Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 24, Issue 10, Pages 2030-2041Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2010.03.009
Keywords
Pullout; Steel fiber; Ultra-high strength; Inclined fiber; Bond strength
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Funding
- Korea Institute of Construction Technology
- Ministry of Knowledge Economy
- National Research Council of Science & Technology (NST), Republic of Korea [KICT2010-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, as a part of research to characterize the tensile properties of steel fiber reinforced ultra-high strength cementitious composites, pullout tests of steel fiber were performed to evaluate the effect of fiber inclination angle on the load direction and an analytical pullout model was derived considering this effect. The fiber inclination angles considered in the pullout tests were 0 degrees, 15 degrees, 30 degrees, 45 degrees, and 60 degrees. From the pullout tests, it was observed that the largest peak load was obtained at an angle of 30 degrees or 45 degrees, and the peak slip increased as the fibers were oriented at a more inclined angle. Based on the experimental results, an analytical pullout behavior model considering fiber inclination was proposed. In order to take into account the effect of fiber inclination in the pullout model, apparent shear strengths (tau((app))) and slip coefficient (beta) were introduced to express the variation of pullout peak load and the augmentation of peak slip as the inclined angle increases. These variables are expressed as functions of the inclined angle (phi). (C) 2010 Elsevier Ltd. All rights reserved.
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