A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Nondestructive testing of bridges strengthened by external prestressing using distributed fiber optic sensing
As newly-developed techniques, distributed fiber optic sensing (DFOS) hold a great deal of potential for bridge nondestructive testing due to their prominently high durability, large data transmission bandwidth and inherent immunity to electric and electromagnetic interference. This study focuses on the applicability of two major types of DFOS, namely FBG and BOTDR, in the nondestructive testing for concrete bridges strengthened by external prestressing. By means of a fatigue test for a RC T beam strengthened by externally prestressed AFRP composites cables, measuring results obtained from serially connected FBG sensors and distributed BOTDR sensing optical fibers are compared with those from foil strain gages and the plan section assumption deduction. It is found that FBG sensing has adequate precisions, high durability and inherent immunity from signal noises to well perform the statically or dynamically nondestructive testing for the concrete structure. And BOTDR sensing also shows much applicability to the statically nondestructive testing for the strain distribution and prestressing loss along the composites cables.
Nondestructive testing of bridges strengthened by external prestressing using distributed fiber optic sensing
As newly-developed techniques, distributed fiber optic sensing (DFOS) hold a great deal of potential for bridge nondestructive testing due to their prominently high durability, large data transmission bandwidth and inherent immunity to electric and electromagnetic interference. This study focuses on the applicability of two major types of DFOS, namely FBG and BOTDR, in the nondestructive testing for concrete bridges strengthened by external prestressing. By means of a fatigue test for a RC T beam strengthened by externally prestressed AFRP composites cables, measuring results obtained from serially connected FBG sensors and distributed BOTDR sensing optical fibers are compared with those from foil strain gages and the plan section assumption deduction. It is found that FBG sensing has adequate precisions, high durability and inherent immunity from signal noises to well perform the statically or dynamically nondestructive testing for the concrete structure. And BOTDR sensing also shows much applicability to the statically nondestructive testing for the strain distribution and prestressing loss along the composites cables.
Nondestructive testing of bridges strengthened by external prestressing using distributed fiber optic sensing
Zerstörungsfreie Prüfung von mit externer Vorspannung verfestigten Brücken mittels verteilten faseroptischen Sensoren
2004
8 Seiten, 9 Bilder, 1 Tabelle, 8 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
| British Library Conference Proceedings | 2004
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