锈蚀钢筋混凝土梁疲劳刚度分析  

Fatigue stiffness analysis on corroded reinforced concrete

作　　者：虞爱平[1,2] 赵艳林[2] 

机构地区：[1]桂林理工大学广西矿冶与环境科学实验中心,广西桂林541004 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2013年第6期1277-1283,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家973计划项目专项(2010CB434810);广西科学研究与技术开发项目(桂科攻0992001-2)

摘　　要：为了考察不同锈蚀程度对钢筋混凝土梁疲劳后刚度的影响,设计了一组不同锈蚀率的钢筋混凝土试验梁,并对其进行了疲劳荷载试验。根据各试验梁的扰度,计算了各试验梁在疲劳后的刚度变化,并在此基础上对其进行了相应的试验分析。结果表明:在疲劳荷载作用下,即使是轻度锈蚀试件,其刚度损失率也较大,为9.2%;且随着锈蚀程度的增加,试件的挠度的增加幅度趋于加大,刚度急剧降低,中度锈蚀及重度锈蚀构件刚度损失率分别为23.9%和40.3%。In order to investigate the stiffness variation of reinforced concrete beam at different level of corrosion after fatigue, a group of reinforced concrete specimens were designed with different cor- rosion rates, and a fatigue test was carried on these specimens. Based on the deflection of these specimens, the stiffness of specimens were calculated and analyzed. The results showed that the stiffness loss rate of specimens is as high as 9.2% , even though they have a little corrosion. With the increase of corrosion, the deflection tends to increase and the stiffness of specimens is drastically reduced. For the moderately and severely corroded specimens, the stiffness loss rates were 23.9% and 40. 3% , respectively.

关 键 词：钢筋混凝土梁 锈蚀率 刚度 

分 类 号：TU375.1[建筑科学—结构工程]