计算力学学报2017，Vol.34Issue(5)：541-546,6.DOI:10.7511/jslx201705002
混凝土保护层锈胀开裂过程分析的细观刚体弹簧元模型
Mesoscale Rigid-Body-Spring Model for analyzing the crack propagation of concrete cover due to steel bar corrosion
摘要
Abstract
In order to obtain the crack propagation process and mechanical response of concrete cover induced by steel bar corrosion ,a numerical model based on the mesoscale Rigid-Body-Spring Model (RBSM ) was established in the present work .The results show that the crack pattern is in good agreement with the experimental observations ,and the model stiffness is similar to that obtained when the theoretical model for concrete composite materials ,w hile the peak averaged corrosion pressure calculated with a softening constitutive model for concrete is also similar to that of the theoretical model , thus the numerical model is yalidated .Then the effects of concrete cover thickness and steel bar diameter on mechanical response during the corrosion process were investigated .The results show that the peak corrosion pressure and displacement decrease with the decreasing concrete cover thickness .The increase in steel bar diameter will bring about the decrease of the peak corrosion pressure ,and the corresponding displacement presents a decreasing tendency on the w hole .关键词
混凝土保护层/钢筋锈蚀/裂缝扩展/细观刚体弹簧元法/数值模拟Key words
concrete cover/steel bar corrosion/crack propagation/mesoscale Rigid-Body-Spring Model/simulation分类
建筑与水利引用本文复制引用
梁永钦,王立成..混凝土保护层锈胀开裂过程分析的细观刚体弹簧元模型[J].计算力学学报,2017,34(5):541-546,6.基金项目
国家自然科学基金面上项目(51378090 ) （51378090 ）
国家重点基础研究发展计划(973 计划)(2015CB057703 （973 计划）
2015CB057701)资助项目 . （）
