Research On Steel-RPC Composite Structure In Landscape Bridge

In recent years, the development of bridge construction in China has taken on a new trends. Public vision is getting higher and higher.The bridge-building is more and more diversified. Material used in the bridge construction is more and more. People start using a new material and a new structure in the construction of landscape bridges. Steel-concrete composite structures are the most common.Ordinary steel-concrete tructure have many advantages.It can effectively reduce the structural weight, increase bearing capacity, and increase space utilization. The structure used in landscape bridge will be part of a comprehensive level of the "highlights". Although there are many advantages of steel-concrete composite structure, but the drawback is equally clear. Due to poor tensile cracking and crack resistance of ordinary concrete, it can’t play a good role in the steel-concrete composite structure. To solve these problems, you can looking for a new material. Reactive powder concrete (RPC) is characterized by high strength, high toughness and durability. RPC instead of ordinary concrete used in the steel-concrete composite structures can further increase the carrying capacity and improve the crack resistance. That making landscapes Bridge is becoming more nimble and innovative. But there is not complete and specific specification about the design of composite structures of steel-RPC. People calculate the bearing capacity of reactive powder concrete reference by empirical formula of the strong ultra-high performance concrete. The calculation results and the actual results compared to a lot of errors. That hinder the development of the application of this material. For the steel-concrete structures, Reinforced anchorage performance, plate bending performance, as well as the shear studs bonding properties of the composite structure are the most basic three indicators. This article focused on the three mechanics indicators to test. Including experimental bond strength. Plate bending experiments and the shear studs launched experimental. The bond strength experiment mainly consider the three factors including reinforcement diameter, reinforcement anchorage length and reinforced protective layer thickness. In the shear studs launched experimental,we research the impact of length of the shear studs for the ultimate strength. Some specific conclusions are drawn by these series of experiments. Reactive powder concrete instead of ordinary concrete used in the steel-concrete composite structures greatly improve the anchoring properties of the material, plate bending performance and crack resistance. That further improve the ultimate bearing capacity of steel-concrete composite structures.These conclusions can provide a reference for future design.