撒布式钢纤维再生混凝土梁的延性与耗能  

Ductility and Energy Dissipation of Layered Steel-fiber Recycled Concrete Beam

作　　者：唐佳军 裴长春[1] TANG Jiajun;PEI Changchun(College of Engineering,Yanbian University,Yanji 133002,China)

机构地区：[1]延边大学工学院

出　　处：《人民珠江》2020年第2期129-133,共5页Pearl River

摘　　要：根据1组普通再生混凝土梁与11组撒布式钢纤维再生混凝土梁的荷载-挠度曲线,分析了不同钢纤维撒布层数、钢纤维层撒布量与纵筋配筋率情况下梁的延性与耗能。结果表明:位移延性系数与耗能能力随钢纤维撒布层数增加的变化规律不明显,其中L6-S1.5-R16组梁的位移延性系数较基准组增大8.8%,耗能能力增强41.8%,效果较好;随着钢纤维层撒布量的增多,位移延性系数增大4.1%,耗能能力增强4.8%;随着纵筋配筋率的增大,位移延性系数增大36.0%,耗能能力增强85.1%。当钢纤维撒布层数较大,跨中位置撒布较多,加载点处撒布较少时,梁的延性与耗能能力较好。Based on the load-deflection curves of a group of ordinary recycled concrete beam and 11 groups of layered steel-fiber recycled concrete beams,this paper analyzes the ductility and energy consumption of concrete beams with different steel fiber layers,steel fiber contents and longitudinal reinforcement ratio.The results show that:(1)The variation of displacement ductility coefficient and energy dissipation capacity with the increase of steel fiber layers is not obvious.The displacement ductility coefficient of group L6-S1.5-R16 is 8.8%higher than that of the reference group,and the energy dissipation capacity is 41.8%higher.(2)With the increase of steel fiber content,the displacement ductility coefficient increases by 4.1%and the energy dissipation capacity increases by 4.8%.(3)With the increase of longitudinal reinforcement ratio,the displacement ductility coefficient increases by 36.0%and energy dissipation capacity increases by 85.1%.It can be concluded that the ductility and energy dissipation capacity of the beam are better when the number of steel fiber layers is larger,the amount of steel fibers is larger in the middle position and the amount of steel fibers is smaller at the loading point.

关 键 词：再生混凝土梁 撒布式钢纤维 配筋率 位移延性系数 耗能 

分 类 号：TU375.1[建筑科学—结构工程]