ABSTRACT
Information on actual traffic loads travelling along highways is valuable to determine maintenance scheme of bridges. The techniques that weigh trucks in motion, known as weigh-in-motion have attracted many highway engineers and researchers. One of such techniques is based on the deformation of a bridge and is called bridge-weigh-in-motion (BWIM), Although relatively inexpensive, the conventional BWIM requires the strains of transverse stiffeners for supplemental information in addition to the strains of main girders. Effort has been made to conduct BWIM only by the strains of transverse stiffeners. It was successful for truck-load estimation and then extended to estimate axle loads. By this economical axle-load estimation method, the axle loads are evaluated and analyzed. The susceptibility of the lane to fatigue is then discussed.
