3D打印混凝土墙体偏心受压性能研究  

RESEARCH ON ECCENTRIC COMPRESSION PERFORMANCE OF 3D PRINTED CONCRETE WALL

作　　者：蔡建国[1] 杜彩霞 张鹏[1] 张骞[1] 冯健[1] CAI Jianguo;DU Caixia;ZHANG Peng;ZHANG Qian;FENG Jian(National Prestress Engineering Research Center,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学国家预应力工程技术研究中心,南京211189

出　　处：《工业建筑》2021年第6期29-35,共7页Industrial Construction

基　　金：国家重点研发计划项目(2018YFC0705800)。

摘　　要：3D打印技术是智能建造和新型建筑工业化的前沿领域,在建筑领域具有广泛的应用前景。作为结构中承受竖向荷载的主要构件之一,墙体的承载力对于结构安全性至关重要。而实际工程中墙体所受的竖向荷载多为偏心作用,因此考虑不同的墙体截面形式、材料强度以及偏心距等设计了10片打印混凝土墙体,并进行了偏心受压试验研究。研究发现:打印墙体中肋的布置不仅可以增大墙体截面刚度,还可以增强两片打印墙板的联系,提高墙体的整体性,进而提升打印墙体的承载力;使用水泥强度等级越高的混凝土材料,墙体截面刚度越大,荷载作用下竖向位移越小;避免墙体薄弱部位的直接受力能够有效地提高构件的承载力;偏心距的增大能够显著降低构件的承载力,加速构件的破坏。3 D printing technique is the frontier field of intelligent construction and new building industrialization.3 D printing technique has a broad application prospect in the construction field.As one of the main components bearing vertical load in the structure,the bearing capacity of the wall is crucial to the structural safety.In practical engineering,the vertical load of the wall is mostly eccentric.Therefore,the paper designed 10 printed concrete walls considering different cross-section forms,material strength and eccentricity,and conducted eccentric compression test on the walls.It was found that the arrangement of ribs in the printed wall could not only increase the stiffness of the wall section,but also enhance the connection between the two printed wall panels,improve the integrity of the wall,and thus improve the bearing capacity of the printed wall.The higher the cement strength grade,the greater the stiffness of concrete wall section,the smaller the vertical displacement under load.Avoiding the direct force of weak parts of the wall could effectively improve the bearing capacity of components.The increase of eccentricity could significantly reduce the bearing capacity of components and accelerate the failure of components.

关 键 词：3D打印混凝土墙体 偏心受压 截面形式 破坏现象 偏心距 

分 类 号：TU37[建筑科学—结构工程]