高速数字图像相关法在化学螺栓混凝土拉拔试验中的应用  

Application of high⁃speed digital image correlation method in pull⁃out test of chemical bolt and concrete

作　　者：张云鲁 孟兆丰 侯帆 付用全 ZHANG Yunlu;MENG Zhaofeng;HOU Fan;FU Yongquan(Department of Civil Engineering,School of Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院土木工程系,青岛266100

出　　处：《建筑结构》2024年第3期82-89,共8页Building Structure

基　　金：中国公安部交通管理研究所经费(2020ZDSYSKFKT07);中央高校基本科研业务费项目。

摘　　要：提出了一种基于高速数字图像相关方法对混凝土中化学螺栓进行拉拔的试验方案,可用于捕捉和分析化学螺栓与混凝土间的变形发展和破坏形态。为实现直接观测化学螺栓与混凝土界面位移和应变场,采用半模试件进行试验研究。为证明其可行性,将半模试件与全模试件的粘结-滑移响应进行对比。结果证明,半模试件与全模试件具有一致的粘结-滑移响应,可以用来研究化学螺栓与混凝土界面的粘结机理。最后,利用高速摄像机捕捉混凝土破坏时刻的图像,通过数字图像相关法技术对采集的图像进行分析,直接测量了化学螺栓从混凝土中破坏时界面的位移和应变。A pull⁃out test scheme of chemical bolt in concrete based on high⁃speed digital image correlation method is proposed,which can capture and analyze the deformation development and failure mode between chemical bolt and concrete.In order to achieve direct observation of the displacement and strain fields at the chemical bolt⁃concrete interface,a half⁃mould specimen was used for the test.To demonstrate its feasibility,the bond⁃slip response of the half⁃mould specimens were compared with those of the full⁃mould specimens.The results show that the bond⁃slip response of the half⁃mould specimens are similar to that of the full⁃mould specimens,which can be used to study the bond mechanism at the chemical bolt⁃concrete interface.Finally,the high⁃speed camera was used to capture the images of concrete failure time,and digital image correlation method technology was used to analyze the collected images,so as to successfully measure the displacement and strain of the interface during the destruction of chemical bolts from concrete.

关 键 词：拉拔试验 单根化学螺栓 高速相机 数字图像相关法 

分 类 号：TU398.7[建筑科学—结构工程]