建筑结构学报2013，Vol.34Issue(8)：142-149,8.
钢筋钢纤维高强混凝土梁疲劳试验研究及刚度计算
Fatigue test and stiffness calculation of steel fiber reinforced high-strength concrete beams with reinforcements
摘要
Abstract
Based on the tests of one high-strength concrete beam and twelve steel fiber reinforced high-strength concrete beams under static and fatigue load,the behavior of deflection and stiffness of steel fiber reinforced highstrength concrete beams with reinforcements under static and fatigue load was analyzed.The influences of fatigue stress characteristic,steel fiber types,steel fiber volume fraction,depth of steel fiber layer and concrete strength on the stiffness of steel fiber reinforced high-strength concrete beams with reinforcements were investigated.The results show that the addition of steel fiber into high strength concrete beams can restrain stiffness degradation and control the deformation effectively,the deflection of steel fiber reinforced high-strength concrete beams with reinforcements decreases by 19.0％ ～69.1％ under static load and by 15.0％ ～61.0％ under fatigue load respectively.Based on the test results and theoretical analysis,the calculating method and formulas of stiffness of steel fiber reinforced highstrength concrete beams with reinforcements are proposed,which consider the influences of fatigue stress characteristic and steel fiber volume fraction on stiffness.It is shown that the calculating result by the stiffness formulas in this paper agrees well with the experimental data.关键词
高强混凝土梁/钢纤维/疲劳试验/变形性能/刚度Key words
high-strength concrete beam/ steel fiber/ fatigue test/ deformation performance/ stiffness分类
建筑与水利引用本文复制引用
高丹盈,张明,朱海堂..钢筋钢纤维高强混凝土梁疲劳试验研究及刚度计算[J].建筑结构学报,2013,34(8):142-149,8.基金项目
国家自然科学基金项目(50678159). （50678159）
