Deformation Capacity and Shear Strength of Fiber-Reinforced Cement Composite Flexural Members Subjected to Displacement Reversals
Publication: Journal of Structural Engineering
Volume 133, Issue 3
Abstract
The behavior of fiber-reinforced cement composite (FRCC) flexural members under large displacement reversals was experimentally evaluated. Emphasis was placed on estimating the displacement capacity and shear strength of members constructed with strain-hardening FRCC materials. Two types of fibers were used: Ultrahigh molecular weight polyethylene fibers and steel hooked fibers in volume fractions ranging between 1.0 and 2.0%. The primary experimental variables were: (1) fiber type and volume fraction; (2) type of cement-based matrix (concrete or mortar); (3) average shear stress demand at flexural yielding; and (4) shear resistance provided through hoops versus total shear demand. All specimens constructed with a strain-hardening FRCC, with or without web reinforcement, exhibited drift capacities of at least 4.0%. A shear stress level of represented a lower bound for which no shear failure occurred in the strain-hardening FRCC test specimens, regardless of the member inelastic rotation demand. In addition, buckling of longitudinal reinforcement in the strain-hardening FRCC members without web reinforcement was not observed up to plastic hinge rotations of 4.0%.
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Acknowledgments
The research described herein was partially sponsored by the National Science Foundation under Grant No. CMS 0324519. The opinions expressed in this paper are those of the writers and do not necessarily reflect the views of the sponsors. The writers would also like to acknowledge the support and suggestions of Professor Antoine E. Naaman and Professor James K. Wight. Dramix fibers used in this investigation were generously donated by Bekaert Corp.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 3 • March 2007
Pages: 421 - 431
Copyright
© 2007 ASCE.
History
Received: Feb 22, 2005
Accepted: Nov 14, 2005
Published online: Mar 1, 2007
Published in print: Mar 2007
Notes
Note. Associate Editor: Sashi K. Kunnath
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