dapped-end beams

Abstract

The structural response of reinforced concrete dapped-end beams is simulated through finite element analysis. The case study consists in experimental tests performed in the framework of an Italian research project on bridges. The study assesses both the local and global behavior of the beam and characterizes the damage patterns. A blind prediction is initially performed inputting the main basic material and geometrical properties of the specimen. Further models are developed by varying several structural parameters and modeling/analysis features, assessing their influence on the structural capacity and response of the beams. The blind model yielded relatively accurate behavior and capacity estimations. Additionally, the modeling is enhanced by accounting for experimental data. Technical and operative guidelines for implementing the numerical analysis of dapped-end beams are finally provided, in light of the critical assessment of the modeling and analysis results.