摘要
基于混凝土中钢筋均匀锈蚀及锈蚀产物仅仅填充且填满锈胀裂缝的假设,考虑混凝土与钢筋介面锈蚀前后的变形协调条件,以及保护层裂纹界面的部分承载能力,建立了带箍筋混凝土构件锈胀开裂模型,并通过直流阳极极化加速锈蚀试验对模型进行了验证.对于箍筋间距100 mm及150 mm两种工况,裂纹宽度实测值与模型预测值具有较好的一致性.
Corrosive expanding crack model for concrete members with stirrup is proposed, after hypothesizing that reinforced bars in concrete members are corroded uniformly and the corrosive expanding cracks will be filled fully by the corrosive products from reinforced bars and considering that the corrosive displacement compatibility condition of the interface between reinforced bar and protective layer before/after corrosion and the partial carrying capacity of the crack interfaces in protective layer concrete. The model was verified by the straight flow anodic polarization accelerates corrosion test results. For the stirrups with the space of 100mm and 150mm under the operation conditions, the measured crack expanding widths agree with the predicted ones.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第9期25-27,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50278039
50578068)
湖北省教育厅科研项目(200614002)
武汉市晨光计划资助项目(20055003059-29)
关键词
箍筋
混凝土构件
锈胀模型
stirrup
concrete building unit
corrosive expanding model
