STUDY OF STEEL BEAM-COLUMN ASSEMBLY WITH REDUCED BEAM SECTION

During 1994 Northridge earthquake and 1995 Kobe earthquake, the Steel MR Frames showed poor ductility performance. The connection failure before the failure of structural members led to decrease in ductility of the structure. To increase the ductility, two concepts were developed: Strengthening the connection or weakening the beam. Reduced Beam Sections (RBS) is one of the ways of weakening the beams. RBS is a part of beam near the connection where the top and/or bottom flanges are cut thereby forcing the plastic hinge to form away from the connection. In the present study, changes in local parameters due to incorporation of RBS are studied. Two steel beam-column assemblies, one with RBS and other without RBS are considered for the study. FE analysis of both the assemblies is done in ANSYS 14.5 to see the variation in deflection of beam and in the stresses at several critical locations. Results show the benefit of using RBS in terms of stresses at beam end and Panel Zone