布拉格光纤光栅用于标准钢筋试件应变传感和弹性模量测量的实验研究  

Experimental Measurement of the Strain and Young's Modulus of Elasticity of the Standard Reinforcing Steel Bar Based on Fiber Bragg Gratings

作　　者：陈少华[1] 赵启大[1] 赵路明[1] 董孝义[1] 李欣[2] 张大煦[2] 

机构地区：[1]南开大学现代光学所,天津300071 [2]天津市建筑科学研究院,300193

出　　处：《应用激光》2004年第2期66-68,76,共4页Applied Laser

基　　金：国家自然基金 ( 6 99770 0 6 );天津市自然科学基金重点项目( 0 1380 0 5 11);教育部博士点基金( 2 0 0 2 0 0 5 5 0 36 )

摘　　要：利用两组布拉格光纤光栅 (FiberBraggGrating ,FBG)FBG1和FBG2对标准钢筋试件的应变和弹性模量进行了测量 ,并与电阻应变片的实验结果进行了对比。FBG1、FBG2和电阻应变片的应变测量灵敏度分别约为 1/ 14 5 .6、1/ 15 5 .8和 1/14 1.5 με/吨 ,理论值为 1/ 15 6 .86 με/吨 ;测量钢筋试件弹性模量分别为 2 .2 12× 10 5、2 .0 35× 10 5和 2 .2 73× 10 5Mpa,而理论值为 2 .0 3× 10 5Mpa。结果表明 ,作为测量应变的常用仪器 ,FBG比电阻应变片的实用性能更为优越。The strain and Young's modulus of elasticity of the standard reinforcing steel bar have been measured based on FBG1 and FBG2, and they have been experimentally compared with those founded on the strain gauge. The strain sensitivity on the FBG1, FBG2 and strain gauge are 1/145.6, 1/155.8 and 1/141.5 με per ton, with a theoretical sensitivity of 1/156.86με per ton; and elastic mode are measured to be 2.212×10 5?2.035×10 5和2.273×10 5Mpa, whereas the theoretical one is 2.03×10 5Mpa. All of the above have presented more excellent properties of the FBG of strain sensing.

关 键 词：布拉格光纤光栅 标准钢筋试件 应变传感 弹性模量 电阻应变片 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN253[自动化与计算机技术—控制科学与工程]