【摘要】 从弹性与弹塑性损伤、各向同性与各向异性损伤、静力与动力损伤、宏观唯象以及细观和微观损伤、局部化与非局部化损伤5个层面介绍了国内外在混凝土损伤类本构关系领域的研究历史和进展情况,并对涉及本构关系的损伤演化规律、本构数值方法、损伤物理机理等内容进行了讨论.从对比分析可以看出弹性以及各向同性损伤模型的构建简便、计算成本低,弹塑性损伤模型适于模拟不可恢复变形,各向异性和微、细观损伤模型能更客观而全面地描述混凝土非线性物理机制,非局部化损伤模型在模拟应变局部化现象以及克服网格依赖性方面具有优势等.通过分析各类模型的建立方法、基本特征、适用范围等,架构起空间多维视角的研究框架,揭示出该领域一些热点问题,并对其研究前景进行了展望.更多还原

【Abstract】 The research history and developments in the realm of damage constitutive relation of concrete are introduced from the five perspectives,including elastic and elasto-plastic damage,isotropic and anisotropic damage,static and dynamic damage,macro and micro-meso damage,as well as local and non-local damage.The issues of damage evolvement,numerical methods and physical mechanism are also discussed.The contrastive analyses demonstrate that elastic and isotropic damage model is characterized with simple constructions and low computation costs,elasto-plastic damage model is suitable for simulation of irreversible deformations,anisotropic and micro-meso damage model more objectively and comprehensively describes nonlinear physical mechanisms of concrete,and non-local damage model has advantages in terms of simulation of strain localization and elimination of mesh sensitivity.By means of analyzing the construction approaches,basic characteristics and application spheres of various models,a research framework with spatial multi-dimensional perspectives is constructed,the key issues in this field are disclosed and the research prospects are predicted.更多还原