摘要
残余应力的现场检测对确保钢结构安全性、可靠性有着非常重要的意义。为了简化盲孔法的检测步骤,使之可以更为方便地应用于现场既有钢结构的检测工作中,引入了数字图像相关方法(Digital Image Correlation,简称DIC)测量钻孔后的释放应变,代替盲孔法中传统的应变测试方法。形成了一种钻盲孔结合DIC非接触式全应变场测量的检测方法,即DIC-盲孔法。分别介绍了盲孔法、DIC方法基本原理及近几年提出的DIC-盲孔法原理、国内外研究进展与发展趋势。从已有的试验研究来看,DIC-盲孔法已经可以较为精确地检测出盲孔释放中心点处残余应力的大小,该方法应用于现场检测优势明显。
Field residual stress detection plays an important role in ensuring safety and reliability of steel structures. In order to simplify the testing procedure of conventional hole-drilling method and make it more convenient to be applied in field detection on steel structures,digital image correlation （DIC） is used to measure the deformation caused by localized stress associated with hole drilling. This is referred to as DIC-hole drilling methodology. With a focus on research progress and developmental trends,this paper provides a state-of-the-art overview on the hole-drilling method, DIC principle and newly proposed DIC hole drilling method. Based on current experimental studies,DIC-hole drilling method is proved to be capable of detecting residual stress accurately,and thus this method is recommended for on-site detection.
出处
《建筑钢结构进展》
北大核心
2014年第3期37-44,共8页
Progress in Steel Building Structures
关键词
残余应力
盲孔法
数字图像相关方法
现场检测
residual stress
hole drilling method
digital image correlation
field detection
