A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Concrete inspection with GPR. Advances in analysis
Ground penetrating radar (GPR) is now a well established method for non-destructive examination of concrete structures. In some jurisdictions in the USA and Canada, GPR has replaced the use of X-ray imaging for most routine inspections. Although powerful for locating and imaging major structures, quantitative assessment of GPR information is still evolving. Use of signal intensity, polarity and frequency dispersion can provide additional information about concrete character and material composition as well as reinforcing and post tension cable depth and integrity. The experiments to date have allowed to assess a number of factors that will lead to more quantitative use of GPR data for assessing concrete structures. The most important outcomes are as follows: (a) careful construction of full size test pads has provided invaluable insight; (b) numerical simulation of responses is key to quantitative analysis; (c) use of simpler approximate physics based solutions provides critical insight into complex numerical models and measured results; (d) direct use of GPR amplitude information is still problematic but progress is occurring; and (e) use of pulse polarity is possible but in complex situations there is considerable ambiguity. The authers view is that they are taking small steps along a path to better understanding. As more use of GPR technology occurs, their knowledge base will expand, and their ability to be more quantitative will grow. The exciting fact is that GPR is rapidly becoming a routine method for non-destructive concrete inspection.
Concrete inspection with GPR. Advances in analysis
Ground penetrating radar (GPR) is now a well established method for non-destructive examination of concrete structures. In some jurisdictions in the USA and Canada, GPR has replaced the use of X-ray imaging for most routine inspections. Although powerful for locating and imaging major structures, quantitative assessment of GPR information is still evolving. Use of signal intensity, polarity and frequency dispersion can provide additional information about concrete character and material composition as well as reinforcing and post tension cable depth and integrity. The experiments to date have allowed to assess a number of factors that will lead to more quantitative use of GPR data for assessing concrete structures. The most important outcomes are as follows: (a) careful construction of full size test pads has provided invaluable insight; (b) numerical simulation of responses is key to quantitative analysis; (c) use of simpler approximate physics based solutions provides critical insight into complex numerical models and measured results; (d) direct use of GPR amplitude information is still problematic but progress is occurring; and (e) use of pulse polarity is possible but in complex situations there is considerable ambiguity. The authers view is that they are taking small steps along a path to better understanding. As more use of GPR technology occurs, their knowledge base will expand, and their ability to be more quantitative will grow. The exciting fact is that GPR is rapidly becoming a routine method for non-destructive concrete inspection.
Concrete inspection with GPR. Advances in analysis
Betonprüfung mit Bodenradar. Fortschritte in der Analyse
Annan, A.P. (author) / Redman, J.D. (author) / Souza, T. de (author)
2006
11 Seiten, 15 Bilder, 2 Tabellen, 7 Quellen
Conference paper
Storage medium
English
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