The Substantiation of Steel-Reinforced Concrete Composite Bridge Superstructure Design

The article presents the calculation of a composite reinforced concrete bridge superstructure 42 meters long and 15.9 meters clear width, taking into account the layout cross-section zero axis position correction. It is assumed to pair the concrete slab of the carriageway and the steel main beams along the neutral axis of the section, at the same time reinforced concrete will perceive only compressive forces, and the steel main beams will perceive only tensile forces. Steel beam and reinforced concrete slab are included in the work at the same time and together perceive internal forces from permanent and temporary loads. The bridge superstructure consists of composite steel reinforced concrete blocks, which are prefabricated and combined at the construction site. To ensure the simultaneous inclusion in the work of the whole cross-section, the installation of the bridge superstructure structure by means of a hinged method or on solid scaffolding is provided.