Crack sizing accuracy of a phased array ultrasonic scanner developed for inspection of rib-to-deck welded joints in orthotropic steel bridge decks

2021 ◽  
pp. 825-826
Author(s):  
M. Hattori ◽  
T. Makita ◽  
K. Tateishi ◽  
T. Hanji ◽  
M. Shimizu ◽  
...  
Keyword(s):  
Welded Joints ◽  
Phased Array ◽  
Bridge Decks ◽  
Steel Bridge ◽  
Crack Sizing ◽  
Ultrasonic Scanner

Investigation and Diagnosis of Fatigue Cracks of Rib-to-Deck Welded Joints in Orthotropic Decks by the Phased Array Ultrasonic Scanner

2019 ◽  
Author(s):  
Masafumi Hattori ◽  
Koji Osada ◽  
Shoji Nojima ◽  
Hideyuki Tatematsu
Keyword(s):  
Welded Joints ◽  
Phased Array ◽  
Early Stage ◽  
Fatigue Cracks ◽  
Transportation Safety ◽  
Investigation Area ◽  
Diagnosis Method ◽  
Ultrasonic Scanner ◽  
Pavement Damage ◽  
The Cost

<p>Over the last decade, fatigue cracks have been observed at the rib-to-deck welded joints in many orthotropic decks in Japan. Considering the fatigue cracks can cause pavement damage and thus compromise transportation safety, it is necessary to detect and repair it at the early stage of its development. But the cracks occur from the weld route, it cannot be detected in early stage by visual check. Therefore, the phased array ultrasonic scanner (PAUS) has been developed as the method which can detect and measure the cracks with small size. And, it can simultaneously investigates the deck propagation type cracks and the weld bead propagation type cracks.</p><p>In this study, we propose a diagnosis method which considered the relation with selected countermeasures based on technological knowledge. And we propose an investigation area selecting method based on investigation speed of the PAUS which is confirmed by trial on the real bridge. In addition, the cost advantage by using the PAUS is estimated.</p>

scholarly journals EFFECT OF TIRE LOAD MODEL ON LONGITUDINAL SURFACE CRACK OF PAVEMENTS ON STEEL BRIDGE DECKS

2005 ◽  
Vol 10 ◽  
pp. 23-30 ◽  
Author(s):  
Takashi KOBAYASHI ◽  
Tatsuo NISHIZAWA ◽  
Yasuo KAJIKAWA
Keyword(s):  
Surface Crack ◽  
Bridge Decks ◽  
Steel Bridge ◽  
Load Model
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