Modelling of steel fiber-reinforced concrete under multi-axial loads |
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Authors: | Somsak Swaddiwudhipong Puay Eng Constance Seow |
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Affiliation: | Department of Civil Engineering, National University of Singapore, 10, Kent Ridge Crescent, 119260 Singapore, Singapore |
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Abstract: | Fifty-four plain concrete and steel fiber-reinforced concrete (SFRC) plate specimens containing 0.5%, 1.0% and 1.5% of hooked fibers were tested under biaxial compression. The experimental results obtained were used to verify a failure surface developed earlier by the authors for SFRC under multi-axial loads. An equation has also been proposed in this study to predict the strain at failure for SFRC under multi-axial loads, εci. The proposed failure criterion and equation to predict εci were incorporated into a constitutive model in a well-established finite-element software, ABAQUS. Experiments of SFRC plate specimens under multi-axial loads and beams under two-point load were modeled to illustrate the application of the failure surface to SFRC under varying load conditions. Good agreement between analytical and experimental results is observed. |
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Keywords: | Failure surface Compressive strength Finite-element analysis Fiber reinforcement Modeling |
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