טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentRony Dvir
SubjectIdentification of Cracks in Reinforced Concrete Beams
and Plates with Distributed Fiber Optics
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Dr. Yiska Goldfeld
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

A procedure for the identification of the stiffness distribution and for the damage quantification in RC plate-like structures is presented. Since damage typically consists of local phenomena, its effect on the measured static displacement of the structure may be limited. The curvature distribution, on the other hand, is more sensitive to local damage. Yet, accurate estimation of the curvature shape from experimental data is difficult and usually involves a post-processing procedure. Brillouin Optical Time Domain Reflectometry (BOTDR) is a promising candidate for static damage evaluation in large structures as it allows continuous distribution of strain along the structure. In previous works, Goldfeld and Klar (2011,2013), it was found that even though the inherent limitation of spatial resolution of approximately 1m, a quantified parameter for very localized damage as cracks and an equivalent bending stiffness distribution can be found in RC beam. To use this concept in plate-like structures, estimation of the curvature distributions along x and y directions with respect to the capability of the BOTDR technology should be considered, as well as, consideration to the influence of the redistribution of the internal forces and moments on the curvature distributions. Therefore, the aim of this study is to investigate these issues in details and to suggest a tailored identification procedure for plate-like structures based on the BOTDR technology.