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http://dx.doi.org/10.7781/kjoss.2017.29.4.311

Flexural Performance of Multistage Prestressed and Self-weight Preflex Girder  

Choi, Byung Ho (Dept. of Civil & Environmental Engineering, Hanbat National University)
Kim, Tae Bong (Institute of Construction Safety Technology, Hanbat National University)
Park, Sung Kyun (Bridge 3, COWI KOREA.)
Publication Information
Journal of Korean Society of Steel Construction / v.29, no.4, 2017 , pp. 311-321 More about this Journal
Abstract
This paper deals with the flexural performance of a composite girder system designed to readily form a composite section without a formwork and to easily realize multistage preflexing and prestressing. After a 3-Dimensional finite element modeling for construction stage analysis, the parametric numerical analysis was performed to analyse the stress distribution on the composite girder sections and the prestressing effects along with concrete pouring method and strand tensioning method. Based on the stress distribution analysis, a favorable construction stage model has been rationally chosen and then the ultimate flexural strengths were evaluated to conduct a comparative study, which exceed the nominal flexural strength suggested by the current design specification(ASD). It can be concluded that the proposed composite girder and fabrication procedure should have a sufficient structural performance.
Keywords
Construction stage analysis; Flexural strength; Prestressed girder; Steel composite girder; Structural performance;
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