高强不锈钢绞线网在ECC中的搭接性能  

Performance of lap-spliced high strength stainless steel wire mesh in engineering cementitious composites

作　　者：朱俊涛[1] 赵奎 邹旭岩 王新玲[1] 李可[1] 张哲[1] ZHU Juntao;ZHAO Kui;ZOU Xuyan;WANG Xinling;LI Ke;ZHANG Zhe(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,P.R.China;School of Civil Engineering,Zhengzhou Institute of Technology,Zhengzhou 450044,P.R.China)

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

出　　处：《土木与环境工程学报（中英文）》2021年第3期174-182,共9页Journal of Civil and Environmental Engineering

基　　金：国家自然科学基金(51708511、51879243、U1804137);住房和城乡建设部科学技术计划(2019-K-059);河南省交通运输科技计划(2020J-2-7);河南省博士后基金(201902014)。

摘　　要：为探明高强不锈钢绞线网在工程水泥基复合材料(Engineering Cementitious Composites,ECC)中搭接连接的受力特性,并确定其合理的搭接长度,考虑横向钢绞线间距、搭接长度和钢绞线直径等影响因素,对设计制作的39个试件进行了拉拔试验。结果表明:钢绞线网在ECC中的搭接连接有钢绞线拔出和拉断两种破坏模式;横向钢绞线的设置对搭接时的极限拉拔力影响不大,但其滑移量随着横向钢绞线间距的减小而减小;随着搭接长度的增加,达到峰值荷载的滑移量和“搭接刚度”增加,而极限粘结应力则随之降低。通过试验分析,确定了钢绞线网的临界搭接长度,并建立了考虑修正系数β的搭接长度计算公式。In order to investigate the mechanical characteristics of high strength stainless steel wire mesh in Engineering Cementitious Composites(ECC)and to determine the reasonable lap length,the pullout tests of 39 specimens were carried out by considering the influential factors such as transverse strand spacing,lap length and strand diameter.The results show that there are two failure modes in the lap connection of steel wire mesh in ECC,namely pull out and pull off.The setting of transverse strand has little effect on the ultimate pull-out force,but the slip decreases with the decrease of the transverse strand spacing.With the increase of lap length,the slip amount and"lap stiffness"to peak load increase,while the ultimate bond stress decreases.Based on the experimental analysis,the critical lap length of steel wire mesh is determined,and the calculation formula of lap length considering the correction coefficientβis established.

关 键 词：不锈钢绞线网 工程水泥基复合材料 搭接性能 拉拔试验 搭接长度 

分 类 号：TU528.58[建筑科学—建筑技术科学]