The proposed desensitized encapsulation structure solved the problem that more than 5500με test range for FBG sensor.
The single steel wire with proposed FBG sensor tension test in laboratory before and after fatigue experiment showed the
rationality and reliability of sensor structure. A scheme using desensitized encapsulation FBG sensor to fabricate smart
cable which was compatible with production process of parallel steel wires cable was designed. The specimen cable
tension test verified sensors high survival rate of the design scheme and good long-term precision after fatigue
experiment. Also the actual application of smart cable was tested by one bridge during the construction and operation
stage.
Being an important bridge engineering structural strengthening manner, external prestressing method usually makes steel
strand which is one of the most widely used member in external cable bear large strain in construction and operating
stage. By means of directly testing structural strain to monitor the mechanical condition and prestressing loss of steel
strand is a great challenge for civil engineers. In order to exert the advantages of FBG sensing technology, study FBGbased
bridge external prestressing test method, achieve the FBG-based prestressing loss monitoring, in this paper, the
difficulties that use FBG to test structural large strain were analyzed and a FBG-based monitoring strategy was elicited.
In order to verify the proposed method, a real bridge strengthening engineering paradigm was given. The monitoring
results showed that the proposed strategy not only met the requirement for structural large strain testing during the whole
construction process, but also the intact FBG sensor still played a role in the subsequent prestressing loss monitoring.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.