超强韧性混凝土与钢筋黏结性能研究  

Research on bond properties of rebar and PP ECC

作　　者：于明鑫[1,2] 俞家欢[3] YU Mingxin;YU Jiahuan(Department of Civil Engineering Shenyang Urban Construction University,Shenyang 110167,China;School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;Research Team of New Building Materials and Structures,Shenyang Urban Construction University,Shenyang 110167,China)

机构地区：[1]沈阳城市建设学院土木工程系,辽宁沈阳110167 [2]沈阳城市建设学院新型建筑材料与结构科研团队,辽宁沈阳110167 [3]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《混凝土》2018年第10期57-61,共5页Concrete

基　　金：国家自然科学基金资助项目(51478276);2016年度沈阳城市建设学院科研发展基金项目(XKJ2016001)

摘　　要：通过超强韧性混凝土(PP ECC)与钢筋的黏结性能试验,分析黏结滑移曲线特点,研究了黏结强度的影响因素。结果显示,黏结强度随着随着钢筋埋长的增大而减小,随着钢筋直径的增加而降低;PP ECC中的PP纤维能够提高钢筋与水泥基材料的极限黏结强度,提高极限黏结强度所对应的滑移值。通过试验结果分析,得出PP ECC与钢筋的连续曲线黏结滑移模型。It studied the bond properties of rebar and PP ECC.The bond-slip curve characteristics and influencing factors of bond strength were also analysis.The results show that adhesive strength decreased as anchorage length and the diameters of the rebar increased.Mixing certain amount of PP fibers into the composite could increase the limit bond strength of rebar and PP ECC,and increase the value of the slip corresponding to the limit bond strength,improve bond ductility.The experience formula for calculating bond strength were acquired based on the results.The bond-slip curve constitutive model of rebar and PP ECC accorded with continuous curve model was also found.

关 键 词：超强韧性混凝土 黏结性能 黏结长度 滑移 黏结-滑移模型 

分 类 号：TU528.01[建筑科学—建筑技术科学]