Seismic performance evaluation of RC columns surrounded by 3D-printed outer shells including short fibers based on quasi-static cyclic loading tests

• Published in: Journal of Structural Engineering, A Vol. 71A; pp. 641 - 654
• Main Authors: Kinomura, Koji, Murata, Satoshi, Hata, Akihito, Yamamoto, Yujin
• Format: Journal Article
• Language: Japanese
• Published: Japan Society of Civil Engineers 2025; 公益社団法人 土木学会
• Subjects: 3-dimension printing; 3Dプリンティング; quasi-static cyclic loading; RC column; RC柱; short fiber; 正負交番載荷試験; 短繊維
• ISSN: 1881-820X
• DOI: 10.11532/structcivil.71A.641

In this study, two 3DCP (3D concrete printing)-RC composite columns with 3D-outer shells which one containing 1% and the other containing 2% short fibers were produced and compared with a conventional RC column in terms of seismic performance through quasi-static cyclic loading tests. As a result, it was confirmed that the maximum horizontal strength and the ductility on both 3DCP-RC columns were enhanced in comparison with the conventional column. On the other hand, the short fiber volume contained in outer shell had only a slight impact on seismic performance, and this seemed to be caused by butt joints due to 3D-printing path which avoided the rebars embedded in the footing. Nevertheless, the 3DCP-RC column in this study demonstrated the enough high seismic performance.