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Design and Safety Control in Construction Stage of Prestressed Concrete Box Girder Bridge with Corrugated Steel Web  

Kim, Kwang-Soo (Hwamyung Grand Bridge Construction Project, Hyundai Engineering & Construction Co., LTD)
Publication Information
Journal of the Korean Society of Safety / v.23, no.2, 2008 , pp. 87-97 More about this Journal
Abstract
The Ilsun Bridge is the world's longest box girder bridge(801m) with corrugated steel webs and has the widest width($21.2{\sim}30.9m$: tri-cellular cross section) among these kinds of composite girder bridges. It has fourteen spans(50m, 10 at 60m, 50m, 2 at 50.5m) where twelve spans are erected by the incremental launching method and two spans by full staging method. Special topics related to the structural safety of prestressed concrete box girder bridge with corrugated steel web in construction stage and service were reviewed. Investigations focus on the span-to-depth ratio, shear stress of corrugated steel webs and optimization of tile length of steel launching nose. The span-to-depth ratio of Ilsun bridge has been found to be well-planned while the corrugated steel web has been designed highly conservative and it has been observed that the conventional nose-deck interaction equation do not fit well with corrugated steel web bridges. As a result, detailed construction stage analysis was performed to check the stress levels and the safety of preceding design conditions. Finally, from the design review of Ilsun bridge, this study suggests optimal design issues which should be of interest in designing a prestressed concrete box girder bridge with corrugated steel webs.
Keywords
prestressed concrete box girder bridge with corrugated steel web; incremental launching; span-to-depth ratio; design shear stress; nose-optimization; construction stage analysis;
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