Volume 24, Issue 11 (November 2024)
Modares Mechanical Engineering 2024, 24(11): 17-22 |
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The Effect of Debonding Damage of Steel Tube from Concrete Core on the Dynamic Parameters of CFT Column. Modares Mechanical Engineering 2024; 24 (11) :17-22
URL: http://mme.modares.ac.ir/article-15-79199-en.html
URL: http://mme.modares.ac.ir/article-15-79199-en.html
Abstract: (513 Views)
Health monitoring allows small failures and damages to be identified and fixed before they turn into major and irreparable damages, to prevent loss of life and to make it possible to reinforce or improve it at the lowest cost. Currently, in the field of civil engineering, the health monitoring of structures is done in sensitive structures. One of the parts of the structure that may suffer initial damage before loading and during implementation due to difficulty in implementation is Concrete Filled Tube (CFT)columns. One of the most likely damages in CFT columns is interface debonding damage. This damage causes the column to become weak and not benefit from the characteristics of steel and concrete together. Accordingly, in the present study, this damage and its severity in seismic (dynamic) parameters have been investigated. The results of the study show that damage causes changes in the mode shape of the structure, and it has caused a 6.38% reduction in the frequency in the first (main) mode of the structure. Also, the damping of the damaged specimen is reduced by approximately 12% compared to the healthy specimen. On the other hand, the results show that the severity of damage is very effective in changing seismic parameters. So that by doubling the damage area, the frequency decreased by approximately 0.35% and reached from 873.27 Hz to 20.870.20 Hz, but the mode shape of damage did not affect the frequency
Keywords: Structural Health Monitoring, CFT Column, Debonding Damage, Mode Shape, Frequency, Wavelet Transform.
Article Type: Original Research |
Subject:
Micro & Nano Systems
Received: 2025/01/27 | Accepted: 2024/10/22 | Published: 2024/10/22
Received: 2025/01/27 | Accepted: 2024/10/22 | Published: 2024/10/22
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