Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency
In order to obtain the fatigue stiffness degradation law of in-service concrete T-beam and carry out fatigue life prediction, a dual-stage stiffness degradation model considering cracks was established for T-beams and formulas for calculating the fundamental frequency of damaged concrete T-beams wer...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-10-01
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| Series: | Journal of Asian Architecture and Building Engineering |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/13467581.2023.2264914 |
| _version_ | 1827766745296797696 |
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| author | Xin-Dai Zuo Ying-Sheng Ni Jin-Quan Zhang Shang-Chuan Zhao |
| author_facet | Xin-Dai Zuo Ying-Sheng Ni Jin-Quan Zhang Shang-Chuan Zhao |
| author_sort | Xin-Dai Zuo |
| collection | DOAJ |
| description | In order to obtain the fatigue stiffness degradation law of in-service concrete T-beam and carry out fatigue life prediction, a dual-stage stiffness degradation model considering cracks was established for T-beams and formulas for calculating the fundamental frequency of damaged concrete T-beams were deduced based on relevant theories of damage mechanics. The developed model aimed to investigate the influences of the fatigue stiffness degradation of in-service concrete T-beams on the natural vibration frequency of structures. A fatigue test was conducted for full-scale test beams to examine the crack development and fundamental frequency change law of structures during the fatigue process. Based on a full scale model of 10 m reinforced concrete T-beams, static and fatigue failure tests were carried out to obtain the evolution law of fatigue residual stiffness with load times. Fatigue damage coefficient D and stiffness degradation coefficient k were introduced to establish the fatigue life prediction model of T-beams in service. In line with the related test data and fundamental frequency formulas, stiffness updating methods were put forward for the concrete T-beam finite element models. By comparing the calculated value and test value of the natural vibration frequency of structures, the relative error was estimated to be within 6%. This verified the accuracy and reliability of the fundamental frequency calculation formulas and the updated finite element models. The research results can be used as a reference for the precise simulation of the fatigue damage finite element models of concrete T-beams. Finally, a method for life prediction of in-service reinforced concrete beam Bridges is proposed, and relevant research results can provide theoretical support for the study of life prediction of such Bridges. |
| first_indexed | 2024-03-11T11:46:16Z |
| format | Article |
| id | doaj.art-27fef28ae8dc43a0a512897ccf736f50 |
| institution | Directory Open Access Journal |
| issn | 1347-2852 |
| language | English |
| last_indexed | 2024-03-11T11:46:16Z |
| publishDate | 2023-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Architecture and Building Engineering |
| spelling | doaj.art-27fef28ae8dc43a0a512897ccf736f502023-11-09T11:48:35ZengTaylor & Francis GroupJournal of Asian Architecture and Building Engineering1347-28522023-10-010011010.1080/13467581.2023.22649142264914Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequencyXin-Dai Zuo0Ying-Sheng Ni1Jin-Quan Zhang2Shang-Chuan Zhao3Research Institute of Highway Ministry of Transport, M.O.TResearch Institute of Highway Ministry of Transport, M.O.TResearch Institute of Highway Ministry of Transport, M.O.TResearch Institute of Highway Ministry of Transport, M.O.TIn order to obtain the fatigue stiffness degradation law of in-service concrete T-beam and carry out fatigue life prediction, a dual-stage stiffness degradation model considering cracks was established for T-beams and formulas for calculating the fundamental frequency of damaged concrete T-beams were deduced based on relevant theories of damage mechanics. The developed model aimed to investigate the influences of the fatigue stiffness degradation of in-service concrete T-beams on the natural vibration frequency of structures. A fatigue test was conducted for full-scale test beams to examine the crack development and fundamental frequency change law of structures during the fatigue process. Based on a full scale model of 10 m reinforced concrete T-beams, static and fatigue failure tests were carried out to obtain the evolution law of fatigue residual stiffness with load times. Fatigue damage coefficient D and stiffness degradation coefficient k were introduced to establish the fatigue life prediction model of T-beams in service. In line with the related test data and fundamental frequency formulas, stiffness updating methods were put forward for the concrete T-beam finite element models. By comparing the calculated value and test value of the natural vibration frequency of structures, the relative error was estimated to be within 6%. This verified the accuracy and reliability of the fundamental frequency calculation formulas and the updated finite element models. The research results can be used as a reference for the precise simulation of the fatigue damage finite element models of concrete T-beams. Finally, a method for life prediction of in-service reinforced concrete beam Bridges is proposed, and relevant research results can provide theoretical support for the study of life prediction of such Bridges.http://dx.doi.org/10.1080/13467581.2023.2264914concrete t-beamfatigue damagedual-stage modelstiffness degradationnatural vibration frequency |
| spellingShingle | Xin-Dai Zuo Ying-Sheng Ni Jin-Quan Zhang Shang-Chuan Zhao Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency Journal of Asian Architecture and Building Engineering concrete t-beam fatigue damage dual-stage model stiffness degradation natural vibration frequency |
| title | Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency |
| title_full | Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency |
| title_fullStr | Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency |
| title_full_unstemmed | Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency |
| title_short | Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency |
| title_sort | influences of fatigue stiffness degradation of in service concrete t beams on natural vibration frequency |
| topic | concrete t-beam fatigue damage dual-stage model stiffness degradation natural vibration frequency |
| url | http://dx.doi.org/10.1080/13467581.2023.2264914 |
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