PERILAKU BALOK-T JEMBATAN DENGAN PELAT BAJA SEBAGAI PERKUATAN LENTUR

Abstract

Abstract: Behaviour of T-beam of bridge with steel plate as flexural strengthening. Some research about reinforced concrete beams strengthened by external steel plate have been conducted previously. Almost all research used rectangular beams as model. The aim of this research is to obtain the effectiveness of addition of external steel plate as flexural strengthening on T-reinforced concrete beam of bridge. This research uses model of beams with length ratio of 1 : 4 to prototype beams which refer to one of standard bridge of Bina Marga. Parameter which was measured in this research were deflection, initial crack load and crack width. The result shows that (1) the 15 m long of T-beam of Bina Marga Standard remain strong to resist ultimit load according to BMS 1992; (2) the addition of strengthened plate increased stiffness and initial crack load of beam, and decreased crack width of beam; and (3) the failure of beams with or without strengthening was shear failure which was not as expected.

Keywords

• balok-T
• pelat baja
• perkuatan lentur
• lendutan
• beban retak pertama
• lebar retak