Innovative Design and Development of Simplysupported Tied Arch of Beijing-Shanghai HSR

Abstract: Simply-supported tied arch is a zero-thrust arch bridge with clear structural force, large stiffness, low height, beautiful appearance and economic efficiency. In Xuzhou-Shanghai section of Beijing-Shanghai HSR, the simply-supported tied arch is systematically studied and widely applied for the first time. A total of 21 simplysupported tied arch bridges with the spans of 96 m, 112 m and 128 m respectively are constructed for the route. The simply-supported tied arch is an external static and internal super-static parallel arch or basket arch of Nielsen system in structure; single-box, threechamber and equal-height prestressed concrete box girder is adopted for the tie beam; dumbbell steel pipe concrete section is adopted for the arch rib; PES (FD) low-stress anticorrosion cable body is adopted for the suspender. The rational structural form is determined by comparative study on the key technical parameters such as the layout form of suspender, rise-span ratio and arch axis alignment. This paper summarizes the optimization of simplysupported tied arch structure and looks forward to the development of bridge structure.

Keywords: Beijing-Shanghai HSR; simply-supported tied arch; tie beam; arch rib; suspender; arch foot; cross bracing; key technical parameters