Title: Compressive Strength and Ductility of Steel Fiber Reinforced Concrete
Author(s): B. Massicotte, B. Mossor, A. Filiatrault, and S. Tremblay
Publication: Symposium Paper
Appears on pages(s): 163-180
Keywords: columns; confinement; ductility; experimental testing; reinforced concrete (SFRC); seismic resistance; steel fibers
It is known that Steel Fiber Reinforced Concrete (SFRC) has advantages over plain concrete. In particular, fiber reinforcement makes concrete tougher and more ductile. Although these attributes are appealing for earthquake resisting structures, design codes do not yet incorporate specifications relative to the use of SFRC for structural applications. Recent developments have indicated a good potential for SFRC in structural and seismic applications. In the first part of this paper, the beneficial effects of SFRC in the seismic design of columns are briefly reviewed. The paper then presents an overview of an ongoing research project on compression. The variables considered were the fiber content of 0%, .5% and 1.0% per volume, the amount of transverse reinforcement for confining the column core, and the confinement provided by the fibers in the cover. It is shown that SFRC improves significantly the post-peak behavior of columns for all hoop spacing and the same seismic design philosophy. Although SFRC in the cover delay its spalling confine concrete, but rather change the failure mode by limiting the progression of cracks and enhancing the aggregate interlock along failure planes.