Deflection estimation of a full scale prestressed concrete girder using long-gauge fiber optic sensors

2008 ◽  
Vol 22 (3) ◽  
pp. 394-401 ◽  
Author(s):  
Wonseok Chung ◽  
Sungil Kim ◽  
Nam-Sik Kim ◽  
Hee-up Lee
Keyword(s):  
Prestressed Concrete ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Full Scale ◽  
Concrete Girder

Full-scale lateral impact testing of prestressed concrete girder

2016 ◽  
Vol 17 (6) ◽  
pp. 947-958 ◽  
Author(s):  
Yuan Jing ◽  
Zhongguo John Ma ◽  
David B. Clarke
Keyword(s):  
Prestressed Concrete ◽  
Full Scale ◽  
Impact Testing ◽  
Lateral Impact ◽  
Concrete Girder

scholarly journals Fabry–Perot fiber-optic sensors in full-scale fatigue testing on an F-15 aircraft

1992 ◽  
Vol 31 (4) ◽  
pp. 431 ◽  
Author(s):  
Kent A. Murphy ◽  
Michael F. Gunther ◽  
Ashish M. Vengsarkar ◽  
Richard O. Claus
Keyword(s):  
Fiber Optic ◽  
Fatigue Testing ◽  
Fiber Optic Sensors ◽  
Full Scale ◽  
Fabry Perot

scholarly journals Laboratory and In-Situ Testing of Integrated FBG Sensors for SHM for Concrete and Timber Structures

Sensors ◽  
2020 ◽  
Vol 20 (6) ◽  
pp. 1661 ◽  
Author(s):  
Kristýna Čápová ◽  
Lukáš Velebil ◽  
Jan Včelák
Keyword(s):  
Prestressed Concrete ◽  
Fiber Optic ◽  
Analytical Data ◽  
Fiber Optic Sensors ◽  
Transport Infrastructure ◽  
Second Phase ◽  
Loading Tests ◽  
Fbg Sensors ◽  
Prestressed Concrete Bridge

Long-term structural health monitoring (SHM) plays an important role in the safety of public transport infrastructure such as bridges or tunnels and warns in the event of any emerging problem. This article describes development and testing of system based on fiber Bragg grating (FBG) sensors that can detect changes in strain and temperature. The first phase of the research has been focused on the development of new fiber optic sensors for the monitoring of concrete structures and their investigation in laboratory conditions. The work also shows novel applicability of the same FBG technology for glulam structures. Mechanical loading tests of the concrete beam as well as glulam beam with embedded sensors were carried out. Data measured by developed fiber optic sensors were compared with the readings from reference sensors as well as with the analytically calculated values. The achieved results proved good agreement between the measured data, analytical data and reference methods. In second phase of the research, the pilot installation of the sensors was carried out on the newly constructed prestressed-concrete bridge. The bridge was monitored throughout pre-stressing phase and monitoring continued after the completion of the construction works. Problems with the fragility of the sensors occurred during the measurements, but the obtained results provide a good basis for further improvement of the system.

Monitoring of long-term prestress losses in prestressed concrete structures using fiber optic sensors

2018 ◽  
Vol 18 (1) ◽  
pp. 254-269 ◽  
Author(s):  
Hiba Abdel-Jaber ◽  
Branko Glisic
Keyword(s):  
Cross Sections ◽  
Prestressed Concrete ◽  
Fiber Optic ◽  
Concrete Structures ◽  
Fiber Optic Sensors ◽  
Prestress Losses ◽  
Site Assessment ◽  
Princeton University ◽  
Prestressing Force ◽  
Wide Range

This study presents a method for on-site assessment of prestress losses in prestressed concrete structures. The study is motivated by the increased use of prestressed concrete, the importance of prestressing force levels as a parameter, and the lack of formalized methods for its on-site assessment. The proposed method uses strain measurements from long-gauge fiber optic sensors to study strain changes at the centroid of stiffness (i.e. centroid of composite section) of the cross-sections. Its advantages include (1) robustness to operational load on the structure caused by seasonal and daily temperature variations, in addition to loading; (2) rigorous quantification of uncertainties associated with measurements and parameters; and (3) applicability to a wide range of beam-like structures. The application of the method is illustrated through application to measurements collected over a 7-year period from strain sensors embedded in Streicker Bridge, a post-tensioned concrete pedestrian bridge on the Princeton University campus. Application of the method indicates that prestress losses measured by sensors are of comparable magnitude to design estimates, which implies that estimates are not necessarily overly conservative.

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