Pemodelan Prototipe Balok-T Jembatan Standar Bina Marga Dengan Pelat Baja Sebagai Perkuatan Lentur
Abstract
Modeling the strengthening of external T-beam bridge of Bina Marga standard by steel plate in the attracting side was done by applying finite elements based program, that is FEA LUSAS. As many as 12 T-beam bridge models were modeled by applying two dimension elements with the length of span 10, 15, 20, and 20 meters. Every span of T-beam was modeled into three finite element model, one model was without steel plate which is used as a control model and two other models were with steel plate.
Three points loading with a simple supported (pin-roll) was conducted to T-beam model, it is based on the roles of BMS. The strengthened beam was analyzed using four type of plate thickness 4,0 mm, 6,0 mm, 8,0 mm and 10,0 mm with consistence of gluing thickness of 3,0 mm. Beam modeling, glue and plate was modeled by surface element, while beam reinforcement was modeled by bar element. Deflection behavior was investigated in the rate of loading states, that is from the first loading 1 kN by increasing the loading as big as 1 kN until it reached permitted down buckling L/800. The result of down loading-deflection relation was plotted in the form of diagram while crack pattern was shown in the form of drawing of cracked pattern.
Keywords : T-beam bridge of Bina Marga standard, Strengthening, Steel plate, FEA LUSAS modeling.
