长沙理工大学学报(自然科学版)
3D打印预制混凝土扭曲面模壳-现浇柱节段成型试验研究
作者:
作者单位:

(1.长沙理工大学 土木工程学院,湖南 长沙 410114;2.湖南建设投资集团有限责任公司,湖南 长沙 410029)

作者简介:

蒋友宝(1982—)(ORCID: 0000?0003?0276?818X),男,教授,主要从事3D打印混凝土结构与智能建造方面的研究。E?mail:jiangybseu@163.com

通讯作者:

蒋友宝(1982—)(ORCID: 0000?0003?0276?818X),男,教授,主要从事3D打印混凝土结构与智能建造方面的研究。E?mail:jiangybseu@163.com

中图分类号:

TU528.79

基金项目:

湖南省杰出青年基金资助项目(2022JJ10050);湖南建设投资集团有限公司重大专项(JGJTK2022?20);湖南省自然科学联合基金资助项目(2021JJ50048)


Experimental study on segmental forming of 3D printing prefabricated
Author:
Affiliation:

(1.School of Civil Engineering, Changsha University of Science & Technology, Changsha 410114, China;2. Hunan Construction Investment Group Co., Ltd., Changsha 410029,China)

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    摘要:

    【目的】解决混凝土扭曲柱支模复杂、成型困难等问题,探究3D打印混凝土预制模壳扭曲柱的建造方法,研究扭曲柱节段的受压性能。【方法】通过打印条带成型质量试验,确定适合3D打印预制模壳成型的打印参数;对层扭转角为0°、2°、4°和6°的3D打印扭曲面模壳进行建造成型试验;在模壳内填充钢筋笼与现浇的C50混凝土,制备得到扭曲柱节段并对其进行受压性能试验。【结果】扭曲面预制模壳可连续打印的高度随着层扭转角的增大而减少,层扭转角为0°时扭曲面模壳可连续打印的高度为550 mm,较层扭转角为6°时扭曲面模壳的可连续打印高度提高了96%;层扭转角为2°时扭曲柱节段平均极限承载力最低,为1 120.20 kN;层扭转角为6°时扭曲柱节段平均极限承载力最大,为1 291.56 kN;不同层扭转角的扭曲柱节段极限承载力的相对极差均控制在5%以内。【结论】由于层间扭转悬空部位的存在,扭曲面预制模壳的构件会发生侧向偏移,最终失稳并发生倒塌破坏。不同层扭转角的扭曲柱节段的平均极限承载力极差较小,即极限承载力的离散性较小,扭曲柱节段成型质量较好。

    Abstract:

    [Purposes] The paper aims to solve the problems of complex formwork and difficult forming of twisted concrete columns. The construction method of twisted columns based on 3D printing concrete prefabricated formwork was explored, and the compression performance of twisted?column segments was studied. [Methods] The quality test of printing strip forming determined the printing parameters suitable for forming 3D printing prefabricated formwork. The 3D printing twisted surface formwork with interlayer twist angles of 0°, 2°, 4° and 6° was constructed and tested. The reinforced cage and cast?in?situ C50 concrete were filled in the formwork to prepare the twisted?column segments and the compression test of the member was carried out. [Findings] The continuous printing height of the twisted surface prefabricated formwork decreases with the increase of the single?layer twisted angle. The continuous printing height of the twisted surface formwork with an interlayer twist angle of 0° is 550 mm, 96% higher than the member built by an interlayer twist angle of 6°. The average ultimate bearing capacity of the?column segment with the twist angle of 2° is the lowest, 1 120.20 kN; The average ultimate bearing capacity of the twisted column with interlayer twist angle of 6° is the largest, which is 1 291.56 kN. The relative range of ultimate bearing capacity of twisted?column composite members with different twisted angles is within 5%. [Conclusions] Due to the torsional part between the layers, the members of the twisted surface prefabricated formwork will have lateral offset, losing stability and collapse. The range of average ultimate bearing capacity of twisted?column members with different twist angles is small, i.e.,the discreteness of ultimate bearing capacity is low, and the forming quality of twisted?column segments is better.

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贺昊轩,蒋友宝,邓云峰,等.3D打印预制混凝土扭曲面模壳-现浇柱节段成型试验研究[J].长沙理工大学学报(自然科学版),2022,19(4):47-54.
HE Haoxuan, JIANG Youbao, DENG Yunfeng, et al. Experimental study on segmental forming of 3D printing prefabricated[J]. Journal of Changsha University of Science & Technology (Natural Science),2022,19(4):47-54.

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  • 在线发布日期: 2023-01-16
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