砌块专用砂浆-钢筋的黏结滑移本构关系研究  

Study on Bond-Slip Constitutive Relationship Between Special Masonry Mortar and Steel Bar

作　　者：陈萌[1] 马婷婷[2] 苗丽[3] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002 [2]周口师范学院,河南周口466000 [3]郑州大学水利与环境学院,河南郑州450002

出　　处：《铁道建筑》2017年第7期148-151,共4页Railway Engineering

基　　金：河南省省级新型墙体材料专项基金(豫财建[2012]430号)

摘　　要：通过4根内贴电阻应变片钢筋在砌块专用砂浆中的拉拔试验,得出试验构件的黏结应力沿锚固长度的分布曲线,分析黏结应力沿锚固长度的变化规律;通过量测的构件加载端相对滑移和自由端相对滑移,得出沿锚固长度的相对滑移变化曲线;给出试验构件不同锚固位置处的黏结应力与相对滑移变化曲线,在黏结应力与相对滑移的基本模式中引入黏结锚固位置函数,得出拉结钢筋在砌块专用砂浆中较为准确的黏结应力与相对滑移本构关系。The distribution of bond stress along the anchorage length of the test members was calculated by the pullout tests of 4 steel bars with internal resistance sheets in the special masonry mortar. The variation law of the bond stress along the anchorage length was analyzed. Through the measured relative slip of load end and the free end, the relative slip curve along the anchorage length was obtained. The bond stress and the relative slip curves at different anchoring positions of the test members were given. In the basic model of bond stress and relative slip, the bond-anchorage position function was introduced to obtain the more accurate bond stress and relative slip constitutive relationship of the tensile bar in the special masonry mortar.

关 键 词：材料工程 拉拔试验 专用砌筑砂浆 黏结锚固强度 黏结锚固位置函数 

分 类 号：TU375[建筑科学—结构工程]