摘要
通过对目前已有试验资料的总结,分析了钢筋锈蚀对混凝土截面几何损伤、力学性能劣化、延性劣化的影响,并给出了混凝土截面几何损伤的表示方法和损伤混凝土力学性能劣化系数、延性折减系数以及锈蚀钢筋混凝土粘结滑移劣化系数的计算公式。针对锈蚀钢筋混凝土应变协调关系不满足平截面假定的特征,建立了锈蚀钢筋应变和相应位置处混凝土应变的几何关系。
Based on existing test data, tile influence of reinforcement corrosion on geometrical damage of concrete cross-section, mechanical properties degradation and ductility degradation of concrete are studied, then, representation of concrete cross-section geometrical damage and calculating formulas for the damaged concrete deterioration factor of mechanical properties, reduction factor of ductility, bond-slip deterioration factor of corroded reinforced concrete are proposed. Based on the fact that plane cross-section assumption of strain coordination relation of corroded steel bar and concrete doesn＇t exist, the geometric relationship of strain between corroded steel bar and concrete in the relevant position is derived.
出处
《四川建筑科学研究》
2013年第4期108-111,159,共5页
Sichuan Building Science
基金
国家自然科学基金项目(51178470)
关键词
混凝土
钢筋锈蚀
力学性能
粘结滑移
劣化
concrete
reinforcement corrosion
mechanical property
bond-slip
degradation
