一个基于液压压力机制及其应用的新混凝土结解损害模型
Lantian Xu1, Yuchi Wang2, Yuanzhan Wang1
1State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Jinnan District, 135 Yaguan Road, Tianjin 300072, China.
Materials (Basel, Switzerland)
|August 14, 2025
概括
一个新的模型使用液压理论和相对动态弹性模量来量化混凝土融损伤. 该模型准确地预测了寒冷地区的损坏,考虑了初始缺陷和空气含量,以提高耐用性.
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
- 材料的耐用性 材料的耐用性
背景情况:
- 冰解损伤对在寒冷气候下混凝土的耐用性产生重大影响.
- 量化解周期造成的具体损害是一个关键的研究挑战.
- 现有的模型可能无法完全捕捉混凝土中复杂的缺陷发展.
研究的目的:
- 为混凝土冷解损害提出一种新的定量模型.
- 为了确定融损伤与相对动态弹性模量之间的关系.
- 用实验数据验证模型的准确性和适用性.
主要方法:
- 基于液压压力理论和缺陷发展,开发了一种新的混凝土冷解损伤模型.
- 导出了与相对动态弹性模量 (RDEM) 作为缺陷指标的融损伤相关的方程.
- 对混凝土进行了融循环测试,其空气含量不同,以验证基于RDEM的模型.
- 将空气含量的影响纳入最终的冷解损伤模型.
主要成果:
- 拟议的模型表明,总缺陷是初始缺陷和缺陷发展能力的函数.
- 实验验证使用RDEM测量证实了模型的合理性.
- 该模型包含空气含量,显示出高精度和普遍适用性.
- 该模型提供了一种可靠的工具,用于预测混凝土融损坏.
结论:
- 开发的冷解损害模型为评估混凝土退化提供了一种实用且具有物理意义的方法.
- 该模型的准确性和广泛适用性得到实验数据和外部验证的支持.
- 这项研究为预测混凝土结构在寒冷环境中的耐用性提供了宝贵的支持.
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