Research on Long-Span Bridges with Composite Style of Continuous Rigid Frame and Flexible Arch

摘要

The railway from YiChang to WanZhou ,will cross the the Yangtze River in YiChang city, where an extra-large bridge will be constructed, and the main bridge is arranged as 130 m+2 x 275 m+ 130 m with a composite style of continuous rigid frame and flexible arch. This new-style bridge with such a composite structure has large vertical stiffness, excellent resistance to force impact and cost-effectiveness, which will speed up the progess and development of the technology of long-span railway bridges. This paper discribes the design study of such composite-style bridge and the analyses on the structures.