TY - GEN
T1 - Effect of residual strain on sensing property of FRP-OFBG smart rebar
AU - Zhang, Zhichun
AU - Zhou, Zhi
AU - Wang, Chuan
AU - Ou, Jinping
PY - 2007
Y1 - 2007
N2 - FRP-OFBG smart rebar is the smart structure material, which is the integration of good mechanical property and sensing performance. And FRP-OFBG rebar can be widely used in civil engineering health monitoring. But in the smart rebar application procedure, there is large residual strain exiting in FBG in smart rebar, and multiple-peaked to FBG reflection spectrum, which affect the sensing performance of smart rebar. In this paper, it's theoretically analyzed using FBG to measure the residual strain in FRP after fabrication; In smart rebar pultrusion fabrication processing, the strain and temperature were monitored by two connecting FBGs. It's analyzed FRP fabrication processing through monitoring data; To the multiple-peaked smart rebar, which caused by nonuniform residual strain distributing along FBG length, post thermal treatment was done. The result proved that thermal treatment can improve the spectrum of smart rebar and remove the multiple-peaked phenomenon of smart rebar. But the thermal treatment can't relief the residual strain, and further research about how long will the residual strain recovery at room temperature must be done.
AB - FRP-OFBG smart rebar is the smart structure material, which is the integration of good mechanical property and sensing performance. And FRP-OFBG rebar can be widely used in civil engineering health monitoring. But in the smart rebar application procedure, there is large residual strain exiting in FBG in smart rebar, and multiple-peaked to FBG reflection spectrum, which affect the sensing performance of smart rebar. In this paper, it's theoretically analyzed using FBG to measure the residual strain in FRP after fabrication; In smart rebar pultrusion fabrication processing, the strain and temperature were monitored by two connecting FBGs. It's analyzed FRP fabrication processing through monitoring data; To the multiple-peaked smart rebar, which caused by nonuniform residual strain distributing along FBG length, post thermal treatment was done. The result proved that thermal treatment can improve the spectrum of smart rebar and remove the multiple-peaked phenomenon of smart rebar. But the thermal treatment can't relief the residual strain, and further research about how long will the residual strain recovery at room temperature must be done.
KW - FRP-OFBG smart rebar
KW - Post thermal treatment
KW - Residual strain
KW - Residual strain recovery
UR - https://www.scopus.com/pages/publications/35548959565
U2 - 10.1117/12.716033
DO - 10.1117/12.716033
M3 - 会议稿件
AN - SCOPUS:35548959565
SN - 0819466506
SN - 9780819466501
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2007
T2 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2007
Y2 - 19 March 2007 through 22 March 2007
ER -