Study on Shear-Lag Effect of Steel–UHPC Ribbed Slab Composite Structures Using Bar Simulation Method

Recently, Ultra-High Performance Concrete (UHPC) has attracted increasing attention in civil engineering. Numerous steel–UHPC composite structures have been constructed around the world. The proper consideration of shear-lag effect a significant influence on safety structures. In view ribbed slab structure (SU-RSCS) elastic stage, theoretical calculation model based bar simulation method is first developed. Then, feasibility and accuracy that are verified using both experimental data numerical simulation. Moreover, many factors (including width-to-span ratio, ratio rib height to UHPC layer thickness, width spacing, number transverse ribs) parametrically investigated further investigate structural proposed method. addition, orthogonal analysis applied determine sensitivity each parameter effect. parametric interactions also considered. At last, comparison between results specifications discussed. show approach can accurately predict SU-RSCSs stage. It found great effect, while ribs no that.