Presentation
SAFT Analysis and Phase Evaluation Procedures Using Ultrasonic Shear Wave Imaging Device (MIRA) Data
Transportation Research Board 97th Annual Meeting
(2018)
Abstract
Identifying defects in post-tensioning ducts and reliably locating them are challenging. Several technologies are used with varying success. Ultrasonic shear wave tomography is the latest technology that is being evaluated for detecting post-tensioning tendon duct conditions, locating and quantifying other anomalies in concrete structures, locating reinforcement, etc. Currently, there are two systems available in the market. The typical approach is to use the A and B scans as well as the panoramic images of the B scans that are readily available through the graphical user interface of the equipment for interpretation of the data. The intensity of the reflected waves is primarily used for data interpretation. Even though the use of reflected wave intensity is adequate for certain applications, this has limited the data analysis and results interpretation capabilities. A set of software modules, named as the InterSAFT (Interactive Synthetic Aperture Focusing Technique), is available for 3D reconstruction of data, visualization of wave strength as Iso-surfaces, phase evaluation, etc. This article presents the application process of the software for ultrasonic shear wave tomography data analysis. The process is demonstrated using data collected from a laboratory specimen with MIRA A1040, a commercially available system. The application of the software for evaluating the condition of post-tensioning ducts of several laboratory specimens and a roof slab of a subway tunnel is discussed.
Disciplines
Publication Date
January 1, 2018
Location
Washington D.C., United States
Citation Information
Upul Attanayake, Amila Dissanayake, Klaus Mayer and Herbert Wiggenhauser. "SAFT Analysis and Phase Evaluation Procedures Using Ultrasonic Shear Wave Imaging Device (MIRA) Data" Transportation Research Board 97th Annual Meeting (2018) Available at: http://works.bepress.com/upul-attanayake/5/