An Improved Constitutive Statistical Damage Model of a Multisize Polypropylene-Fiber-Reinforced Concrete Under Compression
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To study the effect of multisize polypropylene fibers on the compression characteristics of concrete cubes, ten sets of polypropylene fiber-reinforced concrete test pieces were designed and fabricated to obtain their stress–strain curves and mechanical parameters at different ratios of coarse and fine fibers. Results for the cubes with multisize fibers were better than for those with to single-size ones. Based on test results, an improved statistical damage constitutive model for such a material is proposed.
Keywordspolypropylene-fiber-reinforced concrete statistical damage correlation coefficient
This study was supported by the Research and Development Fund of Fujian University of Technology (Grant No. GY-Z17160), the Training Plan for Outstanding Young Scientific Research Talents in Colleges and Universities of Fujian Province (Grant No. GY-Z18160), the National Natural Science Foundation of China (Grant No. 41372356) and the Chongqing basic and frontier research project (Grant No. cstc2013jcyjA30005). We gratefully acknowledge these supports.
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