不同应力比下锈蚀钢筋混凝土梁承载力试验研究  

Load Carrying Capacity of Concrete Structures with Corroded Reinforcement in Different Load Levels

作　　者：滕海文[1,2] 周乐云[1] 杨森茂[1] 舒正昌[1] 霍达[1,2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《建筑科学》2010年第11期56-58,共3页Building Science

基　　金：国家自然科学基金(50808005);国家科技支持计划项目(2006BAJ27B04);北京市科技计划课题(Y060506000007022);北京市自然科学基金重大项目(8100001)

摘　　要：通过对不同应力比下钢筋混凝土梁锈蚀量的对比试验,研究了荷载对钢筋混凝土结构中钢筋锈蚀及钢筋混凝土梁承载力的影响。试验过程中施加持续荷载,各梁应力比分别为0、0.2、0.4,通过外加电流及浸泡于5%的NaCl溶液中进行加速锈蚀。试验结果表明,应力比对钢筋锈蚀及钢筋土梁承载力有影响,应力比越大,钢筋锈蚀就越严重,梁出现裂缝时的承载力及极限承载力越小。Based on testing of corroded reinforced concrete beams in different load levels and comparison with three control beams,this paper presents the effects of mechanical loading on the corrosion of reinforcing steel and the steel mass loss rate.Beams specimens were subjected to the sustained load corresponding to stress ratio of 0,0.2,and 0.4 respectively by using external power supply and 5% NaCl chloride solution during the corrosion test process.Test results show that the load level has an effect on the load carrying capacity of the tested beams.And the higher the load level,the larger the steel mass loss rate and the lower the load carrying capacity of the tested beams is when cracks emerge on the beams.

关 键 词：钢筋混凝土梁 锈蚀 不同应力比 承载力 

分 类 号：TU375.1[建筑科学—结构工程] TU317