期刊
COMPOSITE STRUCTURES
卷 134, 期 -, 页码 331-342出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2015.08.079
关键词
3D printing; Confinement; Shear failure; Uniaxial compression; Maximum stress criterion; Orthotropic
资金
- National Natural Science Foundation of China [51278276]
- National Basic Research Program of China (973 Program) [2012CB026200]
- Beijing Higher Education Young Elite Teacher Project [YETP0078]
- Tsinghua University Initiative Scientific Research Program [20111081015]
A method to improve the mechanical behavior of 3D-printed elements is presented. 3D-printed elements are orthotropic and weak in their interlayers; thus, FRPs, which are easy-formed, light-weighted and high-strength, are ideal materials to enhance 3D-printed elements. To investigate the reinforcement effect, uniaxial compression tests were conducted on circular column specimens, and four-point flexural tests were conducted on beam specimens. The results indicated that wrapping 3D-printed columns with FRPs changed their failure modes from brittle to ductile, increased the peak loads that they could endure by 1427.2-1792.0% and increased the largest deformations they could achieve by 833.9-1171.3% using different numbers of layers and types of reinforcement. For the 3D-printed beams reinforced with FRPs, the bearing capacities were increased by 179.6-604.5%, and their flexure deflections at their mid-spans were increased by 40.8-225.8%. The failure modes of the 3D-printed beams were affected by numbers of layers and types of reinforcement. Additionally, finite element analyses were conducted to simulate the failure modes of the 3D-printed elements based on the maximum stress criterion. The results showed that the predicted failure locations corresponded with the experimental failure locations observed. According to this study, 3D-printed elements reinforced with FRP sheets showed potential for future development and applications in construction. (C) 2015 Elsevier Ltd. All rights reserved.
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