桁梁局部破断试验中动位移的数字图像测量  

Digital Image Processing Technique for Dynamic Displacement in Truss-Beam Local Failure Test

作　　者：李玲[1] 涂熙[1] 王磊[1] 陈以一[2] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]同济大学土木工程防灾国家重点试验室,上海200092

出　　处：《结构工程师》2010年第1期113-117,共5页Structural Engineers

基　　金：高等学校博士学科点专项科研基金(20060247034)

摘　　要：将数字图像测量技术应用于桁梁结构局部破断试验中结构动位移的测量。对目标测点标记亮斑并布置对比度较强的背景,采用高清晰摄影机在结构破坏过程中采集图像,使用Matlab编制程序对目标点亮斑进行识别,计算其在图像中位置的变化并输出目标点位移曲线。试验结果显示,按该方法可获得符合实际的测点位移数据,具有较高的可行性;另经静载试验验证,可获得相对于破坏试验中较大位移而言可接受的精度。The digital image processing technique was applied to dynamic displacement measurement in trussbeam local failure test. In the structural model test, light spots were labelled on measuring points and high- contrast ratio background were arranged, then images were collected by high definition camera and identified with computer program designed in Matlab for light spots,whose locations change in the image were calculated, and finally the displacement curves were obtained. This method is verified feasible with displacement data comform to reality by the local failure test of a truss structure, and shows acceptable measuring accuracy relatively to large dynamic diapalcement in failure test,which is verified by static load tests.

关 键 词：数字图像技术 非接触测量 数据处理 动位移 局部破坏试验 

分 类 号：TU198[建筑科学—建筑理论]