高强钢绞线与工程水泥基复合材料黏结性能试验  

Experiments on bond performance between high-strength steel wire strands and engineered cementitious composites

作　　者：李可[1] 李思辰 周擎威 王新玲[1] LI Ke;LI Si-chen;ZHOU Qing-wei;WANG Xin-ling(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China;Hangzhou Ronghao Real Estate Co.Ltd.,Hangzhou 311215,China)

机构地区：[1]郑州大学土木工程学院,郑州450001 [2]杭州融浩置业有限公司,杭州311215

出　　处：《沈阳工业大学学报》2022年第6期706-713,共8页Journal of Shenyang University of Technology

基　　金：国家自然科学基金委河南省联合基金项目(U1804137);中国博士后基金项目(2020M672236);住房和城乡建设部科学技术计划项目(2019-K-059).

摘　　要：为研究高强钢绞线与工程水泥基复合材料的黏结性能,考虑钢绞线直径、相对锚固长度、加固层厚度及ECC抗压强度的影响,对84个棱柱体与12个薄板试件进行单轴拉拔试验.结果表明:拉拔荷载滑移曲线呈现三阶段变化规律;减小钢绞线直径或相对锚固长度,或者增加ECC抗压强度,可以提高平均黏结强度;钢绞线在ECC中的临界保护层厚度为其直径的3.7倍.提出了考虑多因素的高强不锈钢绞线与ECC平均黏结强度及临界锚固长度计算公式,与试验结果吻合良好.In order to investigate the bond properties of high-strength steel wire strands in engineered cementitious composites(ECC),a total of 84 prismatic specimens and 12 thin plate specimens were subjected to uniaxial pull-out tests with consideration for the effects of steel strand diameter,anchorage length,protective layer thickness and ECC compressive strength.The results show that the pulling load-slip curve exhibits a three-stage variation law.The average bond strength can be enhanced by decreasing the steel strand diameter and relative anchorage length,or by increasing ECC compressive strength.The critical thickness of protective layer cover of high-strength steel wire strands in ECC is 3.7 times as the diameter of wire strands.Considering the effects of multiple factors,the calculation formulas of average bond strength and critical anchorage length were proposed for high-strength steel wire strands of ECC in good agreement with test results.

关 键 词：高强钢绞线 工程水泥基复合材料 黏结性能 拉拔试验 黏结强度 锚固长度 黏结滑移关系 临界保护层厚度 

分 类 号：TU528[建筑科学—建筑技术科学]