Abstract
This paper presents reduced beam section (RBS) technique on castellated beam. Aim of this study is to ensure the plastic moment reach far from column face without significant of strength decreasing. Four models of castellated beam with various types of RBS and one model without RBS have been considered. ABAQUS FEA software package was used for modelling purpose. Loading condition, i.e. lateral load as representing earthquake load, was monotonic load using displacement control at the top of the column. The result shows that the maximum load and the maximum displacement with RBS and without RBS do not portray significant difference. The maximum load RBS castellated beam and without RBS were respectively 86.17 kN and 80.63 kN. It is indicated that the RBS on castellated beam might share relatively similar maximum load compared to non RBS castellated beam and the RBS can secure the stress concentration and plastic moment, the location of which is far from the column face. The reduced beam section (RBS) is put on beam-to-column moment connected on castellated beam.
Highlights
The various number of research activities has been conducted on the behavior of fully restrained steel connections in light of the 1994 Northridge earthquake, which some has emphasized on the Reduced Beam Section (RBS) moment connection
At 28 cm from column face (CRBS-1), it performs best result model compared with CRBS-2 and CRBS-3
Four models of castellated beam with one type of non reduced beam section (RBS) and three various types of RBS were conducted in this study
Summary
The various number of research activities has been conducted on the behavior of fully restrained steel connections in light of the 1994 Northridge earthquake, which some has emphasized on the Reduced Beam Section (RBS) moment connection. As regards the castellated beam connection, the RBS is denoted by a circular radius cut in both top and bottom flanges to reduce the flange area and the plastic moment capacity over a length of the beam near the ends of the beam span. This connection was developed to assure greater reliability of steel beam-to-column connections. In an effort to gain additional insight into the behaviour of the tested specimens, this research investigates castellated beam reduced beam section (RBS) moment connection models by performing simulation on the computer program ABAQUS
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