Finite element analysis of partially prestressed steel fiber concrete beams in shear |
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| Affiliation: | 1. Department of Civil Engineering, National University of Singapore, Singapore;2. Dr. Lee Chiaw Meng Associate, Singapore;1. Department of Immunology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania;2. Department of Pediatrics II, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania;3. Emergency Hospital for Children, Cluj-Napoca, Romania;4. Babes-Bolyai University, Department of Molecular Biology and Biotechnology, Cluj-Napoca, Romania;1. Department of Psychological and Brain Sciences, Neuroscience Research Institute, University of California at Santa Barbara, Santa Barbara, CA 93106-9660, USA;2. Translational Neuroscience Facility, School of Medical Sciences, University of New South Wales, New South Wales 2052, Australia;3. Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN 46202, USA;1. Faculty of Civil Engineering, The University of Danang - University of Science and Technology, 54 Nguyen Luong Bang, Danang, Viet Nam;2. Materials and Corrosion Technology, Mott MacDonald, Altrincham, UK;3. Sheffield Hallam University, Sheffield, UK;1. Hunan Provincial Key Lab on Damage Diagnosis for Engineering Structures, Changsha, China;2. College of Civil Engineering, Hunan University, Changsha, China;3. Department of Civil and Environmental Engineering, The University of Tennessee, Knoxville, TN, USA |
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| Abstract: | This paper presents a finite element formulation for the modeling of the behavior of partially prestressed steel fiber concrete beams in shear. Based on a secant modulus approach, the formulation treats steel fiber concrete as an orthotropic material, characterized by appropriate constitutive relations in the principal compressive and tensile directions. An experimental program with the partial prestressing ratio, the shear span:effective depth ratio, and the volume fraction of steel fibers as test variables was carried out and the deflections of the beam, concrete, and steel strains were monitored and compared with the results of the finite element analysis. The finite element formulation was found to predict the deformational characteristics and the ultimate load of the test beams well. Steel fibres were observed to improve the beam stiffness after the occurrence of first shear crack and to enhance the shear strength of partially prestressed concrete beams significantly. |
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