高强混凝土梁抗弯疲劳性能的试验研究  

EXPERIMENTAL RESEARCH ON BENDING FATIGUE BEHAVIOR OF HIGH-STRENGTH CONCRETE BEAMS

作　　者：李秀芬[1] 吴佩刚[1] 赵光仪[1] 

机构地区：[1]清华大学

出　　处：《土木工程学报》1997年第5期37-42,共6页China Civil Engineering Journal

摘　　要：本文通过对11根配有新Ⅲ级钢(20MnSiv)的高强混凝土简支梁的静载和等幅疲劳荷载试验,分析研究了受弯构件的疲劳特性,给出了压区混凝土应力,纵向受拉钢筋应力的计算方法及钢筋的疲劳强度设计值,得到了作为控制梁的疲劳承载能力极限状态的S-N曲线,并提出高强混凝土受弯构件在等幅疲劳荷载作用下正截面疲劳设计方法.Tn this paper, 11 beams reinforced by a new kind of steel ( 20MnSiv ) have been tested under static loading and fatigue loading with constant amplitudes. The fatigue behavior of flexural member has been studied. The calculation method of concrete strain on the edge of compressive zone and the tensile stress of longitudinal reinforcements and fatigue strength design value of rein-forcments, as well as S-N relationship for governing the fatigue Ultimate state of beam have been put forward. Finally,the fatigue bending design method for high strength concrete member under constant amplitude loading have been suggested.

关 键 词：高强混凝土结构 简支梁 疲劳强度 疲劳变形 

分 类 号：TU375.101[建筑科学—结构工程]