STRENGTH AND BEHAVIOR OF ELLIPTICAL STEEL TUBE BEAMS

The main idea of this research is to study the practical efficiency of the behavior of hollow steel beam with an elliptical section, called Elliptical Hollow Steel tube Beams (EHSB), subjected to four points load. The experimental study included three models. All elliptical steel beams experimentally tested under static load to find out the essential behaviors of beams. The chosen measurable factor that were adopted in the study is diameter to thickness ratio (Aspect Ratio). The concentrated applied load versus mid span deflection curve was plotted, the strain for each beam at four places of the examined beams have been measured by strain gauge along the length of beam at bottom face under load, at bottom face at center, middle center, and upper face at center. Test results show that the resistance of the specimen is increased as the aspect ratio is increased and the ductility decreased as aspect ratio is increased