Performance of Steel Beams with Circular Openings under Static and Dynamic Loadings

Abstract

In modern structural constructions and high rise buildings, the one of the most important consideration is the efficient design of long span floor composite system and girder beams with web opening. For minimizing the cross sectional of these members, reducing the dead load and cost wise of construction steel beams, web openings are necessary and the floor beams acts compositely with slabs. This study is focused on the performance of floor steel beam with circular web perforation subjected to line loading and on the evaluation of shear buckling capacity for such beams under the effects of static and dynamic loadings. The adopted parameters are web to thickness ratio and web perforation size. Numerical analysis method as finite elements approach by ANSYS software is taken to simulate all models and presented as three dimensional problems. The analysis results indicate that the presence of web perforations reduced the shear strength capacity and increased the deflection, and the configuration of tension field were changed. In case of dynamic loadings, the study showed that the magnitude of deflections is effected by the frequency of the applied external load and varied with respect to the magnitude of the frequency.