Abstract
One alternative in the modelization of steel structural elements is the castella steel beam. This study aims to determine the strength and stability of the normal castella beam due to static loading, cyclic loading and know the damage model of the two types of loading. In this research used normal steel beam IWF 200.100.8.5,5; normal profile steel beams modified into castella steel beams and composite castella steel beams, with hexagonal opening forms, 0.6H aperture height, 9 cm opening distance and 60° opening angle. The results of this study indicate that the moment capacity of composite castella beam with cyclic loading increased 475% from castella beam with static loads. While the load capacity on castella beam with static load increased 152% from composite castella beam with cyclic load. The deflection occurring in the composite castella beam with cyclic loading increased 399% from castella beam with static load. The collapse mechanism of the castella beam with static load is the lateral-torsional buckling and web-buckling. While the collapse mechanism on the composite castella beam with cyclic load is cracked on the concrete stuffing. This shows that the model of composite castella beam can be applied to structures built on earthquake-prone areas.
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