Finite element studies on the flexure-shear behavior of steel and hybrid fiber reinforced prestressed concrete beams
- Vol.95(1), Jan
- Thane ACC LTD 2021
- 58-70p.
The flexure-shear behavior of steel and hybrid fiber reinforced prestressed concrete beams are studied in three-dimensional nonlinear finite element analysis. Test results of a prestressed concrete beam were simulated using finite element software ABAQUS. The volume fraction of the steel fibers (SF) and hybrid (HB) fibers are the main variables considered in this study. The other parameters such as the cross-section area of concrete, longitudinal reinforcement ratio and shear span to depth ratio were kept constant. The concrete behavior was simulated through the concrete damage plasticity (CDP) model. The loading and boundary conditions in the FE models were kept similar to that of experimental testing. The load-deflection response, ductility, and failure modes of the beams were predicted well. During the experimentation, the crack initiation, crack propagation was traced by digital image correlation (DIC) technique. An increase in the volume fraction of fibers increased the flexure capacity and ductility. Around 109% and 89% improvement in ductility is observed at 1.0% volume fraction of steel and hybrid fibers, respectively.