工程水泥基复合材料中高强不锈钢丝网搭接性能的试验研究

Experimental Study on Lap-Spliced Performance of High-Strength Stainless Steel Wire Mesh in Engineering Cementitious Composites.

作者信息

Zou Xuyan, Zhang Xiyuan, Li Ziyuan, Zhu Juntao

机构信息

School of Civil Engineering, Zhengzhou University of Technology, Zhengzhou 450044, China.

School of Water Conservancy and Civil Engineering, Zhengzhou University, Zhengzhou 450001, China.

出版信息

Materials (Basel). 2023 May 25;16(11):3959. doi: 10.3390/ma16113959.

DOI:10.3390/ma16113959

PMID:37297091

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10254666/

Abstract

To investigate the mechanical properties of high-strength stainless steel wire mesh (HSSSWM) in Engineering Cementitious Composites (ECCs) and determine a reasonable lap length, a total of 39 specimens in 13 sets were designed and fabricated by considering the diameter of the steel strand, spacing of the transverse steel strand, and lap length. The lap-spliced performance of the specimens was tested through a pull-out test. The results revealed two failure modes in the lap connection of steel wire mesh in ECCs: pull-out failure and rupture failure. The spacing of the transverse steel strand had little effect on the ultimate pull-out force, but it restricted the slip of the longitudinal steel strand. A positive correlation was found between the spacing of the transverse steel strand and the slip amount of the longitudinal steel strand. With an increase in lap length, the slip amount and 'lap stiffness' to peak load increased, while the ultimate bond strength decreased. Based on the experimental analysis, a calculation formula for lap strength considering the correction coefficient was established.

摘要

为研究高强不锈钢丝网（HSSSWM）在工程水泥基复合材料（ECCs）中的力学性能并确定合理的搭接长度，考虑钢绞线直径、横向钢绞线间距和搭接长度，共设计制作了13组39个试件。通过拉拔试验对试件的搭接拼接性能进行了测试。结果表明，ECCs中钢丝网搭接连接存在两种破坏模式：拉拔破坏和断裂破坏。横向钢绞线间距对极限拉拔力影响较小，但限制了纵向钢绞线的滑移。横向钢绞线间距与纵向钢绞线滑移量呈正相关。随着搭接长度的增加，达到峰值荷载时的滑移量和“搭接刚度”增大，而极限粘结强度降低。基于试验分析，建立了考虑修正系数的搭接强度计算公式。