抄録
For constructing a good maintenance scheme of an existing bridge, the methods for estimating the weights of heavy trucks are needed and Bridge Weigh-In-Motion (BWIM) has attracted many researchers. For the accuracy of this method, the usage of a short simply-supported straight steel bridge is preferred. However, the highway of our interest does not havc stccl bridges except the one that is a continuous skew plate-girder bridge. Because of this, we first investigate the accuracy of BWIM carefully when applied to this bridge: we use three trucks of known weights and carried out 5 different patterns of running test. Each pattern comprises multiple cases with different running conditions. Using strains obtained in this running test, we conduct BWIM and estimate thick weights. It is found that the error of a truck weight is less than 5% when a single truck is running while it can be up to 11.7% when two trucks are running. The influence of the number of data pints on the accuracy of WIM is also studied. From a practical point of view, this much of error is acceptable. The usage of a continuous skew steel-plate-girder bridge for Bridge Weigh-In-Motion can be justified
