钢绞线与水泥基复合材料局部黏结滑移模型  

Local bond-slip model between steel strand and engineered cementitious composites

作　　者：朱俊涛[1] 张凯[1] 邹旭岩 李可[1] 张普[1] ZHU Juntao;ZHANG Kai;ZOU Xuyan;LI Ke;ZHANG Pu(School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;School of Civil Engineering, Zhengzhou Institute of Technology, Zhengzhou 450044, China)

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]郑州工程技术学院土木工程学院,河南郑州450044

出　　处：《哈尔滨工程大学学报》2022年第4期541-548,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51708511,51879243,U1804137);住房和城乡建设部科学技术计划(2019-K-059);中国博士后基金项目(2020M672236).

摘　　要：为了解决由于钢绞线类黏结滑移试验的局限性,无法直接获得锚固长度内各点的实际黏结滑移关系的问题,本文建立了基于加载端位移的高强钢绞线与工程水泥基复合材料局部黏结-滑移关系模型。基于微元法,结合高强钢绞线与工程水泥基复合材料平均黏结-滑移关系模型,采用试验、理论计算和数值模拟方法,对建立的局部黏结滑移模型相关参数进行对比分析。结果表明:局部黏结-滑移模型的计算结果和数值模拟结果在验证点(自由端和加载端)处与试验结果吻合良好;与平均黏结-滑移关系模型相比,局部黏结-滑移关系模型可表征锚固长度范围内各点的黏结滑移特征,且具有更好的精确性和适用性。The actual bond-slip relationship at different anchoring depths cannot be directly obtained because of the limitations of the steel strand bond-slip test.Thus,a local bond-slip relationship model of high-strength steel strand and ECC based on the slip of the loading end is proposed.This model is based on the infinitesimal method combined with the average bond-slip relationship model of high-strength stainless steel strand and ECC.The relevant parameters of the local bond-slip relationship model are compared and analyzed through experiments,theoretical calculation,and numerical simulation.Results show that the experimental results of the load-slip of the free end and the loading end of the specimen agree well with the numerical simulation results and the theoretical calculation results calculated by the local bond-slip relationship model.Compared with the average bond-slip relationship model,the local bond-slip relationship model can characterize the bond-slip force characteristics at different anchoring depths more accurately,and the local bond-slip relationship model has better accuracy and applicability.

关 键 词：工程水泥基复合材料 高强钢绞线 拉拔试验 微元法 数值模拟 理论分析 黏结滑移 锚固长度 

分 类 号：TU528[建筑科学—建筑技术科学]