Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum
Vehicle overload is detrimental to bridges and traffic safety. This paper presents a study on the fatigue performance of typical reinforced concrete (RC) beams of highway bridges under vehicle overload. A definition method of vehicle overload and a construction method of overload ladder spectrum wer...
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| Format: | Article |
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MDPI AG
2018-10-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/10/3321 |
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| author | Zhan-Biao Chen Pei-Yan Huang Zheng-Wei Li Xin-Yan Guo Chen Zhao Xiao-Hong Zheng Yi Yang |
| author_facet | Zhan-Biao Chen Pei-Yan Huang Zheng-Wei Li Xin-Yan Guo Chen Zhao Xiao-Hong Zheng Yi Yang |
| author_sort | Zhan-Biao Chen |
| collection | DOAJ |
| description | Vehicle overload is detrimental to bridges and traffic safety. This paper presents a study on the fatigue performance of typical reinforced concrete (RC) beams of highway bridges under vehicle overload. A definition method of vehicle overload and a construction method of overload ladder spectrum were first proposed based on traffic data acquisition, statistical analysis and structural calculation of the highway bridges in Guangzhou. A fatigue experimental method was also proposed with the three-ladder vehicle overload spectrum, and the fatigue tests of 15 RC beams strengthened with carbon fiber reinforced polymer (CFRP) under three loading levels were then carried out. The fatigue performance and the failure mechanism of the strengthened beams were presented and discussed, and two fatigue life prediction methods were proposed with the established modified Palmgren-Miner rule and the loading level equivalent method respectively. The results showed that the fatigue performance of the strengthened RC beams was severely degraded under overload ladder spectrum compared with that under constant amplitude cyclic load, and the life prediction methods were proved effective. |
| first_indexed | 2024-04-14T00:47:20Z |
| format | Article |
| id | doaj.art-a590765923494219a24c2663f51d2623 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T00:47:20Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a590765923494219a24c2663f51d26232022-12-22T02:21:58ZengMDPI AGSensors1424-82202018-10-011810332110.3390/s18103321s18103321Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder SpectrumZhan-Biao Chen0Pei-Yan Huang1Zheng-Wei Li2Xin-Yan Guo3Chen Zhao4Xiao-Hong Zheng5Yi Yang6School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaGuangzhou Communication Investment Group CO. LTD., Guangzhou 510288, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaVehicle overload is detrimental to bridges and traffic safety. This paper presents a study on the fatigue performance of typical reinforced concrete (RC) beams of highway bridges under vehicle overload. A definition method of vehicle overload and a construction method of overload ladder spectrum were first proposed based on traffic data acquisition, statistical analysis and structural calculation of the highway bridges in Guangzhou. A fatigue experimental method was also proposed with the three-ladder vehicle overload spectrum, and the fatigue tests of 15 RC beams strengthened with carbon fiber reinforced polymer (CFRP) under three loading levels were then carried out. The fatigue performance and the failure mechanism of the strengthened beams were presented and discussed, and two fatigue life prediction methods were proposed with the established modified Palmgren-Miner rule and the loading level equivalent method respectively. The results showed that the fatigue performance of the strengthened RC beams was severely degraded under overload ladder spectrum compared with that under constant amplitude cyclic load, and the life prediction methods were proved effective.http://www.mdpi.com/1424-8220/18/10/3321vehicle overloadoverload ladder spectrumfatigue performancecarbon fiber reinforced polymer (CFRP)reinforced concrete (RC) beams |
| spellingShingle | Zhan-Biao Chen Pei-Yan Huang Zheng-Wei Li Xin-Yan Guo Chen Zhao Xiao-Hong Zheng Yi Yang Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum Sensors vehicle overload overload ladder spectrum fatigue performance carbon fiber reinforced polymer (CFRP) reinforced concrete (RC) beams |
| title | Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum |
| title_full | Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum |
| title_fullStr | Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum |
| title_full_unstemmed | Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum |
| title_short | Fatigue Performance of RC Beams Strengthened with CFRP under Overloads with a Ladder Spectrum |
| title_sort | fatigue performance of rc beams strengthened with cfrp under overloads with a ladder spectrum |
| topic | vehicle overload overload ladder spectrum fatigue performance carbon fiber reinforced polymer (CFRP) reinforced concrete (RC) beams |
| url | http://www.mdpi.com/1424-8220/18/10/3321 |
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