Abstract:Taking Beijing Tongzhou West Wenyuhe Road Bridge spanning Bahe River as an engineering example, combined with the beam grillage analysis method, the spatial beam grillage model is established. At the same time, the bending-torsional coupling effect in the space of skew bridge is considered, and the internal force and deformation of the bridge superstructure are obtained. Through the comparison with the single-beam model, the force characteristics of the skew bridge are revealed in order to provide the reference for the design of skew bridge.