索结构施工监控中的索力测试方法研究
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摘要
提出了一种基于光纤光栅传感网络系统的索力测量方法.这是一种间接的测量方法,其适用条件在于:结构中使用的拉索一般都是在弹性范围内工作,此时索力与索头上的应变存在一定的关系.利用这种关系,可以在拉索生产后将光纤光栅应变传感器焊接于索头某处,然后对索进行拉力试验标定,绘制出索中拉力与传感器波长变化的关系曲线,这样就可以在施工现场通过读取传感器的波长变化从而推导出索力的变化.本文列举目前常用的索力测量手段,分析其各自的适用范围和局限性;介绍光纤光栅传感网络系统的工作原理,提出将其应用于索力测量的设想;以某实际工程为例,介绍并详细分析对于两种不同构造的拉索,如何采用本方法进行索力测量;最后总结了本方法的适用性以及尚待改进的问题.
In this paper,a measuring method of cable force based on fiber grating sensor network system is put forward,which is a kind of indirect measuring method.It is applicable when cable is commonly in elastic range.Based on the relationship of cable force and strain of cable head,the curve for the cable fore and sensor wavelength changes could be drawn by test.So through reading the wavelength of sensors in the construction site,the changes of cable force can be deduced.Some currently commony used measuring methods of cable force are introduced first.Their applicable scopes and limitations are discussed respectively.The working principle of fiber grating sensor network system is then introduced,and the ideas for using it in cable force measurement are put forward.Followed that,a practical engineering example is given,and how to measure cable force for different kinds of cable is analyzed in detail.The applicability and fields needing improvement for this method are finally summarized.
In this paper,a measuring method of cable force based on fiber grating sensor network system is put forward,which is a kind of indirect measuring method.It is applicable when cable is commonly in elastic range.Based on the relationship of cable force and strain of cable head,the curve for the cable fore and sensor wavelength changes could be drawn by test.So through reading the wavelength of sensors in the construction site,the changes of cable force can be deduced.Some currently commony used measuring methods of cable force are introduced first.Their applicable scopes and limitations are discussed respectively.The working principle of fiber grating sensor network system is then introduced,and the ideas for using it in cable force measurement are put forward.Followed that,a practical engineering example is given,and how to measure cable force for different kinds of cable is analyzed in detail.The applicability and fields needing improvement for this method are finally summarized.
引文
[1]郝超,裴岷山,强士中.斜拉桥索力测试新方法—磁通量法[J].公路,2000,(11):30-31.HAO Chao,PEI Min-shan,QIANGShi-zhong.Magnet-ic flux method-a new method for monitoring the force ofstayed cable[J].Highway,2000,(11):30-31.
[2]何祖发,郭良友.脉动法在测量斜拉桥索力中的应用[J].城市道桥与防洪,1996,(2):32-36.HE Zu-fa,GUO Liang-you.Application of Microseismmethod in the cable force measurement of cable—stayedbridges[J].Urban Roads Bridges&Flood Control,1996,(2):32-36.
[3]王朝华,李国蔚,何祖发,等.斜拉桥索力测量的影响因素分析[J].世界桥梁,2004,(3):64-67.WANG Chao-hua,LI GUO wei,HE Zu-fa,et al.Analysisof influential factors in cable force measurement of cable-stayed bridges[J].World Bridges,2004,(3):64-67.
[4]朱金国,陈宣民.频率法测定拉索索力[J].安徽建筑,2003,(2):84-85.ZHUJin-guo,CHEN Xuan-min.Measurement of cableforce using frequency method[J].Anhui Architecture,2003,(2):84-85.
[5]胡利平,凌育洪.脉动法索力测量技术及相关参数分析[J].中南公路工程,2004,29(4):47-49.HU Li-ping,LING Yu-hong.Measurement techniquesof cable force using microseism method and parameteranalyses[J].Highway Engineering,2004,29(4):47-49.
[6]刘胜春,姜德生,郝义昶.光纤光栅测力传感器的研究及应用[J].武汉理工大学学报,2006,30(2):209-211.LI U Shen-gchun,JIANG Des-heng,HAO Yi-chang.Application and research of load cell based FBG sensors[J].Journal of Wuhan University of Technology,2006,30(2):209-211.
[7]肖德宝.张拉索膜结构的索力测试方法与施工过程计算模拟[R].广州:华南理工大学,2007.XIAO De-bao.Research on the Measuring Method ofCable Tension and Construction Si mulation for Cable-Membrane Structures[R].Guangzhou:South China U-niversity of Technology,2007(5)
[8]张戌社,杜彦良,孙宝臣.基于光纤光栅的斜拉索振动参数监测实验研究[J].中国安全科学学报,2004,14(7):98-100.ZNANG Xu-she,DU Yan-liang,SUN Bao-chen.On-line monitoring method for stayed-cables dynamic re-sponse based on fiber bragg grating[J].China SafetyScience Journal,2004,14(7):98-100.
[9]张戌社,杜彦良,孙宝臣.光纤Bragg光栅传感器实现斜拉桥索力实时监测的研究[J].中国安全科学学报,2003,13(7):77-79.ZHANG Xu-she,DU Yan-liang,SUN Bao-chen.Studyin monitoring of cables tension with fiber bragg sensor[J].China Safety Science Journal,2003,13(7):77-79.
