预测回收混凝土的弹性模块,考虑到材料不均性:中等尺度数值方法
Jing Zhang1,2, Xuejun Zhu3, Mingyuan Zhou2
1Department of Architecture and Engineering, Yancheng Polytechnic College, Yancheng 224005, China.
Materials (Basel, Switzerland)
|January 23, 2024
概括
一个新的中尺度模型准确地预测了回收混凝土的弹性模量. 该方法考虑了聚合物特性和空隙含量,为结构工程应用提供了低成本,高精度的替代方案.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 结构工程 结构工程
背景情况:
- 评估回收混凝土的弹性模量对于结构稳定性和资源利用是至关重要的.
- 现有的理论和实验方法在成本和精度方面存在局限性.
- 了解构成材料和微观结构特征的影响至关重要.
研究的目的:
- 为预测回收混凝土的弹性模量提出一种新的,低成本的,高精度的中等尺度模型.
- 为了研究粗聚合物,接触面,凝材料和气泡对弹性模量的影响.
- 通过实验结果验证拟议的模型.
主要方法:
- 介面尺度综合重建与模拟方法 (IRSM) 模型的开发.
- 在IRSM模型中包含识别,重建,模拟和蒙特卡洛过程.
- 使用皮尔森系数进行参数分析,以确定因素对弹性模量的影响.
主要成果:
- IRSM模型准确地重建了粗聚合物的几何特征和积累.
- 与实验结果相比,模型预测的错误率低于5%,验证了它的合理性.
- 影响弹性模块的关键因素是:水泥弹性模块,粗聚合物弹性模块,粗聚合物含量,空气空隙含量,接触面弹性模块和接触面厚度.
结论:
- 拟议的IRSM模型为预测回收混凝土弹性模量提供了可靠和高效的工具.
- 空气空隙含量和接触面厚度对弹性模量产生负面影响.
- 因素影响混凝土的抗变形能力,主要是通过"力链"调整,影响力转移,路径数和完整性.
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