3D打印混凝土墙体轴心受压性能研究

RESEARCH ON AXIAL COMPRESSION PERFORMANCE OF 3D PRINTED CONCRETE WALL

建筑工业化和施工智能化已成为建筑领域的发展趋势,相应的3D打印技术也逐渐得到应用。因此,3D打印构件的力学性能也需要被系统深入地研究。作为承受建筑物竖向荷载的主要构件,墙体的力学性能对于打印建筑至关重要。为此,设计了8片打印混凝土墙体,采用4种不同的截面形式与2种不同强度的材料加工制作墙体并开展了轴心受压试验研究。结果表明:打印墙体的两端为主要的受力部位,墙体破坏均从两端开始;布置内部肋可以提高对两侧墙板的约束作用,改善墙体的整体性和受力均匀性,进而提升打印墙体的承载力;使用水泥强度等级高的打印墙体截面刚度大、竖向位移小且开裂荷载高。

Building industrialization and construction intelligence have become the current development trend.With the application of 3 D printing technique in the construction field,the mechanical properties of 3 D printed components need to be further studied.As one of the main components,mechanical properties of the wall are crucial to the performance of printed buildings under vertical load.Therefore,eight 3 D printed concrete walls were designed with different section forms and material strengths,and the axial compression test was carried out.It was found that the two ends of printing walls were the main parts subjected to the external loads,and the failure began at both ends.The arrangement of ribs in the 3 D printed wall could enhance the connection between the two wallboards,improve the integrity of the wall and enhance the bearing capacity of the 3 D printed wall.The printed wall with higher cement strength had higher section stiffness,smaller vertical displacement and higher cracking load.