Published Paper Details:

The main objective of this research is to study the effect of curvature on the shear distribution factor under the effect of AASHTO LRFD HL-93 live load for horizontally curved concrete box girder through an experimental program. The main variables considered in this study were the degree of curvature, the location of live load application and the number of the loadedlanes, under the variables the girder support reaction was measured by load cell connect to weigh indicator. The load cells and weight indicator allow calculating the shear distribution factor (SDF) according to the equilibrium method based on the girders support reaction under any load case and compared with AASHTO LRFD formulas for cast in place concrete box girder. The experimental results showed that the SDF does not affect with slight degree of curvature variation and the number of loaded lane under different radius of curvature for the exterior girder). The AASHTO formula overestimates the SDF for interior girder by 35 % for straight model and overestimate by 10% for model with (100) angle of curvature while the ASHHTO present conservative estimation for models with angle of curvature .