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Behavior of Strut in Concrete-filled FRP PSC Bridge using FBG Sensors  

Chung, Won-Seok (경희대학교 공과대학 토목공학과)
Kang, Dong-Hoon (한국철도기술연구원)
An, Zu-Og (경희대학교 공과대학 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.9, no.6, 2009 , pp. 11-15 More about this Journal
Abstract
Recently, a new PSC (Prestressed Concrete) bridge system, which is supported by Concrete-filled fiber-reinforced polymer (CFFRP) strut, has been introduced. This bridge is able to reduce self-weight and increase the width of traditional PSC bridges. However, no relevant research has been reported on local behavior of CFFRP strut in the bridge system. The purpose of this study is to investigate local behavior of CFFRP struts using fiber Bragg grating (FBG) sensors. Field tests were performed to examine the hoop strains and longitudinal strains of the FRP strut under various lateral positions and velocities of a test truck. It has been observed that CFFRP strut is under compression regardless of vehicle speed and location. However, the CFFRP strut is sensitive to the lateral position of vehicles in terms of strain magnitude. Results also indicated that the FBG sensors can faithfully record the hoop and longitudinal strains of the FRP strut without electro-magnetic interference.
Keywords
Bridge; FBG Sensor; Concrete-Filled FRP Strut; PSC Box Girder;
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Times Cited By KSCI : 2  (Citation Analysis)
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