混凝土的非线性损伤爬行模型,考虑温度的影响及其参数变化规律分析
1School of Civil Engineering, Liaodong University, Dandong, China.
PloS one
|July 7, 2025
概括
这项研究引入了一种新的非线性爬行模型用于使用碎形理论的混凝土,准确地预测各种温度和应力下的爬行行为. 该模型有效地捕捉了加速的爬行阶段,克服了传统方法的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 应用数学 应用数学 应用数学
背景情况:
- 混凝土的爬行是结构完整性的关键因素,特别是在不同的热条件下.
- 传统的爬行模型很难准确地表示加速爬行阶段和内部损伤.
- 了解爬行行为对于长期的结构性能和安全至关重要.
研究的目的:
- 开发和验证一个非线性爬行模型用于混凝土使用分数顺序导数理论.
- 分析温度和应力对混凝土爬行参数的影响.
- 提高爬行预测的准确性,特别是在加速爬行阶段.
主要方法:
- 在不同的温度下对混凝土样本进行了单轴爬行测试.
- 使用碎形顺序导数理论建立了一个非线性爬行模型.
- 爬行参数是基于经典的爬行曲线和方程来计算的.
- 分析了在不同压力和温度条件下模型参数的变化.
主要成果:
- 开发的基于碎形的模型准确地复制了各种温度和应力水平的混凝土爬行曲线.
- 该模型在捕捉爬行法则方面表现出强大的适应性和精度.
- 它有效地解决了传统模型在描述加速爬行和内部损坏积累方面的局限性.
- 关键参数,如弹性模量,粘度系数和碎形顺序被确定为控制爬行行为.
结论:
- 拟议的非线性爬行模型在不同的热和应力条件下为混凝土提供了更高的准确性和适用性.
- 分数顺序导数理论为模拟复杂的爬行现象提供了一个强大的框架.
- 这一进步对于实际的工程应用是有价值的,特别是在预测长期的混凝土行为和结构恶化方面.
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