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3D打印结构加强混凝土短柱抗压力学性能研究
An experimental study of compressive mechanical behavior of 3D-printing reinforced concrete short column
投稿时间: 2017-03-16  最后修改时间: 2017-04-19
DOI:
中文关键词:  3D打印结构  加强混凝土  力学性能  单轴压缩试验
英文关键词:3D-printing structure  reinforcement concrete  mechanical behavior  unconfined compression.
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
夏明杰 北京工业大学 15801612569@163.com 
范立峰 北京工业大学 fanlifeng@bjut.edu.cn 
马国伟 北京工业大学 guowei.ma@uwa.edu.au 
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中文摘要:
      以韧性树脂为材料,采用光固化3D打印技术,制作由若干纵筋和环向箍筋组成的3D打印结构网架,用于加强混凝土材料。混凝土试件为直径100mm,高200mm的圆柱,由M2.5水泥砂浆为基体,配筋率体积比为2.17%。另制作相同尺寸的无加筋素混凝土试件作对比试验。单轴压缩试验结果表明,与素混凝土试件相比,3D打印结构加强混凝土试件的抗压强度提高了53.28%,峰值应变提高了70.22%,极限应变提高了164.66%,峰前吸收能量值提高了134.21%。3D打印结构加强混凝土试件破坏后强度下降比素混凝土试件更缓慢,在破坏形态上,加强后的试件裂纹更窄。论证了3D打印结构加强混凝土在工程中应用的可行性。
英文摘要:
      The concrete reinforced by a frame composed of a number of longitudinal ribs and hoop ribs was produced by using 3D-printing technology. The cylindrical concrete specimens with diameter of 100 mm and height of 200 mm were reinforced by a 3D-printing cage at the reinforcement ratio of 2.17%. Specimens without reinforcement were used as a comparison. Compression tests were conducted to investigate the mechanical properties. The results indicate that the peak strength of specimen reinforced by 3D-printing structure increases by 53.28 % compared with the unreinforced specimen. Meanwhile, the strain at peak strength, the ultimate strain and energy absorption before peak strength increases by 70.22 %, 164.66 % and 134.21%, respectively. After peak strength, the stress-strain curve of specimen reinforced by the 3D-printing structure declines much slowly than the specimen without reinforcement. Moreover, the crack width of reinforced specimen is much narrower. Finally, the feasibility of the concrete reinforcement technology based on 3D- printing in engineering was demonstrated.
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