3D打印混凝土空腹重力坝的静力学数值模拟探讨

摘要/Abstract

摘要： 目前关于3D打印混凝土技术在水利工程中的应用相对较少,本文以某一10 m高的小型空腹重力坝为研究对象,基于ANSYS软件模拟并探讨了在自重压力和静水压力作用下3D打印混凝土空腹重力坝的承载能力问题,讨论了层间弱面对水工结构承载能力的影响。结果表明:在自重压力和静水压力作用下,该10 m高的3D打印混凝土小型空腹重力坝未发生大变形,能够发挥其正常使用功能;在该空腹重力坝的上游坝踵位置出现超应力区,但范围极小且可以通过加设钢筋等措施予以解决;在空腹部分靠近上游面的位置出现了超过层间弱面抗拉强度的拉应力值,须采取增强层间弱面粘结能力或设置钢结构桁架抵消拉应力等措施来保证坝体安全可靠。

关键词: 3D打印, 混凝土, 空腹重力坝, 静水压力, 自重压力, 层间弱面

Abstract: There are relatively few applications of 3D printed concrete technology in water conservancy projects, currently. A small hollow gravity dam with a height of 10 m was taken as the research object, based on ANSYS software to simulate and discuss the bearing capacity of 3D printed concrete hollow gravity dam under the action of self-weight pressure and hydrostatic pressure. The impact of weak interlayers on the bearing capacity of hydraulic structures was discussed.The results show that under the action of self-weight pressure and hydrostatic pressure, the 10 m high 3D printed small concrete hollow gravity dam has no major deformation and can perform its normal use function. There is an over-stress zone at the upstream heel of the hollow gravity dam, but the area is extremely small and can be solved by adding steel bars and other measures. A tensile stress value that exceeds the tensile strength of the weak interlayers appears at the position of the hollow part near the upstream surface. Measures must be taken to enhance the bonding ability of weak interlayers or set up steel trusses to offset tensile stress to ensure the safety and reliability of the dam.

Key words: 3D printing, concrete, hollow gravity dam, hydrostatic pressure, self-weight pressure, weak interlayer

中图分类号:

TU528

刘晓蓬, 冯竟竟, 刘仲秋, 周晶. 3D打印混凝土空腹重力坝的静力学数值模拟探讨[J]. 硅酸盐通报, 2021, 40(6): 1905-1910.

LIU Xiaopeng, FENG Jingjing, LIU Zhongqiu, ZHOU Jing. Discussion on Statics Numerical Simulation of 3D Printed Concrete Hollow Gravity Dam[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(6): 1905-1910.

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