INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Experimental Research and Calculation Method of Cracks in Reinforced High Ductility Concrete Beams |
DENG Mingke1, WANG Xuesong1, ZHANG Min1, MA Fudong1, LUO Yan2, SUN Hongzhe1
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1 School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China 2 Chengdu Architectural Design and Research Institute, Chengdu 610000, China |
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Abstract In order to explore the mechanism of crack development in reinforced high ductility concrete (RHDC) beams, a total of four reinforced high ductility concrete beams and one ordinary reinforced concrete (RC) beam were designed, and influence of the ultimate tensile strain and reinforcement ratio of high ductility concrete on component crack width, crack spacing and crack development height were studied through four-point bending tests. Research shows that (Ⅰ) compared with RC beams, RHDC beams have more cracks and smaller widths, and the cracks develop slowly during the loading process; (Ⅱ) the crack width and crack height of RHDC beams decrease with the increase of the ultimate tensile strain of the material; (Ⅲ) the influence of the reinforcement ratio on the crack width of RHDC beams is the same as that of RC beams. As the reinforcement ratio increases, the crack width, crack height and average crack spacing of RHDC beams all decrease. Based on experiments and related literature, considering the contribution of fiber bridges, the calculation formulas for the average crack spacing and maximum crack width of RHDC beams are established. The calculation results are in good agreement with the experimental results.
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Published: 25 January 2022
Online: 2022-01-26
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Fund:National Natural Science Foundation of China (51708445). |
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