01020232

Component

https://doi.org/10.3141/1928-02

http://scholar.google.com...+Ahn&publication_year=2005

A composite section is made up of a steel girder and concrete slab connected by shear connectors. The shear lag phenomenon usually takes place in such a section and results in underestimation of stresses and strains at the web-to-flange intersections of the girder. With the introduction of the concept of effective slab width, the actual width can be replaced by an appropriate reduced slab width. The classical effective slab width definition does not take into account the strain variation through the slab thickness. More sophisticated definitions are introduced and used with finite element analyses. The method of finite element modeling is discussed, and the model is successfully verified with experimental results. Parametric study is conducted to investigate the effective slab width for both positive and negative moment sections. The effective slab width is computed and compared with the current AASHTO load and resistance factor design (LRFD) specifications. The results demonstrate that full width can be used as the effective slab width in the design and analysis in most cases for the design and analysis of both positive and negative moment sections. The current AASHTO LRFD specifications are found to be conservative for configurations with widely spaced girders, especially in negative moment sections.

01020206

English

pp 13-26

2005

Transportation Research Record: Journal of the Transportation Research Board

030909402X

Print

Figures (11) ; References (9) ; Tables (5)

Bridge decks; Concrete; Finite element method; Girders; Load and resistance factor design; Mathematical models; Slabs; Specifications; Steel; Strain (Mechanics); Stresses

Composite bridges; Effective width; Negative moment regions; Positive moment regions; Shear connectors

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB, ATRI

Mar 13 2006 8:23PM

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