The research on the concrete structure built with self-healing materials brings inspiration to increase the safety and sustainability of underground structures in the whole life cycle. The utilization of microencapsulated healing agents in self-healing concrete has demonstrated efficacy in the repair of microcracks within concrete structures. Nevertheless, there exists a dearth of effective methodologies for assessing the impact of microcapsule parameters on the mechanical properties of self-healing concrete. This study introduces an innovative three-dimensional micromechanical model that can be utilized to analyze the micromechanical response of microencapsulated self-healing concrete under tensile loading conditions. The 3D micromechanical model is accomplished through the utilization of the elastic secant compliance tensor. Subsequently, a comprehensive examination is undertaken to analyze the progression of damage-healing in self-healing concrete incorporating microcapsules. Finally, a parametric investigation is conducted to elucidate the impact of the micro-parameters on the mechanical behavior of self-healing concrete. The present discovery holds significant implications for the development of microencapsulated self-healing concrete for underground structures, particularly in terms of establishing appropriate parameters.

中文翻译：

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用于预测微胶囊自修复混凝土完整应力-应变关系的 3D 微力学模型


自修复材料混凝土结构的研究为提高地下结构全生命周期的安全性和可持续性带来了启发。在自修复混凝土中使用微胶囊修复剂已证明在修复混凝土结构内的微裂纹方面具有功效。然而，缺乏有效的方法来评估微胶囊参数对自修复混凝土力学性能的影响。本研究引入了一种创新的三维微力学模型，可用于分析微胶囊自修复混凝土在拉伸载荷条件下的微力学响应。 3D 微机械模型是通过利用弹性割线柔量张量来完成的。随后，进行了全面的检查，以分析含有微胶囊的自修复混凝土的损伤修复过程。最后，进行参数研究以阐明微观参数对自修复混凝土力学行为的影响。目前的发现对于地下结构微胶囊自修复混凝土的开发具有重要意义，特别是在建立适当的参数方面。