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Experiment and Modelling on Effective Width of Single and Twin I-beam Composite Girders.
- Source :
- KSCE Journal of Civil Engineering; Jun2023, Vol. 27 Issue 6, p2559-2569, 11p
- Publication Year :
- 2023
-
Abstract
- Effective width (b<subscript>eff</subscript>) has been widely used by designers, and several specifications can be selected. However, insufficient research has been conducted on the b<subscript>eff</subscript> of single and twin I-beam composite girders. Thus, finite element (FE) models, calibrated by the experiment, were used to study the effects of slab thickness, web position, interaction degree (ID) of shear studs, width-to-span ratio, and their coupling effects on b<subscript>eff</subscript>. Different loading types and two definitions of b<subscript>eff</subscript> were elaborated. The FE results were compared with specifications in Eurocode 4 (EC4) and AASHTO LRFD bridge design specifications (AASHTO). The following results were obtained. The modeling agrees with the experiment. The critical steel height-to-slab thickness ratio is around 4. When the ratio deviates from the critical value, b<subscript>eff</subscript> is reduced with the increase of slab thickness. ID has a slight influence on b<subscript>eff</subscript>. b<subscript>eff</subscript> changes within 10% when ID changes within 10%. The maximum b<subscript>eff</subscript> can be obtained when the web spacing-to-physical width ratio is 1/2. The decrease of web spacing brings a maximum reduction of 14% on b<subscript>eff</subscript>, whereas increasing web spacing results in a maximum reduction of 70% for twin I-beam. The coupled effect of web position and slab thickness is limited. The maximum difference is 25%. Recommended equations were proposed to evaluate b<subscript>eff</subscript> for single I-beam and twin I-beam composite girders based on the specifications in EC4 and AASHTO, which can ensure that the negative error is within 10%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 12267988
- Volume :
- 27
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- KSCE Journal of Civil Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 164005355
- Full Text :
- https://doi.org/10.1007/s12205-023-1568-9