Flexural responses of concrete slab over flexible girders through FEA-based parametric evaluation
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Author list: Tangwongchai S., Anwar N., Chucheepsakul S.
Publisher: Springer
Publication year: 2011
Journal: KSCE Journal of Civil Engineering (1226-7988)
Volume number: 15
Issue number: 6
Start page: 1057
End page: 1065
Number of pages: 9
ISSN: 1226-7988
eISSN: 1976-3808
Languages: English-Great Britain (EN-GB)
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Abstract
The determination of flexural responses in a concrete slab over flexible steel girder, forming a composite deck has been a timeconsuming subject for the design engineers. The existing provisions of the design standards such as AASHTO or analytical solutions based on local bending or plate theory usually ignore some significant parameters affecting the deck response, such as girder flexibility, number of loaded traffic lanes and ratio between deck width and girder span. This may lead to unrealistic prediction of bridge flexural responses used in the slab design practice. Although it is well known that finite element analysis is very versatile for structural analysis, very few studies have been reported dealing with explicit determination of deck slab response. The present study investigates the transverse negat nse is carried out through an extensive parametric study focusing on the effect of girder flexibility due to patterns of moving loads. Based on the numerical results, empirical relationships are proposed to determine the maximum slab moments anywhere along the girder span. The application of these relationships is then compared with other references. The suggested relationships seem to give more realistic and economical values of the considered transverse slab bending moment for a wide range of deck proportions. ฉ 2011 Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg.
Keywords
composite deck, girder flexibility, negative slab bending moment, pattern of moving loads, shell-frame model, slab-and-girder deck
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