Post-Tensioned concrete bridges have been used for both rail and road bridges for some 40 years. Problems were first noticed with road bridges due to the use of de-icing salts. However there have been collapses of post-tensioned concrete railway bridges. Following this series of collapses, the Highways Agency enforced a ban on the construction of post-tensioned bridges with metallic tendon ducts. The moratorium was lifted with the introduction of plastic tendon ducts.
This paper will focus on the analysis of impact-echo NDT of concrete beams with plastic tendon ducts - using both a conventional frequency domain analysis and also using the Japanese SIBIE (Stack Imaging of Spectral Amplitudes Based on Impact-Echo) method. It will be shown that the SIBIE method of analysis exhibits great promise in testing these previously difficult to inspect plastic tendon ducts, using impact-echo.
|Title of host publication||Innovations in Bridge Engineering Technology|
|Place of Publication||LONDON|
|Publisher||Taylor & Francis|
|Number of pages||13|
|Publication status||Published - 2007|
|Event||Innovations in Bridge Engineering Technology - 4th New York City Bridge Conference 2007 - New York, NY, United Kingdom|
Duration: 27 Aug 2007 → 28 Aug 2007
|Conference||Innovations in Bridge Engineering Technology - 4th New York City Bridge Conference 2007|
|City||New York, NY|
|Period||27/08/07 → 28/08/07|