Research on the Mechanical Characteristics of Long Span Cantilever Casting Deck Arch Bridge

Abstract

In order to study the mechanical characteristics of long span cantilever casting deck arch bridge, taking Jiashi super-large bridge with 225m main span as an example, and the finite element software Midas civil is used to analyze the mechanical characteristics of the completion state of the bridge and the changes of the internal force in each construction stage. The results show that the internal force at each segment of the arch ring is small and uniform when the closing segment of long span cantilever casting deck arch bridge is constructed, which can make the closing operation of the main arch ring safely and smoothly. What’s more, the internal force at the arch feet and vault of the main arch ring is large when the bridge is completed, while the internal force at the two construction segments adjacent to the vault is larger than that at the vault which needs to be paid more attention.