HRB500箍筋约束混凝土柱的极限承载力分析  

THE ULTIMATE BEARING CAPACITY ANALYSIS OF THE CONCRETE COLUMN WITH HRB500 HOOP

作　　者：何怡群[1] 杨俊杰[1] 

机构地区：[1]浙江工业大学建筑工程学院,杭州310032

出　　处：《工业建筑》2010年第S1期818-822,共5页Industrial Construction

基　　金：浙江省建设厅;财政厅"2007年建设科技资金"资助项目(浙财建字[2007]182号)

摘　　要：随着高强度钢筋的推广使用,HRB500钢筋将被广泛应用于柱箍筋,以提高柱的强度和延性。根据已有的受约束混凝土的本构关系,对使用HRB500高强钢筋作为箍筋的矩形截面和圆形截面混凝土柱的轴压承载力进行理论分析,提出相关承载力的计算方法。最后,将计算结果与用现行规范计算得到的承载力进行对比,得出使用HRB500箍筋后,混凝土结构柱承载力的提高是明显的。但应对现行规范在箍筋间距、保护层厚度的取值等方面应适当加以调整,以保证高强度箍筋的作用得以很好发挥。With the promotion of the use of high-strength steel bars,HRB500 steel bars will be widely used as column hoops to improve the column's strength and ductility.Based on the constitutive relationship of the confined concrete,the analysis of axial compression bearing capacity of the circular and rectangled concrete columns with HRB500 hoop is investigated,and the calculated method of the bearing capacity is presented.Finally,the result obtained by the proposed calculated method is compared with the design strengths calculated by using the building codes to show that using HRB500 hoop can obviously improve the bearing capacity of concrete columns.However the spacing of stirrups and the thickness of the cover concrete which are ruled by the existing building codes should be properly adjusted to ensure that the using of high-strength stirrups will be effectively.

关 键 词：HRB500箍筋 约束混凝土 有效约束系数 受压承载力 

分 类 号：TU375.3[建筑科学—结构工程]