单向拉伸荷载下环形钢筋锚固性能试验研究  

Experimental Study on Anchorage Performance of Circular Rebar under Pullout Load

作　　者：张文江[1] 刘晓玉 苏胜昔[1] 杜二霞[1] 王小会[1] 阎宇杰[1] 

机构地区：[1]河北大学建筑工程学院,保定071002 [2]保定市建工集团,071000

出　　处：《混凝土与水泥制品》2015年第11期45-48,共4页China Concrete and Cement Products

基　　金：河北省博士科研启动基金项目(2013-261)

摘　　要：基于对7个钢筋锚固试件在静力作用下的拔出试验,研究了环形钢筋在单向拉拔荷载下的锚固性能。根据试验中得到的钢筋应变分布特征、外部混凝土的破坏现象、承载力以及滑移特点,揭示了环形钢筋在不同弧度、不同混凝土保护层、核心加强等多种因素影响下承载力和变形特征的差别以及传力机理的差别。试验结果表明,当锚固钢筋埋入混凝土部分采用弧形、环形构造时,在混凝土保护层厚度满足要求下,钢筋的锚固承载力与直线形钢筋相当,环形钢筋的初始加载变形略大,而后期拉拔承载力在发生较大位移的情况下没有明显的退化。Based on the test of 7 reinforced anchorage specimens under static pullout,the anchorage properties of circular rebar under the pullout loads has been studied. According to the analysis of the test results including strain distribution of rebar, failure characteristic of outer concrete, bearing capacity and slipping, the different strength, different deformation as well as different load transfer mechanism of circular rebar is revealed under influence of various factors such as the radian of circular rebar, the thickness of concrete cover and core strengthen method. The test results show that the anchoring capability of circular rebar or arc rebar is closed to that of straight rebar when it is adopted as anchorage part, and deformation under initial loading is bigger than that of straight rebar, but the deterioration of bearing capacity is not found after large deformation of rebar.

关 键 词：拉拔试验 锚固 环形钢筋 

分 类 号：TU528.79[建筑科学—建筑技术科学]