New Concept for Durable Concrete Bridges
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This master s thesis covers the design of a post-tensioned concrete bridge in Trondheim municipality in Norway, in collaboration with Statens vegvesen (SVV). The concept of the bridge is inspired by Egg-Graben-Brücke in Austria, which was designed and built without steel reinforcement in the bridge deck. The total length of the bridge is 73 meters and it is divided into 3 spans. The cross-section of the bridge is assumed as a massive T-beam/slab with flanges. The width of the cross-section with edge beams is 9,5 meters and the height is 1,3 meters. The bridge is planned to be built in 4 stages and a proposed building process is presented.The bridge is post-tensioned in longitudinal and transverse direction. Due to the high maintenance costs of bridges, the bridge is designed to use as little steel reinforcement as possible to enhance the durability. The number of prestressing tendons have been determined. The design is according to established standards such as Eurocodes, and Handbook N400 by Statens vegvesen. Analytical models have been created in the program NovaFrame for longitudinal direction and some parts in the program Scia Engineer for transverse direction. The master s thesis contains analyses for ultimate limit state and serviceability limit state for critical sections. The capacities and requirements are sufficient in the controlled sections for both limit states.