梁纵向钢筋的滑移及其引起的梁端位移  

THE STUDY OF BEAM BAR SLIP AND CORRESPONDING BEAM END DISPLACEMENT

作　　者：李宏[1] 李峰[1] 

机构地区：[1]西安建筑科技大学建筑工程系

出　　处：《工业建筑》1998年第7期27-29,20,共4页Industrial Construction

摘　　要：在地震作用下，钢筋混凝土框架梁纵向钢筋的粘结滑移，加剧了结构的变形，因而对滑移及其引起的变形的研究成为弯折钢筋锚固设计的关键。文章通过对足尺框架边节点试件梁纵向钢筋滑移的量测，发现滑移随梁端位移的增加而突增，因纵筋直径的增加而增加，且反复荷载作用下较重复荷载作用滑移值大。通过对因滑移引起的梁端位移的分析计算认为，随着钢筋直径的增加，因滑移引起的位移及与总位移的比值越来越大；随μ值的增加，滑移引起的位移增加，但与总位移的比值不再继续增加。Under seismis actions, the deformation of RC frames is intensified by the bond slip of longitudinal bars in beams. Hence, reaserching the slip deformation of beams is the key to the anchorage design of hooked bars. Through measuring the slip of longitudinal bars in beams of some exterior joint specimin with full sire, the author found that the slip increases with the increment of the beam ends deformation abruptly and with the incremeat of the diameter of bars. And the slip under cyclic loads is more serious than that under repeated loads. According to the analysis and calculation of the beam ends deformation caused by slip, it is considered that the ratio of the deformation caused by slip to the total deformation increases with the increasment of the diameter of bars. And the deformation caused by slip also increases with the increasment of μ,while its percentage of the total deformation no longer increases.

关 键 词：框架边节点 滑移 梁端位移 钢筋混凝土梁 

分 类 号：TU375.101[建筑科学—结构工程]