STUDI ANALISIS ELEMEN HINGGA PENGARUH RASIO DIAMETER TERHADAP KETEBALAN PADA KEKUATAN LENTUR DAN GESER BALOK STRUKTUR BERONGGA BUNDAR

Abstract

Buildings built by steel materials began to be widely used in Indonesia. Circular Hollow Section (CHS) is generally used as column elements and can also be used for beam elements. This study aims to perform a parametric study analysis of the effect of D/t on the flexural and shear behavior of CHS beams using the MSC Marc/Mentat software. The results of the finite element analysis of CHS beams show that the CVSt32 beam (D/t=35,72) shows a greater maximum load response than the CVSt12 beam (D/t =92,25) and also the CVSt07 beam (D/t =163,28). The maximum load response of beams loaded with pure bending (one point) produces a maximum load of 50% more than the maximum load response of beams loaded with a combination of bending and shear (two points). The maximum deflection response of a beam with D/t =35,72 which is loaded with pure bending (one point) produces a greater maximum deflection compared to beams with D/t =92,25 and D/t =163,28. The smaller the D/t both the pure bending beam (two points) and the beam loaded with a combination of bending and shear (one point) produce a greater deflection compared to the larger D/t beam. The phenomenon of local buckling in a beam loaded with one point will cause the maximum load that can be supported by the beam loaded with two points (pure bending). The SNI calculated moment capacity is greater than the finite element analysis result and the calculated shear force (V_n) is greater than the finite element analysis result (P_max/2).