The effect of transverse in- plane compressive stress on the buckling strength of wide steel decks in bridges has to be considered in their design as the width of the steel deck becomes larger. Moreover, not only biaxial in-plane stresses but also wheel live loading should be considered in their design against the buckling strength of wide steel decks. However, there are no specifications for their design. This paper deals with the ultimate strength and its interaction curves of stiffened plates subjected to the biaxial in-plane compressive stresses and wheel loading for the purpose of providing reference data for developing an appropriate design method against the buckling of these wide steel decks.
