高速铁路用HRBF500钢筋混凝土梁疲劳性能试验研究  

EXPERIMENTAL RESEARCH ON HRBF500 HIGH STRENGTH RC BEAMS FOR HIGH SPEED RAILWAY UNDER FATIGUE LOADING

作　　者：王新玲[1] 陈青萍[1] 杜琳[1] 

机构地区：[1]郑州大学土木工程学院,郑州450002

出　　处：《工业建筑》2010年第11期18-21,26,共5页Industrial Construction

基　　金：国家863计划资助项目(2008AA030704)

摘　　要：对配置500 MPa细晶粒(HRBF500)钢筋混凝土梁的疲劳性能的研究鲜见报道,设计、制作2根矩形和2根T形截面的HRBF500钢筋混凝土(C50)简支梁,并进行静力加载和疲劳试验。基于试验结果,分析了静载作用下不同截面形式和不同配筋率的梁受拉钢筋应变、跨中挠度以及梁裂缝发展规律,研究了钢筋应力幅值大于150 MPa时,各钢筋混凝土梁在疲劳荷载作用下的受力性能。结果表明,最大疲劳荷载和振幅是影响试验梁是否发生疲劳破坏的主要因素。The study on fatigue properties of HRBF500 high strength reinforced concrete structures is rarely reported.The two rectangle and two T-section HRBF500 R C beams are designed and produced.And the static loading and fatigue experiments are conducted on these specimens.Based on the experimental results,the tensile strain of the steel,midspan deflection and the cracks developing law are analyzed under the static loading on the specimen with different cross-section and steel ratio.The mechanical properties of the beams are evaluated when the steel stress is over 150 MPa under fatigue experiment.The test result shows that the maximum fatigue load and amplitude are the main factors to decide if fatigue failure would occur on the beam.

关 键 词：500MPa细晶粒钢筋 疲劳性能 试验研究 钢筋混凝土梁 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]