3D打印混凝土建造性能的量化模型研究

史庆轩; 万胜木

doi:10.13204/j.gyjzG20120105

3D打印混凝土建造性能的量化模型研究

doi: 10.13204/j.gyjzG20120105

史庆轩^1,2,3,
万胜木^2, ,

1. 西部绿色建筑国家重点实验室, 西安建筑科技大学, 西安 710055;
2. 西安建筑科技大学土木工程学院, 西安 710055;
3. 西安建筑科技大学结构工程与抗震教育部重点实验室, 西安 710055

基金项目:

国家自然科学基金项目（51878540）。

详细信息

作者简介:
史庆轩,男,1963年出生,博士,教授,博士生导师。

通讯作者:
万胜木,wanshengmu@xauat.edu.cn。

计量
- 文章访问数: 121
- HTML全文浏览量: 6
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2020-12-01
- 网络出版日期: 2021-10-27

STUDY ON QUANTITATIVE MODEL OF BUILDABILITY PERFORMANCE OF 3D PRINTED CONCRETE

SHI Qingxuan^1,2,3,
WAN Shengmu^{2
, ,}

1. State Key Laboratory of Green Building in Western China, Xi'an University of Architecture & Technology, Xi'an 710055, China;
2. School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China;
3. Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education(XAUAT), Xi'an 710055, China

摘要

摘要: 为量化三维（3D）打印混凝土建造性能，根据其在泵送、挤出和沉积过程中的流变特性，建立了基于打印混凝土屈服应力和自重应力作用下的强度破坏模型。该量化模型依据Mohr-Coulomb屈服准则，并结合Tresca破坏理论，适于预测打印结构产生塑性屈服时的失效层数。同时因其假定底层加载速率线性化，故该模型为产生保守预测的下限模型，并通过文献中已有试验数据及模型共同验证了其正确性。又考虑到各层均会在上部沉积层重力作用下产生压缩变形，根据Hook定律预测了打印结束后结构总压缩变形量。
- 3D打印混凝土 /
- 建造性能 /
- 流变特性 /
- 量化模型 /
- 压缩变形
Abstract: To quantify the buildability performance of 3D printed concrete, according to its rheological characteristics during pumping, extrusion and deposition, a strength failure model based on yield stress and self-weight stress of printing concrete was established. Based on Mohr-Coulomb yield criterion and Tresca failure theory, the quantitative model was suitable for predicting the number of failure layers when plastic yield occurred. At the same time, because it assumed that the loading rate of botton layer was linearized, the model was a lower bound model for conservative prediction, and its correctness was verified by the existing test data and model in the literature. Considering that each layer might produce compression deformation under the gravity of the upper deposited layer, the total compression deformation of the structure after printing was predicted according to Hook's law.
- 3D printed concrete /
- buildability performance /
- rheological properties /
- quantitative model /
- compression deformation

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参考文献(25)

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