冷轧带肋钢筋混凝土受弯构件的疲劳界限配筋率  

Critical Fatigue Reinforcement Ratio of Concrete Beams Reinforced by Cold-rolled Deformed Steel Bar

作　　者：彭艺斌[1] 陈浩军[1] 

机构地区：[1]长沙交通学院桥梁与结构工程系,湖南长沙410076

出　　处：《长沙交通学院学报》2003年第3期55-58,共4页Journal of Changsha Communications University

基　　金：交通部"九五"重点研究资助项目(95-04-03-31)

摘　　要：对配有不同配筋率的冷轧带肋钢筋混凝土简支标准梁(550mm×150mm×150mm)进行了等幅疲劳荷载试验研究,试件配筋率分别为0%、0.29%、0.487%、0.934%和1.946%。这批试件的疲劳破坏形式为折断破坏、弯拉破坏和剪压破坏。针对不同的疲劳破坏形式,提出了两个疲劳破坏界限配筋率的概念,并推导了可供配筋混凝土路面设计参考的疲劳破坏界限配筋率。Simply supported concrete beams loaded by equal amplitude fatigue loading were studied. These beams were reinforced by cold-rolled deformed steel bar and made with different reinforcement ratio of 0%, 0.29%, 0.487%, 0.934% and 1.946%, respectively. The fatigue failure types of the beams were of broken failure, bending-tensile failure and shear-compression failure. Analyzing the different fatigue failure types of the beams, two concepts of critical fatigue reinforcement ratios were offered and inferred. The critical fatigue reinforcement ratios can be referenced in the design of reinforced concrete pavement.

关 键 词：冷轧带肋钢筋 混凝土受弯构件 疲劳荷载 疲劳界限配筋率 

分 类 号：TU375[建筑科学—结构工程]