摘要
本文根据试验资料，分析了受腐蚀钢筋混凝土构件在荷载作用下开裂及裂纹的演化、分布特性，证明了受腐蚀钢筋混凝土构件表面裂缝具有分形特征。利用分形几何学研究受腐蚀钢筋混凝土构件开裂及破坏过程,讨论了受腐蚀钢筋混凝土构件表面裂缝的分维数与构件中混凝土及钢筋的腐蚀损伤程度之间的关系及其延性系数降低量之间的关系。研究表明该分维数可作为构件受腐蚀程度的衡量指标,并可用来评估不同腐蚀程度钢筋混凝土构件的力学性能，从而为受腐蚀钢筋混凝土构件的剩余寿命评价提供了一个新的途径,为受腐蚀钢筋混凝土结构的承载力研究建立了一定的理论基础。
It is verified that the surface cracks on the corroded reinforced concrete members take on the fractal behavior in the analysis of crack propagation using the experimental data. Fractal geometry is employed to investigate the cracking and failure process of the corroded reinforced concrete members. The relationships between the fractal dimension of surface cracks and the influence factors, which include compressive strength of corroded concrete, corrosion ratio of reinforcement and the ductility of the corroded member, are discussed respectively. As a result, the fractal dimension is proposed as an index to evaluate mechanical property of the corrosion degree of the corroded reinforced concrete members. A new approach is put forward to evaluate residual life of the corroded reinforced concrete members, which lays down a theoretical foundation for evaluation of bearing capacity of the corroded reinforced concrete structure.
出处
《工程力学》
EI
CSCD
北大核心
2002年第5期123-129,共7页
Engineering Mechanics
基金
国家自然科学基金资助项目(59378356)
