Investigation of Ultimate Strength of Deck Slabs in Steel-Concrete Bridges

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Investigation of Ultimate Strength of Deck Slabs in Steel-Concrete Bridges

Author(s): Yu Zheng, Su Taylor, Des Robinson, and David Cleland

Publication: Structural Journal

Volume: 107

Issue: 1

Appears on pages(s): 82-91

Keywords: beam; bridge; compressive strength; membrane.

Date: 1/1/2010

Abstract:
In the last 50 years, many bridges have been built as composite structures with decks of reinforced concrete that are supported by longitudinal steel beams. The presence of the longitudinal steel beams and the unloaded area of concrete slab cause the loaded deck slabs to be restrained against lateral expansion. As a result, a compressive membrane thrust is developed. In experimental tests, the authors built a series of one-third scale steel-concrete composite bridge models with several varying structural parameters, including concrete compressive strength, reinforcement percentage, and the size of steel supporting beams. After comparing the results of different models, the influence of these structural parameters on the amount of compressive membrane action in the deck slab was evaluated. Furthermore, the improvement of an existing theoretical model provided accurate predictions for the loading-carrying capacities.