摘要
建筑物真实的服役状态是承受的荷载与环境的同时作用。概述了目前关于混凝土在疲劳荷载与环境因素耦合作用下的损伤劣化规律的研究。从材料、结构角度对疲劳荷载和腐蚀介质的耦合作用进行了总结与分析。重点论述了严寒地区桥梁、高速铁路等在疲劳荷载和冻融循环耦合作用下的损伤劣化特征。阐述了目前广泛采用的间接耦合作用方式——交替作用存在的问题,并提出从与材料细观结构密切相关的内应力角度,同时结合疲劳效应解决这一问题的可能办法。
The coupling effect of mechanical loads and environmental actions is a real service state of concrete. Recent studies on the damage and deterioration of concrete experiencing fatigue load and environmental effects are summarized. The coupling effect of fatigue and erosive ions is introduced on the level of material and structure. The damage and deterioration of concrete as bridge, highway in cold climates subjected to dynamic load and frost cycles are outlined. The latent problems associated with the popular methods for the simulation of the coupling effect are analyzed. The approach to solve the problems is proposed from the view point of microstructure related to the internal stress of concrete combined with fatigue effect.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第12期2142-2149,共8页
Journal of The Chinese Ceramic Society
基金
国家"973"环境友好型现代混凝土的基础研究(2009CB623200)
国家"863"高速铁路用钢筋混凝土研究(2008AA030794)资助项目
关键词
疲劳荷载
环境因素
耦合作用
损伤劣化
冻融循环
fatigue load
environmental
factor coupling
damage and deterioration
frost cycles
