Analytical Behavior of Steel Hybrid Girder with Opening in Web

When plate girders are made up using plates of different strength in flanges and web, they are called hybrid plate girders. Increased use of hybrid beams is a condensing cost of steel structure and enhances the load-carrying capacity. The flanges are made of high-performance steel (HPS) of grade 460 Mpa and a web of lesser grade 345 Mpa. The analytical test has been carried out on twelve I-shaped girders in which six with a hybrid and six with a homogenous section. The analysis has implemented three-dimensional nonlinear finite-element models. Finite-element modeling of steel girder with or without opening is studied using ANSYS 12.0. The high-performance steels (HPS) have excellent stiffness and weldability, crack resistance features with having high yield strength. The analytical models consist of steel girders with a hexagonal web opening, without opening reinforcement. Opening in the beam is adaptable for its high strength to weight ratio and increase in depth of section without any further weight. So, that lighter section can be considered with consequent cost saving. Results are presented in terms of load–deflection behavior, failure mode and von Mises stress concentration. From the analytical results, it has been observed that the hybrid girder has a higher load-carrying capacity when compared with homogenous specimens.