Parametric Analysis of Transverse Load Distribution of the Spine-Like Beam with Long Cantilever

Spine-like beam with long cantilever has been used in the application in urban bridges for its grace outline and economical efficiency. Due to the large size of the cantilever, the spatial effect should be considered during design and analysis, and the load distribution related to decks and ribs cannot be ignored. Based on the Kongcheng River bridge, the author analyzed the deformation and internal force of a series of 3D finite element models with different rib spacings and deck thicknesses. Using internal force and deflection distribution coefficients to portray the load distribution, the influence of different parameters on the coefficient was studied. Meanwhile, two regression models were proposed to estimate the load distribution status with different rib spacing or deck thickness. The internal force and deflection coefficient fitted curves have enough precision for engineering practice, hence it could provide a reference for similar practical engineering.