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研究混凝土中爬行能量的演变特征和损伤构成模型的研究

Xiaodie Liu^1,2, Lei Cui^1,2, Zhixi Liu³

¹School of Architectural Engineering, Tongling University, Tongling, 244061, Anhui, China.

Scientific reports

|July 22, 2025

概括

这项关于混凝土的研究揭示了爬行过程中的能量演变. 弹性应变能量密度线性下降,而消散和输入能量密度随着时间的推移而增加,为新的构成模型提供信息.

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.
固体力学固体力学是什么

背景情况:

混凝土的爬行是结构完整性的关键因素.
了解在持续负载下混凝土中的能量转化是必不可少的.
混凝土具有改善材料性能和废物利用的潜力.

研究的目的:

为了研究在单轴爬行下在混凝土中能量进化规律.
建立混凝土的损坏构成模型,具有不同的替换比率.
分析爬行过程中能量转换和消散的机制.

主要方法:

在混凝土上使用单轴爬行卸载试验进行系统研究.
弹性应变能量密度 (u^e) 和散散应变能量密度 (u^d) 的分析.
基于能量消散的粘弹性-塑料-损伤合构成模型的开发.

主要成果:

弹性应变能量密度 (u^e) 表示随着爬行时间的线性减弱.
分散应变能量密度 (u^d) 和输入应变能量密度 (u) 逐步增加:衰变,均增长和加速增长.
u^d与u的比例随着爬行时间的增加而增加,在加速爬行时达到峰值,高含量降低了峰值时的比例.
提出了一种基于 u^e 线性衰减的新方法来计算爬行能量.

结论:

该研究提供了关于混凝土在爬行过程中的能量动态的见解.
一个经过验证的构成模型可以准确地预测混凝土的变形.
这些发现支持废旧轮胎的回收利用,并为混凝土爬行模型提供了新的方法.

关键词:

构成模型构成模型爬行的人爬行的人混凝土是一种混凝土.应变能量演变过程中的应变能量.

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