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.
出处
《土木工程学报》
EI
CSCD
北大核心
1997年第5期37-42,共6页
China Civil Engineering Journal
关键词
高强混凝土结构
简支梁
疲劳强度
疲劳变形
high-strength concrete,simply supported beam, fatigue strength, fatigue defomation.
