集中荷载作用下受拉钢筋暴露的钢筋混凝土梁变形性能分析  

Behavior of inflection of RC beams with exposed tensile reinforcement under concentrated load

作　　者：李文[1] 张素梅[2] 姚华[3] 王本智[4] 

机构地区：[1]大庆石油学院土木建筑工程学院,黑龙江大庆163318 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [3]大庆油田天宇工程设计有限责任公司,黑龙江大庆163453 [4]大庆石油管理局钻井二公司,黑龙江大庆163712

出　　处：《大庆石油学院学报》2004年第2期122-125,共4页Journal of Daqing Petroleum Institute

基　　金：黑龙江省教育厅科技项目 ( 10 5 3 10 42 )

摘　　要：采用数值分析方法 ,利用计算程序 ,在忽略梁剪切变形的基础上 ,讨论了集中荷载作用下受拉钢筋暴露的钢筋混凝土简支梁的变形性能 ;分析了集中荷载位置、开口的宽度和高度、受拉钢筋的配筋率、混凝土强度、是否配架立筋等因素对开口梁变形性能的影响。结果表明 ,开口梁残余承载力等于实体梁的极限承载力时 ,在极限荷载作用下 ,开口梁的挠度大于实体梁的挠度 ,但增加幅度不明显 ;反之则小于实体梁挠度 ,且随开口梁承载力的减小挠度不断降低。According to the numerical analytical theory suggested in this paper, based on the assumption of deflection and ignored shear inflection, a discussion is carried out about the effect of various parameters (the loading position of concentrated load, width and height of exposed main reinforcement, percentage area of reinforcement in beam section, strength of concrete, if or no minimal top steel is used, distance of the end of exposed reinforcement from the left support) on the inflection of RC beams with exposed tensile reinforcement under concentrated load. Although there is a little part that the inflection of disrepaired beams is larger than inflection of ontic beams, but the increscent extent is very little. Except this condition, the inflection of disrepaired beams is smaller than that of ontic beams. It provides a better understanding of the behavior of inflection of RC beams with exposed tensile reinforcement in the reinforced construction.

关 键 词：钢筋暴露 钢筋混凝土梁 集中荷载 变形性能 

分 类 号：TU375.1[建筑科学—结构工程]