ANALYSIS OF HORIZONTAL SHEAR FAILURE IN HOLLOW REINFORCED CONCRETE BEAMS: A FULL-SCALE EXPERIMENTAL STUDY
Along with increasing environmental damage due to the use of synthetic materials in large volumes, it has an impact on global warming, so scientists and field practitioners are innovating a lot to use environmentally friendly materials. One type of environmentally friendly concrete structure is the Hollow Reinforced Concrete Beam (HRCB) type, which is usually used as a bridge girder. This study aims to observe the process of horizontal failure of the girder due to shear stress, and analyze the causal factors, to ultimately provide a solution to minimize the failure of the girder due to the horizontal shear failure. This research was conducted with an experimental quantitative approach which was described by using the analysis of the bridge girder structure in accordance with applicable standards. Full-scale experiments were carried out on intact beams (without holes) and hollow beams. This study shows that the failure that occurs in hollow beams is horizontal shear failure, which is caused by the width of the residual beam that is insufficient to carry the main stress due to the combination of horizontal shear forces and bending stresses, which occur in the quarter span zone of the girder. This study recommends that in the use of hollow reinforced concrete girders, care must be taken in the placement of bottles (as holes), so that during casting their position does not experience displacement in the concrete cross section, which causes spalling in the cross sectional area of the girder.
Horizontal shear failure, hollow reinforcement concrete beams, spalling, shear stress, deflection.