Effective Slab Width for Composite Steel Bridge Members (2005) / Chapter Skim
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– Prestressed, either constant depth or variable depth, and often prestressed longitudinally as well as transversely, on potentially very wide girder spacings • Alignment: – Right – Skew • Span Location: – Positive Moment Region – Negative Moment Regions considered composite where sufficient shear studs and longitudinal reinforcing steel are supplied • Applicable Limit State, e.g., – Service II and Fatigue (elastic) , and – Strength I and perhaps Strength II (possibly inelastic)
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Bending Stress fb Compactness of Web c w D t Nominal Flexural Resistance Mn, Fn Limiting Web Stress Fcrw Compressive Stress in Web fcw Factored Applied Moment Mu Figure 2. Design parameters influenced by effective width.
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. Effective width according to the new definitions developed in Task 4 was extracted from the finite element analysis results considering both interior and exterior girders, service and strength limit states, positive and negative moment regions, and both right and skew alignments.
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contains information about the finite element modeling of the prestressed girder bridge structures investigated in this study, while Appendix O (provided in print herein and on the accompanying CD-ROM) presents worked design examples illustrating the use of the new proposed provisions for effective slab width.
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