THE INFLUENCE OF VEHICLE AXLE CONFIGURATION AGAINST BACK AND MAXIMUM DEFLECTION DUE TO EXCESSIVE LOAD WITH BENKELMAN BEAM TOOLS
he cause of early damage to road sections in Indonesia is still a matter of debate among expert and road expert. But it was pointed out that many parties that these early damages were likely caused by the age of the road plan that had been passed, the puddle of water on the road surface that could not flow due to poor drainage, excessive overloaded traffic loads which caused more road life short of planning. The research was carried out on the local road which was assumed to represent the condition of the thickness of the flexible pavement layer, with one hope that it could be known the reverse deflection and maximum deflection on the road section. The research was conducted by looking at the back deflection and the maximum deflection that occurred due to variations in loading and variations in commercial vehicle axle configuration. Vehicle axle configurations used in this research is Single Axle Dual Wheel (SADW), Single Axle Single Wheel (SASW) and Dual Axle Tandem Wheel (TADW). SADW and SASW are represented by Truck 1.2 H, TADW is represented by Truk 1.22. The results of the research, data analysis and calculation process obtained the maximum deflection magnitude right on the vehicle axle (∆mc) can
be determined by making a deflection ratio, Dm30 = Dmc , so that it is obtained Dmc = Dm30 ́Drc , because of the Dr30 Drc Dr30
magnitude (∆m30 = p x ∆r30) and magnitude (∆rc = q x ∆r30), then the magnitude Dmc = (p ́Dr30 )(q ́Dr30 )= p ́q ́Dr30. For reverse deflection value, SADW with vehicle load 14.24 tons and ∆rc
1,05mm, and TADW with vehicle load 16.73 tons and ∆rc 0,48mm , for maximum deflection value SADW 14.24 tons ∆mc 1,18 mm, TADW 16,73 ton ∆mc 0,58 mm and maximum deflection for PSADW Single Axle Single Wheel
(SASW) PSADW 14,24 ton PSASW 4,62 ton D = D ́ P = 0,27 mm.