钢筋高延性混凝土梁裂缝试验研究与计算方法

doi:10.11896/cldb.20120239

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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.

Key words： high ductility concrete ultimate tensile strain crack width crack spacing bending performance

Published: 25 January 2022 Online: 2022-01-26

CLC number:	TU375.1
	TU528

Fund:National Natural Science Foundation of China (51708445).

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	Articles by authors
	DENG Mingke
	WANG Xuesong
	ZHANG Min
	MA Fudong
	LUO Yan
	SUN Hongzhe

Cite this article:

DENG Mingke,WANG Xuesong,ZHANG Min, et al. Experimental Research and Calculation Method of Cracks in Reinforced High Ductility Concrete Beams[J]. Materials Reports, 2022, 36(2): 20120239-9.

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http://www.mater-rep.com/EN/10.11896/cldb.20120239 OR http://www.mater-rep.com/EN/Y2022/V36/I2/20120239

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