A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Optimization of electromagnetic acoustic transducers for nondestructive evaluation of concrete structures
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. ; Title from title screen of research.pdf file (viewed on September 12, 2008) ; Thesis (M.S.) University of Missouri-Columbia 2008. ; There are more than 130,000 prestressed concrete bridges in the United States with about 37,000 bridges being more than 30 years old. Prestressing steel strands are an important construction element used in these bridges and are critical to their performance. Presently there is no effective inspection/Nondestructive Evaluation (NDE) technology for condition assessment of these prestressing strands once they are embedded in concrete. The overall goal of the research is to develop a sensor technology to detect deterioration in embedded steel strands in concrete structures. The sensor technology to be developed is an Electromagnetic Acoustic transducer (EMAT) based on the Magnetostriction effect or Joule effect. The objective of this part of the research is to maximize the efficiency of an EMAT by optimizing its design parameters in order to overcome the limitation of significant wave attenuation and low level signals that is characteristic of these sensors when embedded in concrete. Ultrasonic measurements were made in order to maximize the efficiency of EMAT by considering the influence of modifying three parameters; bias magnetic field, number of coil turns and the number of coils. ; Includes bibliographical references
Optimization of electromagnetic acoustic transducers for nondestructive evaluation of concrete structures
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. ; Title from title screen of research.pdf file (viewed on September 12, 2008) ; Thesis (M.S.) University of Missouri-Columbia 2008. ; There are more than 130,000 prestressed concrete bridges in the United States with about 37,000 bridges being more than 30 years old. Prestressing steel strands are an important construction element used in these bridges and are critical to their performance. Presently there is no effective inspection/Nondestructive Evaluation (NDE) technology for condition assessment of these prestressing strands once they are embedded in concrete. The overall goal of the research is to develop a sensor technology to detect deterioration in embedded steel strands in concrete structures. The sensor technology to be developed is an Electromagnetic Acoustic transducer (EMAT) based on the Magnetostriction effect or Joule effect. The objective of this part of the research is to maximize the efficiency of an EMAT by optimizing its design parameters in order to overcome the limitation of significant wave attenuation and low level signals that is characteristic of these sensors when embedded in concrete. Ultrasonic measurements were made in order to maximize the efficiency of EMAT by considering the influence of modifying three parameters; bias magnetic field, number of coil turns and the number of coils. ; Includes bibliographical references
Optimization of electromagnetic acoustic transducers for nondestructive evaluation of concrete structures
2008-01-01
248626449
Theses
Electronic Resource
English
DDC:
690
Actively modulated acoustic nondestructive evaluation of concrete
| Elsevier | 2003
Analysis of Acoustic Surface Waveguides for Nondestructive Evaluation of Concrete Structures
| British Library Conference Proceedings | 1995
Actively modulated acoustic nondestructive evaluation of concrete
| Online Contents | 2004
Actively modulated acoustic nondestructive evaluation of concrete
| Tema Archive | 2004
Actively modulated acoustic nondestructive evaluation of concrete
| British Library Online Contents | 2004