Title:
Flexural Behavior of Composite Concrete Slabs Using Carbon Fiber Laminate Decks
Author(s):
Ziad Bayasi and Henning Kaiser
Publication:
Materials Journal
Volume:
100
Issue:
4
Appears on pages(s):
274-279
Keywords:
concrete; ductility; epoxy; shear; slab; stud
DOI:
10.14359/12664
Date:
7/1/2003
Abstract:
The use of a carbon fiber epoxy deck to take the place of a steel deck in composite concrete slabs was explored. Test variables considered were deck thickness and the presence or absence of steel bar reinforcement in the concrete topping. The deck was premade while the concrete topping was placed at a later stage. Four 12.5 mm shear studs per each specimen were used to transfer forces among composite system components. Testing was in four-point bending. Uneven distribution of load among shear studs due to deck’s nonductile behavior caused inner studs to fail in bearing prematurely and resulted in a reduction of load-resisting capacity of composite samples. Based on test results, a larger number of shear studs were needed to reduce failure potential due to inadequate stress transfer, bearing failure at shear stud, and resultant deck buckling. In spite of early letdown of the generally brittle carbon fiber decks, concrete toppings with added steel bars sustained their bending resistance due to their enhanced ductility and toughness.