DefinePK

Abstract

In this research work a hybrid prestressed composite beam with embedded I-section is designed and is been tested and compared with prestressed concrete beam and composite beam with embedded I-section under flexural strength in a high grade concrete of M35. Concrete which is generally a low tensile capacity material due to which cracks are formed on the surface of the higher grade concrete due to many conditions like heavy loading, dry shrinkage etc. In order to avoid this cracking steel reinforcement are introduced in the beams and thereby increasing the tensile capacity. In general, longer span sections induce larger bending moment thereby increasing the beam depth which becomes inconvenience to the user. Hence, a section with much lesser depth will be possible by introducing prestress to the concrete. In some critical cases a section depth will be restricted due to some local case to case basis. In those cases a concrete section with embedded steel section or a concrete section with embedded steel section with prestress may be of great help in reducing the depth of the section. Hence, an attempt has been made to study the concrete section with embedded steel section with and without prestressing and compared with conventional prestressed concrete beam. The results show that the energy absorption capacity of the section is increased by 152.5% by using embedded steel section in concrete and 227.7% by using embedded steel section with prestressing in concrete when compared to conventional prestressed concrete beam.