BFRP混凝土圆柱破坏全周监测与可靠性研究  

FULL-CIRCLE MONITORING AND STABILITY STUDY OF BFRP CONCRETE COLUMNS

作　　者：陈振宁[1] 刘聪[1] 戴云彤[1] 丁里宁[2] 何小元[1] 

机构地区：[1]东南大学工程力学系,南京210096 [2]东南大学土木工程系,南京210096

出　　处：《工程力学》2015年第12期147-153,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(11327201;11272089);中央高校基本科研业务费专项资金项目;江苏省普通高校研究生科研创新计划项目(KYLX_0092)

摘　　要：该文运用360°全周变形测量系统,跟踪玄武岩纤维增强复合材料(BFRP)包裹混凝土圆柱的破坏与变形。环向布置的8个相机组成4套三维数字图像相关(3D-DIC)子系统,离散化测量位于系统中央具有大曲率、大变形的BFRP混凝土圆柱。采取不同的硬件控制方式,实现八相机同步测量。通过确定系统测试范围、比较3D-DIC的应变计算结果与应变片数值,对该系统全周监测的可靠性进行研究。在BFRP包裹的混凝土圆柱抗压性能实验中,对圆柱任意位置的变形和破坏进行监测。结果表明:360°全周变形测量系统能够有效地监测BFRP包裹的混凝土圆柱任意位置的破坏,实现大变形测量。A 360° full-circle deformation measurement system is applied for monitoring the destruction and deformation of the concrete columns packaged with basalt fiber reinforced plastic（BFRP）. This system is made up of four groups of three dimensional digital image correlation（3D-DIC） subsystems, consisting of eight cameras. By encircling the columns being tested in the middle, the system can measure these specimens, which are subjected to large deformation with large curvature, discretely. Different hardware control methods are adopted to capture pictures synchronously. Through an investigation of the view field and a comparison of the strain calculated by 3D-DIC with that measured by strain gauges, the stability of the system is tested and verified. In the compression experiments conducted on the concrete columns packaged with BFRP, full-circle monitoring of the destruction and deformation is obtained. The results show that 360° full-circle deformation measurement system can effectively track damage in concrete columns packaged with BFRP and meet the demands of large deformation measurement.

关 键 词：BFRP 八相机 全周变形 三维数字图像相关 应变测量 

分 类 号：TU528[建筑科学—建筑技术科学] O348[理学—固体力学]