Verification of incremental launching construction safety for the Ilsun Bridge, the world's longest and widest prestressed concrete box girder with corrugated steel web section

Kwanghoe Jung, Kwangsoo Kim, Chungwook Sim, Jangho Jay Kim

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The Ilsun Bridge is the world's longest (801m in total length) and widest (30.9m in maximum width) prestressed concrete box girder bridge incorporating a corrugated steel web. This bridge has fourteen spans, twelve of which were erected using an incremental launching method, a method that is rarely applied in this type of bridge. To verify the construction safety of the Ilsun Bridge, this investigation focuses on the span-to-depth ratio, buckling shear stress of the corrugated steel webs, optimization of the length of the steel launching nose, detailed construction stage analysis, and the stress level endured by the corrugated steel webs during the launching process. The span-to-depth ratio of the Ilsun Bridge was found to be well-designed, using a conservative corrugated steel web design. Further, our investigation revealed that the conventional nose-deck interaction equation was not suitable for corrugated steel web bridges. As a result, a detailed construction stage analysis and measurements of this bridge was performed to examine stress levels and ensure safety during the erection process. The results revealed that there are essential design issues that should be considered when designing prestressed concrete box girder bridges with corrugated steel webs and that, when constructing them, the incremental launching method should be used.

Original languageEnglish
Pages (from-to)453-460
Number of pages8
JournalJournal of Bridge Engineering
Volume16
Issue number3
DOIs
Publication statusPublished - 2011 May 1

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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