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Computers and Concrete Volume 16, Number 6, December 25 2015 , pages 825-846 DOI: https://doi.org/10.12989/cac.2015.16.6.825 |
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Shear performance assessment of steel fiber reinforcedprestressed concrete members |
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Jin-Ha Hwang, Deuck Hang Lee, Min Kook Park, Seung-Ho Choi,
Kang Su Kim and Zuanfeng Pan
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| Abstract | ||
| In this study, shear tests on steel fiber reinforced-prestressed concrete (SFR-PSC) members were conducted with test parameters of the concrete compressive strength, the volume fraction of steel fibers, and the level of effective prestress. The SFR-PSC members showed higher shear strengths and stiffness after diagonal cracking compared to the conventional prestressed concrete (PSC) members without steel fibers. In addition, their shear deformational behavior was measured using the imagebased non-contact displacement measurement system, which was then compared to the results of nonlinear finite element analyses (NLFEA). In the NLFEA proposed in this study, a bi-axial tensile behavior model, which can reflect the tensile behavior of the steel fiber-reinforced concrete (SFRC) in a simple manner, was introduced into the smeared crack truss model. The NLFEA model proposed in this study provided a good estimation of shear behavior of the SFRPSC members, such as the stiffness, strengths, and failure modes, reflecting the effect of the key influential factors. | ||
| Key Words | ||
| SFRC; steel fiber; PSC, prestress; shear, nonlinear; FEM; shear strain | ||
| Address | ||
| Jin-Ha Hwang, Min Kook Park, Seung-Ho Choi and Kang Su Kim: Department of rchitectural Engineering, University of Seoul, 163 Seoulsiripdae-ro,Dongdaemun-gu, Seoul 130-743, Republic of Korea Deuck Hang Lee: Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Ave. Urbana, IL 61801, USA Zuanfeng Pan: Department of Building Engineering, Tongji University, 1239 Siping Road, Shanghai 200092,P.R. China | ||