Mechanical Performance Of Corrugated Steel Plate And Concrete Composite Structure Bridge Deck

Nowadays, the highway transportation overloading problem is serious. It can cause bridge service life reducement, especially the bridge decks damage. To overcome the shortcoming of shear capacity of the traditional type of bridge decks, a new structure formed by corrugated steel plate and concrete composite structure bridge decks is introduced. On the basis of the orthotropic steel bridge decks, it takes corrugated steel as the baseplate of the concrete. Taking the Huai Nan Kong Li Huai He Bridge in Anhui Province as the real example, this thesis analyzed the mechanical behavior and carried out the parameter studies on the bridge decks with corrugated steel plate. The outcomes are of helps to the engineering design and service maintenance for such a bridge deck.The thesis contains four main parts as follows:1. The overall model of the the Huai Nan Kong Li Huai He Bridge to analyze the static force under different load combinations is built first, it comes to the conclusion that the maximum bending moment occurs in the middle of the midspan under the secondary permanent load and full load combination.2. The partial model is built to analyze the mechanical behavior and the effect on the bridge decks with corrugated steel plate using the submodeling method considering the material nonlinearity of concrete, corrugated steel plate and rebar, the contact nonlinearity between concrete and corrugated steel plate. Results show that corrugated steel plate can greatly improve the flexural capacity and stiffness, the lateral distribution of strain of the corrugated steel plate and the bottom surface of the concrete changed significantly, the slip between the corrugated steel plate and the concrete is smaller. However, the normal contact behavior between corrugated steel plate and concrete is uneven.3. According to the partial model, the relationship between bearing capacity of the bridge decks and some important parameters such as concrete strength grade, the thickness and strength of the corrugated steel plate is analyzed to provide the reference and basis for engineering designing.4. The stress of the concrete bridge decks, corrugated steel plate and the beam caused by shrinkage and creep is increased. While the improved strength of concrete, the stress of each components reduces gradually. The incoordinate deformation results in producing the temperature stress.