Abstract: 3D printing concrete technology, as a new process of building construction, has the characteristics of no formwork and high construction efficiency. Different from conventional concrete, the bottom concrete has become the main stress part of 3D printing buildings due to the construction method of stacking layer by layer. Therefore, improving the bearing capacity of the underlying structure has become one of the key technology to improve the constructability and structural stability of 3D printed buildings. In this paper, differences between the conventional construction process and 3D printing concrete technology were compared. The compressive stress and shear stress of the bottom concrete caused by the gravity of the upper concrete layer were summarized, as well as the force model describing the relationship between the two stresses was introduced. The deformation of the bottom concrete due to the heterogeneity of the force, and resulting failure of the printed structure were analyzed. Finally, three methods to optimize the bottom load were put forward:adjusting the setting time of concrete for printing, improving the static yield stress of concrete and selecting reasonable printing process parameters.
张大旺, 杨欢, 李辉. 3D打印建筑底层荷载的研究进展[J]. 材料导报, 2025, 39(16): 24060021-12.
ZHANG Dawang, YANG Huan, LI Hui. Research Progress of 3D Printing Building Bottom Loading. Materials Reports, 2025, 39(16): 24060021-12.
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2025, Vol. 39 
