An experimental study was performed to the new-type composite spine girder with prestressed multi-cantilever composite beams with corrugated steel webs. According to the conclusion that corrugated steel webs cant resist bending moment and the quasi plane section assumption, the main behaviors of this structure, such as the creep and shrinkage effect of concrete slab and the efficiency of prestress were analyzed. Then, the load distribution rules of cantilever beams with corrugated steel webs and inner force distribution under living loads were investigated by utilizing the modified rigid-joint girder method based on transformed section method. Results show that this structure has better crack resistance capacity than traditional one, and the multi-cantilever prestressed composite beams with corrugated steel webs have good mechanical performances.
Key words
bridge engineering /
cantilever composite beam /
experimental research /
prestressed corrugated steel web
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