Developmental Research On "Pin" Style Fill Out Steel Tube Concrete Arch Bridge

Steel tube concrete arch bridge obtains fast development in China in recent years. The superior performance of steel tube concrete arch bridge makes it gradually becomes the top choice bridge type of long-span arch bridges. However, as time goes by and the old arch rib section types unavoidably exposed some problem. Therefore, research and improve the arch rib form also has important practical value. The paper based on the cluster-type triple tube arch of Baiwang and Wuliting Bridge and imported the brand new concept of this developmental research–"pin"style fill out steel tube concrete arch bridge.The paper firstly introduces the development of arch bridge types and the present research of concrete filled steel tubular arch bridge,and proposed the existed problems of currently research.Then put forward a new concept of"pin"style fill out steel tube concrete arch bridge for the problems and makes response analysis.The main study contents uses Wuliting Bridge, Mengdonghe Bridge and Kongli Huaihe Bridge as background, simulates by ANSYS, replaces arch rib type into this research thsis and makes comparative analysis with original thesis, thereby draws the reasonable conditions of the usage of new type arch rib. Finally, this paper offers optimization advices that aim at how to make the new type arch rib work sufficiently and effectively according to the research results mentioned above.The result of this paper aims to provide efficient technological reference to the further development of steel tube arch bridge.