ABSTRACT
ABSTRACT: Good maintenance of a bridge requires the information on traffic loads. A method of estimating the traffic loads is bridge-weigh-in-motion (BWIM).The conventional BWIM is based on the strains of main girders. To obtain supplemental information of truck velocity, the strains of transverse stiffeners are measured additionally. Our previous research has shown that truck loads could be estimated solely by the strains of transverse stiffeners, provided that the transverse stiffeners were chosen carefully. The method is superior, since the strain measurements of main girders are no longer necessary. The method involves the integration of time-history response of strain and is called BWIM by Integration Method with Transverse Stiffeners (BWIM-IT). In the present study, BWIM-IT is extended to the estimation of axle loads. Good results are obtained if the influence of the truck in the adjacent lane is removed from the strain data.
