Performance of the Composite Bridge Deck with Concrete Slab and Orthotropic Steel Plate with Tshape Stiffener

Abstract:

In order to check the performance of the new type of composite bridge deck proposed in this paper under the wheel load and its performance in the second system of the bridge deck, also to compare it with the performance of the normal bridge deck, 4 different types of bridge deck are designed and fabricated, one is concrete bridge deck, one is orthotropic steel bridge deck, and the other two are composite bridge decks with concrete slab and orthotropic steel plate with Tshape stiffener in different sizes. Static load test is conducted on these specimens to shed light on the cracking of concrete in the negative moment zone and measure the deformation and the strains in different locations on the decks. The result proves that the local stress level of the composite bridge deck is less than that of the orthotropic steel bridge deck, the loadcarrying capacity of the composite bridge deck in unit width is at least 2.36 and 1.57 times as many as that of the concrete deck and orthotropic steel plate deck, respectively, which, further validate that the composite bridge deck proposed in this paper has a higher fatigue strength.