散斑图像相关数字技术在薄壁钢管混凝土长柱变形测量中的应用
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摘要
薄壁钢管混凝土构件作为新发展的组合构件,对其研究具有非常重要的意义。文中首先介绍了散斑图像相关数字技术的基本原理,然后给出了变形计算公式。为弥补传统测量方法的不足,在薄壁钢管混凝土长柱偏压破坏实验中,引入了散斑图像相关数字技术,对长柱跨中截面的全过程变形(位移)进行了测量,并对测量结果进行了分析与讨论,同时还与传统测量方法所得结果进行了对比分析。实验结果与分析表明:该方法具有较高的精度和工程可用性,可克服传统测量方法中的一些弊端,且对实验设备和测量环境要求不高,很适合现场非接触测量。
It is highly important to study the thin-walled concrete-filled steel tubular member which was a newly developed composite member.The basic principle of speckle image correlation digital technique was introduced firstly in this paper.And Calculation formula of deformation was also presented. In order to overcome the drawbacks of traditional measurement methods,the digital technique of speckle image correlation was used to measure the full-procedure displacements of thin-walled concrete-filled steel tubular long columns in the eccentrically loaded tests.The results of tests were analyzed and discussed in detail and compared with those measured by traditional measurement methods.The results of experiments and analysis indicate that the present method can be used to determine displacements with reasonable accuracy and avoid some abuses of traditional measurement methods besides the method has trivial requests for picturing equipments and experimental environment and is especially suitable for field non-contact measurement in close or long-distance range.
It is highly important to study the thin-walled concrete-filled steel tubular member which was a newly developed composite member.The basic principle of speckle image correlation digital technique was introduced firstly in this paper.And Calculation formula of deformation was also presented. In order to overcome the drawbacks of traditional measurement methods,the digital technique of speckle image correlation was used to measure the full-procedure displacements of thin-walled concrete-filled steel tubular long columns in the eccentrically loaded tests.The results of tests were analyzed and discussed in detail and compared with those measured by traditional measurement methods.The results of experiments and analysis indicate that the present method can be used to determine displacements with reasonable accuracy and avoid some abuses of traditional measurement methods besides the method has trivial requests for picturing equipments and experimental environment and is especially suitable for field non-contact measurement in close or long-distance range.
引文
[1]韩林海,钟善桐.钢管混凝土力学[M].大连:大连理工大学出版社,1995(Han Linhai,Zhong Shantong.Mechanics of Concrete Filled Steel Tube.Dalian:Dalian University of Technology Press,1995(in Chinese))
[2]韩林海.钢管混凝土结构[M].北京:科学出版社,2000(Han Linhai.Structures of Concrete Filled Steel Tube.Beijing:Science Press,2000(in Chinese))
[3]王秋萍.薄壁钢管混凝土轴压短柱力学性能的实验研究[D].哈尔滨:哈尔滨工业大学,2002(Wang Qiuping.Experimental Study on Mechanical behavior of Short Columns of Concrete-filled Thin-walled Steel Tube.Harbin:Harbin Institute of Technology,2002(in Chinese))
[4]王力尚,钱稼茹.钢管混凝土柱轴向受压承载能力实验研究[J].建筑结构,2003,33(7):46~49(Wang Lishang,Qian Jiaru.Experimental Study on Bearing Capacities of Axle Loaded Columns of Concrete-filled Steel Tube.Building Structure,2003,33(7):46~49(in Chinese))
[5]陆伟东,吕西林.方钢管混凝土压弯构件受力-变形过程分析[J].世界地震工程,2002,18(1):149~154(LuWeidong,Lv Xilin.An Analysis of Load-displacement Relationship of Concrete-filled Rectangular Steel TubularColumns.World Earthquake Engineering,2002,18(1):149~154(in Chinese))
[6]单宝华,欧进萍,赵仁孝等.散斑图像相关数字技术原理及应用[J].实验力学,2003,19(3):409~418(ShanBaohua,Ou Jinping,Zhao Renxiao,et al.Principles and Applications of Speckle Image Correlation DigitalTechnique.Journal of Experimental Mechanics,2003,19(3):409~418(in Chinese))
[7]何小元,衡伟,高卫.远距离、高精度二维动态位移测量[J].实验力学,1996,11(4):468~472(He Xiaoyuan,Heng Wei,Gao Wei.High Accurate Measurement for 2-Dimensional Displacements at Long Distance.Journal ofExperimental Mechanics,1996,11(4):468~472(in Chinese))
[8]王言磊.结构变形监测的散斑图像相关数字技术及其应用[D].哈尔滨:哈尔滨工业大学,2003(Wang Yanlei.Digital Technology of Speckle Image Correlation and its Applications in Structural Deformation Monitoring.Harbin:Harbin Institute of Technology,2003(in Chinese))
[2]韩林海.钢管混凝土结构[M].北京:科学出版社,2000(Han Linhai.Structures of Concrete Filled Steel Tube.Beijing:Science Press,2000(in Chinese))
[3]王秋萍.薄壁钢管混凝土轴压短柱力学性能的实验研究[D].哈尔滨:哈尔滨工业大学,2002(Wang Qiuping.Experimental Study on Mechanical behavior of Short Columns of Concrete-filled Thin-walled Steel Tube.Harbin:Harbin Institute of Technology,2002(in Chinese))
[4]王力尚,钱稼茹.钢管混凝土柱轴向受压承载能力实验研究[J].建筑结构,2003,33(7):46~49(Wang Lishang,Qian Jiaru.Experimental Study on Bearing Capacities of Axle Loaded Columns of Concrete-filled Steel Tube.Building Structure,2003,33(7):46~49(in Chinese))
[5]陆伟东,吕西林.方钢管混凝土压弯构件受力-变形过程分析[J].世界地震工程,2002,18(1):149~154(LuWeidong,Lv Xilin.An Analysis of Load-displacement Relationship of Concrete-filled Rectangular Steel TubularColumns.World Earthquake Engineering,2002,18(1):149~154(in Chinese))
[6]单宝华,欧进萍,赵仁孝等.散斑图像相关数字技术原理及应用[J].实验力学,2003,19(3):409~418(ShanBaohua,Ou Jinping,Zhao Renxiao,et al.Principles and Applications of Speckle Image Correlation DigitalTechnique.Journal of Experimental Mechanics,2003,19(3):409~418(in Chinese))
[7]何小元,衡伟,高卫.远距离、高精度二维动态位移测量[J].实验力学,1996,11(4):468~472(He Xiaoyuan,Heng Wei,Gao Wei.High Accurate Measurement for 2-Dimensional Displacements at Long Distance.Journal ofExperimental Mechanics,1996,11(4):468~472(in Chinese))
[8]王言磊.结构变形监测的散斑图像相关数字技术及其应用[D].哈尔滨:哈尔滨工业大学,2003(Wang Yanlei.Digital Technology of Speckle Image Correlation and its Applications in Structural Deformation Monitoring.Harbin:Harbin Institute of Technology,2003(in Chinese))
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