Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment
To analyze the crack development characteristics of corroded reinforced concrete (RC) beams in high-temperature saline environment flexural failure, and to explore the degradation laws of beams' flexural performance after high-temperature corrosion, as well as the time-frequency characteristics...
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525000361 |
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| author | Dazhong Zhang Shiyi Zhang SM Chayan Yingfang Fan Surendra P. Shah Junjie Zheng |
| author_facet | Dazhong Zhang Shiyi Zhang SM Chayan Yingfang Fan Surendra P. Shah Junjie Zheng |
| author_sort | Dazhong Zhang |
| collection | DOAJ |
| description | To analyze the crack development characteristics of corroded reinforced concrete (RC) beams in high-temperature saline environment flexural failure, and to explore the degradation laws of beams' flexural performance after high-temperature corrosion, as well as the time-frequency characteristics of the acoustic emission signals during flexural failure; employing electrochemical acceleration corrosion and four-point bending tests, combined with acoustic emission technology, establishes a connection between the flexural failure process of concrete beams under three conditions: unrusted (RC-1), rusted at room temperature (CRC-1), and rusted at high temperature (GRC-1). Additionally, the study uses the Abaqus finite element numerical analysis method to simulate and verify the flexural failure process of the concrete beams under three conditions. The experimental results indicate that high-temperature conditions exacerbate the corrosion of the beam body compared to room-temperature conditions. Specifically, the corrosion rate of steel reinforcement increases by 2.25 %, and rust expansion cracks appear earlier under high-temperature conditions. The yield load of the beam is advanced under high-temperature conditions and corrosion, and the ultimate bending capacity of the beam decreases, the ultimate bending capacity of the beam CRC-1 and GRC-1 under corrosion conditions decreases by 6.7 % and 14.4 %, respectively, compared with that of the beam RC-1 under non-corrosion condition. Under high temperature and corrosion conditions, the level of bending failure cracks is basically concentrated below 1/2 of the beam height, and the development level of the cracks is greatly limited. As the degree of rusting increases, the proportions of AE signal RA in the beams of RC-1, CRC-1, and G-1 are 77.6 %, 81.96 %, and 90.8 %, respectively, showing an increasing trend, and the proportion of shear cracks in the beams increases. The common characteristics of the amplitude distribution at each stage of bending damage of reinforced concrete beams are mainly reflected in the amplitude peaks in the frequency bands 4–6 kHz, 13.5–16 kHz, and 53–57 kHz. When the beam reaches the yield stage the amplitude peaks in the high-frequency band rise abruptly, indicating that the internal reinforcement of the beam has yielded and the structure is about to become unstable as it enters failure stage. This can be used as an important basis for monitoring the extent of internal damage to the structure using time-frequency transformation of acoustic emission signals. As the level of rust expansion cracks inside the beams continues to intensify and the initial damage of the structure increases, the fitted slope of the seismic mechanics ba values RC-1 (-1.91e-5) > CRC-1 (-2.51e-5) > GRC-1 (-2.99e-5), the level of negative values of the fitted slopes increases, and the damage process of the beam structure accelerates, and the structural ductility and flexural bearing capacity decrease. |
| format | Article |
| id | doaj-art-df7a09f70f7c4fa18199515845cd33aa |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
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| series | Case Studies in Construction Materials |
| spelling | doaj-art-df7a09f70f7c4fa18199515845cd33aa2025-01-19T06:25:01ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04237Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environmentDazhong Zhang0Shiyi Zhang1SM Chayan2Yingfang Fan3Surendra P. Shah4Junjie Zheng5School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, Shandong 255000, ChinaSchool of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, Shandong 255000, China; Institute of Road and Bridge Engineering, Dalian Maritime University, Dalian, Liaoning 116026, China; Corresponding author at: School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, Shandong 255000, China.School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, Shandong 255000, ChinaInstitute of Road and Bridge Engineering, Dalian Maritime University, Dalian, Liaoning 116026, ChinaDepartment of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA; Department of Civil Engineering, University of Texas at Arlington, Arlington, TX 76010, USASchool of Civil Engineering Wuhan University, Wuhan, Hubei 430000, ChinaTo analyze the crack development characteristics of corroded reinforced concrete (RC) beams in high-temperature saline environment flexural failure, and to explore the degradation laws of beams' flexural performance after high-temperature corrosion, as well as the time-frequency characteristics of the acoustic emission signals during flexural failure; employing electrochemical acceleration corrosion and four-point bending tests, combined with acoustic emission technology, establishes a connection between the flexural failure process of concrete beams under three conditions: unrusted (RC-1), rusted at room temperature (CRC-1), and rusted at high temperature (GRC-1). Additionally, the study uses the Abaqus finite element numerical analysis method to simulate and verify the flexural failure process of the concrete beams under three conditions. The experimental results indicate that high-temperature conditions exacerbate the corrosion of the beam body compared to room-temperature conditions. Specifically, the corrosion rate of steel reinforcement increases by 2.25 %, and rust expansion cracks appear earlier under high-temperature conditions. The yield load of the beam is advanced under high-temperature conditions and corrosion, and the ultimate bending capacity of the beam decreases, the ultimate bending capacity of the beam CRC-1 and GRC-1 under corrosion conditions decreases by 6.7 % and 14.4 %, respectively, compared with that of the beam RC-1 under non-corrosion condition. Under high temperature and corrosion conditions, the level of bending failure cracks is basically concentrated below 1/2 of the beam height, and the development level of the cracks is greatly limited. As the degree of rusting increases, the proportions of AE signal RA in the beams of RC-1, CRC-1, and G-1 are 77.6 %, 81.96 %, and 90.8 %, respectively, showing an increasing trend, and the proportion of shear cracks in the beams increases. The common characteristics of the amplitude distribution at each stage of bending damage of reinforced concrete beams are mainly reflected in the amplitude peaks in the frequency bands 4–6 kHz, 13.5–16 kHz, and 53–57 kHz. When the beam reaches the yield stage the amplitude peaks in the high-frequency band rise abruptly, indicating that the internal reinforcement of the beam has yielded and the structure is about to become unstable as it enters failure stage. This can be used as an important basis for monitoring the extent of internal damage to the structure using time-frequency transformation of acoustic emission signals. As the level of rust expansion cracks inside the beams continues to intensify and the initial damage of the structure increases, the fitted slope of the seismic mechanics ba values RC-1 (-1.91e-5) > CRC-1 (-2.51e-5) > GRC-1 (-2.99e-5), the level of negative values of the fitted slopes increases, and the damage process of the beam structure accelerates, and the structural ductility and flexural bearing capacity decrease.http://www.sciencedirect.com/science/article/pii/S2214509525000361Electrically accelerated corrosionReinforced concrete beamsBending damageAcoustic emission |
| spellingShingle | Dazhong Zhang Shiyi Zhang SM Chayan Yingfang Fan Surendra P. Shah Junjie Zheng Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment Case Studies in Construction Materials Electrically accelerated corrosion Reinforced concrete beams Bending damage Acoustic emission |
| title | Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment |
| title_full | Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment |
| title_fullStr | Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment |
| title_full_unstemmed | Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment |
| title_short | Time-frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high- temperature saline environment |
| title_sort | time frequency characterization of acoustic emission signals from bending damage of corroded reinforced concrete beams in high temperature saline environment |
| topic | Electrically accelerated corrosion Reinforced concrete beams Bending damage Acoustic emission |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525000361 |
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