Load Capacities of Steel and Concrete Composite Bridge Deck Slab with Haunch

Abstract

An innovative steel and concrete composite bridge deck slab using bent bars and epoxy as shear connectors was proposed. Four slab specimens with di erent types of concrete were fabricated and tested to study the load capacities of positive and negative moment regions of the slabs. e cracking and ultimate loads of the specimens were recorded and compared with the results calculated through the reinforced concrete theory and with the design load of the bridge deck slab. It was found that reinforced concrete theory can generally be applied for the proposed slab as well. e e ectiveness of the shear connector design of the proposed slab was validated. Meanwhile, the unfavourable e ect of the haunch on the shear capacities of the positive moment region of steel and concrete composite bridge deck slab was observed.

Contribution of perforated steel ribs to load-carrying capacities of steel and concrete composite slabs under negative bending

“…In NB2 specimen, 10-mm-diameter rolled plain steel bars were bent and welded on the steel plate at a spacing of 200 mm in the transversal direction and 400 mm in the longitudinal one. At the same time, epoxy is sprayed onto the surface of the steel sheeting in order to improve the interfacial behavior between steel and concrete (Xu and Liu, 2017). In other specimens, the composite action between concrete slab and steel plate was provided by perforated steel ribs as shown in Figure 7.…”

Bending Resistance of Composite Sections with Nonductile Shear Connectors and Partial Shear Connection

“…Composite steel-concrete structures are in increasing use over the last several decades [1][2][3]. In composite beams, with typical cross sections as shown in Figure 1, composite action between the concrete slab and steel section is achieved through the shear connectors placed at the steel-concrete interface.…”