Classification of Damage Mode of Reinforced Concrete Beams Using Acoustic Emission Technique

2012 ◽  
Vol 626 ◽  
pp. 953-957 ◽  
Author(s):  
Md Noor Noorsuhada ◽  
Ibrahim Azmi ◽  
Norazura Muhamad Bunnori ◽  
Mat Saliah Soffian Noor ◽  
Mohd Saman Hamidah ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Shear Crack ◽  
Reinforced Concrete Beams ◽  
Damage Mode ◽  
Rc Beams ◽  
Static Test ◽  
The Relationship

Classification of damage modes in reinforced concrete (RC) beams was studied. Acoustic emission (AE) monitoring in conjunction with static test was applied on RC beams. The damage modes were classified by based on the load-deflection curve, the relationship between load and damage modes and the intensity analysis. It can be concluded that six damage modes were identified; namely micro-cracking, localized crack propagation, flexural crack distribution, shear crack formation, damage localization and failure of the beam. The use of intensity chart clearly estimates the zones of the damage mode of the reinforced concrete beams.

ACOUSTIC EMISSION BEHAVIOUR OF OVER-REINFORCED CONCRETE BEAMS

2019 ◽  
pp. 4-12 ◽  
Author(s):  
V. V. Bardakov ◽  
A. I. Sagaydak ◽  
S. V. Elizarov
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Cyclic Load ◽  
Concrete Beams ◽  
Experimental Studies ◽  
Reinforced Concrete Beams ◽  
Emission Data ◽  
Point Bend ◽  
Destructive Processes ◽  
The Relationship

The paper presents the results of the conducted experimental studies on three-point bend testing of over-reinforced concrete beams with incremental cyclic load, up to destruction, using the acoustic emission method. In total 3 RC beams differ from each other in reinforcement type, concrete composition and ultimate load were tested. Special attention is paid to the investigation of the relationship between destructive processes occurring during the testing of reinforced concrete beams and the evolution of acoustic emission data registered during the test. The analysis described in the article makes it possible, on the basis of acoustic emission data, recorded during the tests, to distinguish the stages corresponding to the different technical state of over-reinforced concrete structures.

Active Fatigue Crack Detection and Classification of Reinforced Concrete Beams Using Acoustic Emission

InCIEC 2013 ◽  
2014 ◽  
pp. 625-636
Author(s):  
Noorsuhada Md Nor ◽  
Azmi Ibrahim ◽  
Norazura Muhamad Bunnori ◽  
Hamidah Mohd Saman ◽  
Soffian Noor Mat Saliah ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fatigue Crack ◽  
Reinforced Concrete ◽  
Crack Detection ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fatigue Crack Detection

scholarly journals Analysis of the microcracking process with the Acoustic Emission method with respect to the service life of reinforced concrete structures with the example of the RC beams

2015 ◽  
Vol 63 (1) ◽  
pp. 55-63 ◽  
Author(s):  
B. Goszczyńska ◽  
G. Świt ◽  
W. Trąmpczyński
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Structural Damage ◽  
Crack Width ◽  
Crack Formation ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Acoustic Emission Method ◽  
Emission Method

Abstract The study presents the analysis of the process of crack formation and crack width growth in statically determinate and hyperstatic reinforced concrete beams with the IADP acoustic emission method. The beams were subjected to the monotonic, variable with unloading, and variable cyclic loading schemes. The criteria of structural damage were established to account for the structure durability

ACOUSTIC EMISSION SiGMA ANALYSIS ON SHEAR COMPRESSION FAILURE IN REINFORCED CONCRETE BEAMS

2008 ◽  
Vol 64 (1) ◽  
pp. 72-81
Author(s):  
Kentaro OHNO ◽  
Shinichiro SHIMOZONO ◽  
Yosuke SAWADA ◽  
Masayasu OHTSU
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Compression Failure

Application of acoustic emission monitoring for assessment of bond performance of corroded reinforced concrete beams

2016 ◽  
Vol 16 (6) ◽  
pp. 732-744 ◽  
Author(s):  
Ahmed A Abouhussien ◽  
Assem AA Hassan
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Signal Strength ◽  
Point Load ◽  
Reinforced Concrete Beams ◽  
Bond Failure ◽  
Acoustic Emission Monitoring ◽  
Bond Performance ◽  
Emission Monitoring

This article presents the results of an experimental investigation on the application of acoustic emission monitoring for the evaluation of bond behaviour of deteriorated reinforced concrete beams. Five reinforced concrete beam–anchorage specimens designed to undergo bond failure were exposed to corrosion at one of the anchorage zones by accelerated corrosion. Two additional beams without exposure to corrosion were included as reference specimens. The corroded beams were subjected to four variable periods of corrosion, leading to four levels of steel mass loss (5%, 10%, 20% and 30%). After these corrosion periods, all seven beams were tested to assess their bond performance using a four-point load setup. The beams were continuously monitored by attached acoustic emission sensors throughout the four-point load test until bond failure. The analysis of acquired acoustic emission signals from bond testing was performed to detect early stages of bond damage. Further analysis was executed on signal strength of acoustic emission signals, which used cumulative signal strength, historic index ( H( t)) and severity ( Sr) to characterize the bond degradation in all beams. This analysis allowed early identification of three stages of damage, namely, first crack, initial slip and anchorage cracking, before their visual observation, irrespective of corrosion level or sensor location. Higher corrosion levels yielded significant reduction in both bond strength and corresponding acoustic emission parameters. The results of acoustic emission parameters ( H( t) and Sr) enabled the development of a damage classification chart to identify different stages of bond deterioration.

Reliability-Based Balanced Condition for Strengthened RC Beams

2013 ◽  
Vol 756-759 ◽  
pp. 25-28 ◽  
Author(s):  
Chun Xia Li ◽  
Zhi Sheng Ding ◽  
Shi Lin Yan ◽  
Jun Ming Chen
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Stress Distribution ◽  
Tensile Strain ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Experimental Result ◽  
Rc Beams ◽  
Yield Strain ◽  
Reliability Indicator

Based on the experimental result of the flexure capability of reinforced concrete beams strengthened by carbon fiber sheets, the stress distribution changes only after steel yielding and carbon fiber sheets function better. However serious the extent of the damage is before strengthened, the tensile strain of main steel reaches about 1.6 times of the yield strain for the secondary grade of steel as failure happens. To satisfy the object reliability indicator, reliability is analyzed using the ratio of the steel strain at the balanced failure to the yield strain as variable to obtain its optimum value, which is coincide with the experimental result, and makes better consistency between calculated reliability indicator and object reliability indicator.

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