基于格构模型理论的单纤维拉拔试验建模及仿真

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (5): 1850-1858.

所属专题：水泥混凝土

基于格构模型理论的单纤维拉拔试验建模及仿真

赵翔鹏¹, 李辉², 杨青原³, 刘元珍⁴, 葛智¹, 姜能栋¹, 张洪智¹

1.山东大学齐鲁交通学院,济南 250100;
2.中科智岩(山东)科技发展有限公司,临沂 277712;
3.济青高速铁路有限公司, 济南 250100;
4.太原理工大学土木工程学院,太原 030024

收稿日期:2023-10-08 修订日期:2024-02-23 出版日期:2024-05-15 发布日期:2024-06-06
通信作者: 姜能栋,博士研究生。E-mail:jiangnengdong@mail.sdu.edu.cn
作者简介:赵翔鹏(1999—),男,硕士研究生。主要从事绿色智能混凝土的研究。E-mail:923026850@qq.com
基金资助:
山东省泰山产业领军人才工程(tscy20230660);国家自然科学基金(52008234);山东省泰山学者青年专家计划(tsgn201909032)

Establishment and Simulation of Single Fiber Pull-Out Test Based on Lattice Model Theory

ZHAO Xiangpeng¹, LI Hui², YANG Qingyuan³, LIU Yuanzhen⁴, GE Zhi¹, JIANG Nengdong¹, ZHANG Hongzhi¹

1. School of Qilu Transportation, Shandong University, Jinan 250100, China;
2. Zhongke Zhiyan (Shandong) Science and Technology Development Co., Ltd., Linyi 277712, China;
3. Jiqing High Speed Railway Co., Ltd., Jinan 250100, China;
4. School of Civil Engneering, Taiyuan University of Technology, Taiyuan 030024, China

Received:2023-10-08 Revised:2024-02-23 Online:2024-05-15 Published:2024-06-06

摘要/Abstract

摘要： 水泥基材料的单纤维拉拔试验对测试仪器要求较高,试验操作难度大,很多实验室不具备测试能力。针对该问题,采用格构模型理论建立模型,基于分段步进式方法,对单纤维拔出过程进行数值仿真,得到纤维拉拔荷载-位移响应曲线。通过文献中的试验数据对模型进行验证,发现该模拟方法可以模拟单纤维拉拔过程及荷载-位移曲线。进一步,通过模型研究纤维方向、弹性模量和水泥-纤维界面黏结强度对于拉拔荷载-位移响应曲线的影响。模拟结果可用于研究不同边界条件下各种因素对试验结果的影响,计算工程水泥基复合材料单裂缝桥接关系,为高韧性工程水泥基材料设计提供参考。

关键词: 工程水泥基复合材料, 格构模型, 纤维单拔, 拉拔荷载-位移, 纤维方向, 界面黏结强度

Abstract: The single fiber pull-out test of cement-based materials requires mechanical loading instruments with high precise, but the test operation is complicated, thus many laboratories do not have the ability to test. In order to slove this question, the discrete lattice model was adopted to simulate the pull-out process of single fiber from cementitious matrix using the stepwise method, and the fiber pull-out load-displacement response curve was obtained. The model was verified by the experimental data in the literature, and it is found that the simulation method can simulate the single fiber pull-out process and load-displacement curve. The influences of fiber direction, elastic modulus of fiber and interfacial bond strength on the pull-out load-displacement response curve were investigated using the model. The simulation results can be further used to study the influences of various factors on test results under different boundary conditions. The simulated results can be used to calculate the single-crack fiber bridging relationship of engineered cement-based composite, providing theoretical support for design of high toughness engineering cement-based composites.

Key words: engineering cement-based composite, lattice model, fiber single pull-out, pull-out load-displacement, fiber direction, interfacial bond strength

中图分类号:

TU528

赵翔鹏, 李辉, 杨青原, 刘元珍, 葛智, 姜能栋, 张洪智. 基于格构模型理论的单纤维拉拔试验建模及仿真[J]. 硅酸盐通报, 2024, 43(5): 1850-1858.

ZHAO Xiangpeng, LI Hui, YANG Qingyuan, LIU Yuanzhen, GE Zhi, JIANG Nengdong, ZHANG Hongzhi. Establishment and Simulation of Single Fiber Pull-Out Test Based on Lattice Model Theory[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(5): 1850-1858.

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基于格构模型理论的单纤维拉拔试验建模及仿真

Establishment and Simulation of Single Fiber Pull-Out Test Based on Lattice Model Theory

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