[10]张戌社,杜彦良.光纤光栅压力传感器在斜拉索索力监测中的应用研究[J].铁道学报,2002,24(6):47-49.ZHANG XU-she,DU Yan-liang.Application of opti-cal fiber grating pressure sensor on monitoring of cablestension[J].Journal of the China Rail way Society,2002,24(6):47-49.
[11]岳增国.大跨度空间结构的损伤检测与诊断研究[D].天津:天津大学,2005.YUE Zeng-guo.Study of the Damage Detection and Di-agnosis of Large Space Structures[D].Tianjin:TianjinUniversity,2005.
[12]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90.LI Hong-nan,LI Dong-sheng.Safety assessment,healthmonitoring and damage diagnosis for structures in civil en-gineering[J].Earthquake Engineering and Engineering Vi-bration,2002,22(3):82-90.
[13]HU Xiao-feng,SHENTON H.W.Ⅲ.Damage identifi-cation based on deadload redistribution:effect of measure-ment error[J].Journal of Structural Engineering,2006,132(8):1264-1273.
[14]林启鹏,王帆.佛山世纪莲体育场索膜屋盖施工现场监测[J].工程建设与设计,2007,(7):84-89.LIN Qi-peng,WANG Fan.Summary and analysis a-bout roof construction monitoring of Foshan CenturyLotus Stadium[J].Construction&Design for Project,2007,(7):84-89.
[2]何祖发,郭良友.脉动法在测量斜拉桥索力中的应用[J].城市道桥与防洪,1996,(2):32-36.HE Zu-fa,GUO Liang-you.Application of Microseismmethod in the cable force measurement of cable—stayedbridges[J].Urban Roads Bridges&Flood Control,1996,(2):32-36.
[3]王朝华,李国蔚,何祖发,等.斜拉桥索力测量的影响因素分析[J].世界桥梁,2004,(3):64-67.WANG Chao-hua,LI GUO wei,HE Zu-fa,et al.Analysisof influential factors in cable force measurement of cable-stayed bridges[J].World Bridges,2004,(3):64-67.
[4]朱金国,陈宣民.频率法测定拉索索力[J].安徽建筑,2003,(2):84-85.ZHUJin-guo,CHEN Xuan-min.Measurement of cableforce using frequency method[J].Anhui Architecture,2003,(2):84-85.
[5]胡利平,凌育洪.脉动法索力测量技术及相关参数分析[J].中南公路工程,2004,29(4):47-49.HU Li-ping,LING Yu-hong.Measurement techniquesof cable force using microseism method and parameteranalyses[J].Highway Engineering,2004,29(4):47-49.
[6]刘胜春,姜德生,郝义昶.光纤光栅测力传感器的研究及应用[J].武汉理工大学学报,2006,30(2):209-211.LI U Shen-gchun,JIANG Des-heng,HAO Yi-chang.Application and research of load cell based FBG sensors[J].Journal of Wuhan University of Technology,2006,30(2):209-211.
[7]肖德宝.张拉索膜结构的索力测试方法与施工过程计算模拟[R].广州:华南理工大学,2007.XIAO De-bao.Research on the Measuring Method ofCable Tension and Construction Si mulation for Cable-Membrane Structures[R].Guangzhou:South China U-niversity of Technology,2007(5)
[8]张戌社,杜彦良,孙宝臣.基于光纤光栅的斜拉索振动参数监测实验研究[J].中国安全科学学报,2004,14(7):98-100.ZNANG Xu-she,DU Yan-liang,SUN Bao-chen.On-line monitoring method for stayed-cables dynamic re-sponse based on fiber bragg grating[J].China SafetyScience Journal,2004,14(7):98-100.
[9]张戌社,杜彦良,孙宝臣.光纤Bragg光栅传感器实现斜拉桥索力实时监测的研究[J].中国安全科学学报,2003,13(7):77-79.ZHANG Xu-she,DU Yan-liang,SUN Bao-chen.Studyin monitoring of cables tension with fiber bragg sensor[J].China Safety Science Journal,2003,13(7):77-79.
[10]张戌社,杜彦良.光纤光栅压力传感器在斜拉索索力监测中的应用研究[J].铁道学报,2002,24(6):47-49.ZHANG XU-she,DU Yan-liang.Application of opti-cal fiber grating pressure sensor on monitoring of cablestension[J].Journal of the China Rail way Society,2002,24(6):47-49.
[11]岳增国.大跨度空间结构的损伤检测与诊断研究[D].天津:天津大学,2005.YUE Zeng-guo.Study of the Damage Detection and Di-agnosis of Large Space Structures[D].Tianjin:TianjinUniversity,2005.
[12]李宏男,李东升.土木工程结构安全性评估、健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90.LI Hong-nan,LI Dong-sheng.Safety assessment,healthmonitoring and damage diagnosis for structures in civil en-gineering[J].Earthquake Engineering and Engineering Vi-bration,2002,22(3):82-90.
[13]HU Xiao-feng,SHENTON H.W.Ⅲ.Damage identifi-cation based on deadload redistribution:effect of measure-ment error[J].Journal of Structural Engineering,2006,132(8):1264-1273.
[14]林启鹏,王帆.佛山世纪莲体育场索膜屋盖施工现场监测[J].工程建设与设计,2007,(7):84-89.LIN Qi-peng,WANG Fan.Summary and analysis a-bout roof construction monitoring of Foshan CenturyLotus Stadium[J].Construction&Design for Project,2007,(7):84-89.
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