同济大学学报（自然科学版）2012，Vol.40Issue(6)：906-913,8.DOI:10.3969/j.issn.0253-374x.2012.06.018
模型再生混凝土单轴受压应力分布特征
Stress Distribution Characteristics of Modeled Recycled Aggregate Concrete Under Uniaxial Compression
摘要
Abstract
Based on the mechanical properties of each material phase in recycled aggregate concrete (RAO, a two-dimensional modeled RAC was built, and the stress distribution characteristics of the modeled RAC under uniaxial compressive were obtained by meso-level numerical analysis. A parametric analysis was conducted to investigate the sensitivity of the stress distribution of the modeled RAC, which focused on different mechanical parameters of natural aggregate, interfacial transition zone (ITZ) and old hardened mortar. Results show that a concentration of tensile stress and shear stress produces at new and old interfacial transition zones between the natural aggregates. The higher elastic modulus of natural aggregates are, the higher the magnitude of stress concentration is, and the higher elastic modulus of the interfacial transition are, the lower the magnitude of stress concentration is. Whereas the effects of the elastic modulus of old hardened mortar on stress concentration are not evident.关键词
模型再生混凝土/细观/界面过渡区/老硬化砂浆/有限元分析Key words
modeled recycled aggregate concrete/ mesolevel/interfacial transition zone/old hardened mortar/ finite element analysis分类
建筑与水利引用本文复制引用
李文贵,肖建庄,袁俊强..模型再生混凝土单轴受压应力分布特征[J].同济大学学报（自然科学版）,2012,40(6):906-913,8.基金项目
教育部新世纪优秀人才支持计划(NCET-06-0383),国家自然科学基金(51178340) （NCET-06-0383）
