墙体结构用3D打印混凝土砌体设计：各种荷载作用下的力学性能及强度计算方法

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2024-11-30 DOI:10.1016/j.engstruct.2024.119374

Huawei Liu, Yifei Wang, Chao Zhu, Yiwen Wu, Chao Liu, Chunhui He, Yizhou Yao, Youqiang Wang, Guoliang Bai

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引用次数: 0

摘要

3D打印混凝土（3DPC）墙体结构的承重设计方法不完善，阻碍了大规模建筑3D打印混凝土技术的发展。本研究以3D打印混凝土砌体（3DPCM）墙体为研究对象，旨在研究3D打印混凝土砌体在不同截面形式和荷载下的力学行为和强度计算方法。结果表明：增加斜肋数量可显著提高抗剪强度，但不影响抗压强度；组合抗剪强度与轴压比呈非线性关系，在轴压比为0.4时达到最大值。通过实验和数值模拟，揭示了不同载荷作用下3DPCM的失效模式。在层内界面处，长轴沿x轴打印方向排列的扁球形孔隙是导致3DPCM结构失效的关键因素。最后，提出了三维pcm抗压、抗剪及抗剪复合强度的计算方法。

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Design of 3D printed concrete masonry for wall structures: Mechanical behavior and strength calculation methods under various loads

The advancement of 3D printed concrete (3DPC) technology for large-scale construction is hindered by inadequate load-bearing design methods for 3DPC wall structures. This work focuses on 3D printed concrete masonry (3DPCM) walls and aims to investigate the mechanical behavior and methods for computing the strength of 3DPCMs under various sectional forms and loads. Results showed that increasing the number of inclined ribs significantly enhances the shear strength without affecting the compressive strength. The combined shearcompression strength exhibits a nonlinear relationship with the axial compression ratio, reaching its maximum at a ratio of 0.4. The failure modes of 3DPCM under various loads were revealed through experiments and numerical simulations. The oblate spheroidal pores, with major axes aligned along the X-axis printing direction at intralayer interfaces, were identified as critical to 3DPCM structural failure. Finally, a strength calculation method for the compressive, shear, and combined shearcompression of the 3DPCM was proposed.

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.