A THESIS SUBMITTED TO THE FACULTY OF CIVIL ENGINEERING, INSTITUTE OF TECHNOLOGY, SCHOOL OF GRADUATE STUDIES, ARBAMINCH UNIVERSITY IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTERS SCIENCE IN STRUCTURAL ENGINEERING

Abstract

in this study span to depth ratio, loading type, shear stud configuration and shear stud diameters are the main variables under fire loading. FEA result shows that loading type of the beam has a major impact on strength of composite beams under fire loading compared to span to depth ratio, configuration of shear studs and diameter of shear studs. To be accurate, increasing the span to depth ratio of the beam by 11.02% decreased the strength of composite beams by 7.65%, changing the loading type from fire to static loading increased the strength of the beam by 8.02%, a change in the configuration of shear studs of the beam from single to double and staggered, strength of a composite beam decreased by 3.32% and 5.31% respectively. Moreover, an increase in the diameter of shear connectors by 64.29% strength of composite beam increased by 2.85%. FEA result proved that the span to depth ratio of the beam has a major impact on the stress of composite beams under fire loading compared to loading type, configuration of shear studs and diameter of shear connector. To be accurate, increasing the span to depth ratio of the beam by 11.02% reduced the stress of composite beams by 5.38%, changing the loading type from fire to static loading increased the stress of the beam by 1.69%, a change in the configuration of shear studs of the beam from single to double and staggered manner increased the stress of composite beams by 0.018% & 1.61%. In addition, an increase in the diameter of shear connectors by 64.29% increased by 0.0061%.