Method and monitoring approach for distributed detection of damage in multi-span continuous bridges. (15th June 2019)

• Record Type: Journal Article
• Authors: Oskoui, Elias Abdoli; Taylor, Todd; Ansari, Farhad
• Is Part Of: Engineering structures. Volume 189(2019)
• Page Start: 385
• Page End: 395
• Publication Date: 2019-06-15
• Subjects: Health monitoring -- BOTDA -- Distributed sensing -- Crack detection -- Strain profiles -- Bridges; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2019.02.037
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Employed a Brillouin Scattering based optical fiber sensor for structural health monitoring of a Bridge. Developed a method for distributed detection of damage along the lengths of multi-span continuous Bridges. Developed a damage index for detection of microcracks along the length of the Bridge. Abstract: A method for distributed detection of damage along the lengths of multi-span continuous Bridges is introduced. It is based on monitoring the distributed strains along the length of the bridge by using Brillouin scattering based optical fiber sensors. Identification of damage beyond the signal to noise limits of the instrument is achieved by normalization of the measured distributed strains during multiple positions of a truck with respect to the theoretical influence line of the bridge. Formulation of the method leads to the introduction of a damage index for identification of microcrack locations along the spans of the Bridge. Effectiveness of the proposed method was evaluated by load testing of a five span continuous precast post-tensioned concrete box girder bridge. Locations of detected microcracks by the distributed sensor system were further verified by visual inspections.