scholarly journals Fracture Formation Evaluation of Reinforced Concrete Structure Using Acoustic Emission Technique

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Alireza Panjsetooni ◽  
Norazura Muhamad Bunnori ◽  
Amir Hossein Vakili ◽  
Zohreh Shirkhani ◽  
Zeinab Shirkhani
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Concrete Structure ◽  
Structural Engineering ◽  
Load Ratio ◽  
Ratio Method ◽  
Reinforced Concrete Structure ◽  
Remaining Service Life ◽  
Fracture Formation ◽  
Viable Method

Acoustic emission (AE) is an important nondestructive evaluation (NDE) technique used in the field of structural engineering for both case local and global monitoring. In this study AE technique with a new approach was employed to investigate the process of fracture formation in reinforced concrete structure. A number of reinforced concrete (RC) one story frames were tested under loading cycle and were simultaneously monitored using AE. The AE test data was analyzed using the relaxation ratio and calm and load ratio method. Also, the relaxation ratio was dominated with approaching load to 58% of the ultimate load. In addition three levels of damage using calm and load ratio were distinguished. The trend of relaxation ratio and calm and load ratio method during loading and unloading showed that these methods are strongly sensitive with cracks growth in RC frame specimens and were able to indicate the levels of damage. Also, results showed that AE can be considered as a viable method to predict the remaining service life of reinforced concrete. In addition, with respect to the results obtained from relaxation ratio and, load and calm ratio indicated, a new chart is proposed.

Acoustic emission monitoring of a reinforced concrete structure by applying new fiber-optic sensors

2005 ◽  
Vol 14 (3) ◽  
pp. S52-S59 ◽  
Author(s):  
Kazuro Kageyama ◽  
Hideaki Murayama ◽  
Isamu Ohsawa ◽  
Makoto Kanai ◽  
Keiichi Nagata ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Concrete Structure ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Reinforced Concrete Structure ◽  
Acoustic Emission Monitoring ◽  
Emission Monitoring

Risk Assessment of Reinforced Concrete Structure Attacked by Chloride

2011 ◽  
Vol 217-218 ◽  
pp. 734-739 ◽  
Author(s):  
Chongsin Sookoomjariyapong ◽  
Sanguan Vongchavalitkul ◽  
Sun Sayamipuk
Keyword(s):  
Risk Assessment ◽  
Reinforced Concrete ◽  
Concrete Structure ◽  
Structural Engineering ◽  
Risk Index ◽  
Structural Condition ◽  
Actual Condition ◽  
Reinforced Concrete Structure ◽  
Extreme Risk ◽  
Chloride Attack

The deterioration of reinforced concrete (RC) structure due to chloride attack plays an important role in the reduction of structure strength. Consequently, the actual condition of structure is an essential investigation for management planning in concrete structure which is attacked by chloride. In this paper, the proposed assessment bases on the risk management and the reliability theory presents in risk index (RI) of structure. The reinforced concrete building under the marine environment was an illustrative example for risk evaluation. It was found that the risk index of structure equaled to 20, it implied that the structural condition encountered with extreme risk due to chloride attack and must be rehabilitated urgently. As analysis results, the risk assessment is relation to the actual condition of structure. This assessment can be used as a guideline tool for structural engineering to assess the concrete structure attacked by chloride.

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