Nondestructive evaluation of horizontal cracks in RC slabs by impact elastic-wave methods

2010 ◽  
pp. 141-150
Keyword(s):  
Elastic Wave ◽  
Nondestructive Evaluation ◽  
Rc Slabs ◽  
Wave Methods

scholarly journals NON-DESTRUCTIVE EVALUATION FOR HORIZONTAL CRACKS IN EXISTING RC SLABS BY ANALYSIS-AIDED IMPACT ELASTIC-WAVE METHODS

2012 ◽  
Vol 06 ◽  
pp. 670-675
Author(s):  
Heung-Soo Lee ◽  
Toshiro Kamada ◽  
Shinya Uchida ◽  
Toshiki Iwasaki
Keyword(s):  
Elastic Wave ◽  
Highway Bridges ◽  
Bottom Surface ◽  
Response Analysis ◽  
Wave Method ◽  
Rc Slab ◽  
Ball Diameter ◽  
Rc Slabs ◽  
Wave Methods ◽  
Non Destructive

In this study, impact elastic-wave method was performed at the bottom surface of RC slab cut from an existing highway bridges to survey the horizontal cracks. Before measurements by impact elastic-wave method, impact response analysis was applied to determine optimal steel ball diameter, distance between impact point and receiving point of elastic-wave. Efficiency of analysis-aided impact elastic-wave method was confirmed by drilling and observing the interior of the RC slab by stick scanner. Evaluation results by this method agreed well with results of visual inspection. Thus, validity of the analysis-aided impact elastic-wave method on detection of horizontal cracks in RC slabs of highway bridges was demonstrated.

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