Abstract
The results of a new lateral load distribution formula to be applied in the analysis or design of steel girders are compared with recently published field test data as well as the current AASHTO load distribution factor method. The developed formula was the result of a study of lateral load distribution in a bridge superstructure employing the finite element analysis techniques. The finite element models were developed to represent the actual geometry of the bridge deck and analyzed to obtain a better understanding of the elastic behavior of the concrete slab-on-steel girder highway bridges. The developed load distribution formula compares well with field data in predicting the behavior of bridge superstructures under highway loadings. Therefore, this paper will assist bridge engineers and researchers in predicting the actual load distribution and bending moments in I-girder highway bridges.
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