混凝土中钢筋锈蚀深度预测模型试验研究  

An Experimental Study of the Prediction Model on the Rebar Corrosion Depth in Concrete

作　　者：费红芳[1] 艾天成[1] 

机构地区：[1]三峡大学土木与建筑学院,443002

出　　处：《灾害与防治工程》2010年第1期75-80,共6页Disaster and Control Engineering

摘　　要：通过长达2年的干湿循环试验,得到了48个锈蚀钢筋混凝土试件;采用数理统计相关知识,对试件的锈蚀特征进行了分析,建立了与保护层厚度、表面裂缝宽度、钢筋直径、混凝土强度等级及箍筋间距相关的混凝土中钢筋锈蚀深度预测模型;对模型进行参数敏感性分析表明,表面锈胀裂缝宽度是影响钢筋锈蚀深度的最主要因素,而较小的箍筋间距对纵向钢筋锈蚀深度也具有较明显影响;经试验数据验证表明,该模型具有较好的适用性。The wet-dry cycle test on 48 reinforced concrete specimens has been finished under natural conditions for two years.Using the knowledge of mathematical statistics,we analyze the corrosion characteristics of the sample,and establish a concrete prediction model of the protective layer thickness,surface cracks width,bar diameter,concrete strength grade and stirrup spacing related to the depth of steel corrosion.The sensitivity analysis of model parameter shows that crack width of the surface is the most important factor of the corrosive impact in the depth of steel corrosion,while the smaller stirrup spacing of steel corrosion on the vertical depth also has a significant effect.The experimental data show that the model has good applicability.

关 键 词：钢筋混凝土 锈蚀 干湿循环 箍筋 

分 类 号：TU755.7[建筑科学—建筑技术科学]