A comparative study of the long-span steel-concrete composite bridge with prestressed concrete bridge based on Midas

Abstract

The bridges mainly include concrete, steel, and steel-concrete composite forms. Due to the lack of steel in China in the 1950s, steel bridges were rarely used in highway bridge construction, which also limited the development and application of steel-concrete combinations in China. In the past few decades, the steel-concrete combination mechanism gradually in China's bridges continues to develop, because of its overall force economy, steel and concrete material characteristics of both play advantages of rationality, ease of construction, and other advantages to be promoted [1]. Two bridge types, a prestressed concrete bridge, and a steel-concrete composite bridge, both with a span of 290 m and a single deck width of 14.75 m, were designed with the background of the original data from a certain location. Afterward, finite element models of the two bridge types were established with Midas, followed by comparative analyses of the flexural, shear, and crack resistance, construction cycle, and investment cost of the two bridge types. The results showed that the steel-concrete composite bridge exhibited better performance in most aspects.