Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years
Retrofitted super-span old T-shaped concrete beams (RS-OCT beams) are commonly used in highway bridges in coastal cities and offshore zones in China. The realization of a practical ultimate state for this beam under a bending load is still lacking. In this study, a flexural experiment on an original...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/8/1511 |
| _version_ | 1797584245672116224 |
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| author | Dongxu Hou Tieming Hu Guanhua Zhang Feng Jiang Liujie Wang |
| author_facet | Dongxu Hou Tieming Hu Guanhua Zhang Feng Jiang Liujie Wang |
| author_sort | Dongxu Hou |
| collection | DOAJ |
| description | Retrofitted super-span old T-shaped concrete beams (RS-OCT beams) are commonly used in highway bridges in coastal cities and offshore zones in China. The realization of a practical ultimate state for this beam under a bending load is still lacking. In this study, a flexural experiment on an original RS-OCT beam subjected to a long-term vehicle cyclical load was conducted in a laboratory. Several interesting phenomena were discovered. Notably, a butt-weld joint typically exists on longitudinal reinforced bars, which may be vulnerable to bending. The RS-OCT beam simultaneously suffered from the double function of atmospheric environment and fatigue during service. Based on the time-dependent and fatigue theories of materials, finite element analysis was performed using the ABAQUS software. The flexural behavior of the RS-OCT beam at various time periods was simulated. Subsequently, the flexural bearing capacities of the beams were calculated. The safety reservation of the RS-OCT beam at various time stages was related to the change in material properties and upgrading of the loading level. The latter plays a dominant role in the service state. |
| first_indexed | 2024-03-10T23:49:21Z |
| format | Article |
| id | doaj.art-4adccd3a43584d448f524701582270c3 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T23:49:21Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-4adccd3a43584d448f524701582270c32023-11-19T01:45:05ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-07-01118151110.3390/jmse11081511Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for YearsDongxu Hou0Tieming Hu1Guanhua Zhang2Feng Jiang3Liujie Wang4Construction Engineering Department, Shenyang University, Shenyang 110044, ChinaConstruction Engineering Department, Shenyang University, Shenyang 110044, ChinaLiaoning Provincial Transportation Planning and Design Institute Co., Ltd., Shenyang 110057, ChinaShenyang Construction Quality Testing Centre Co., Ltd., Shenyang 110004, ChinaConstruction Engineering Department, Shenyang University, Shenyang 110044, ChinaRetrofitted super-span old T-shaped concrete beams (RS-OCT beams) are commonly used in highway bridges in coastal cities and offshore zones in China. The realization of a practical ultimate state for this beam under a bending load is still lacking. In this study, a flexural experiment on an original RS-OCT beam subjected to a long-term vehicle cyclical load was conducted in a laboratory. Several interesting phenomena were discovered. Notably, a butt-weld joint typically exists on longitudinal reinforced bars, which may be vulnerable to bending. The RS-OCT beam simultaneously suffered from the double function of atmospheric environment and fatigue during service. Based on the time-dependent and fatigue theories of materials, finite element analysis was performed using the ABAQUS software. The flexural behavior of the RS-OCT beam at various time periods was simulated. Subsequently, the flexural bearing capacities of the beams were calculated. The safety reservation of the RS-OCT beam at various time stages was related to the change in material properties and upgrading of the loading level. The latter plays a dominant role in the service state.https://www.mdpi.com/2077-1312/11/8/1511RS-OCT beamcoastal regionflexural behaviorlong-termfatigue |
| spellingShingle | Dongxu Hou Tieming Hu Guanhua Zhang Feng Jiang Liujie Wang Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years Journal of Marine Science and Engineering RS-OCT beam coastal region flexural behavior long-term fatigue |
| title | Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years |
| title_full | Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years |
| title_fullStr | Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years |
| title_full_unstemmed | Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years |
| title_short | Research on the Flexural Behavior of a Coastwise RS-OCT Beam That Has Endured Long-Term Fatigue Load for Years |
| title_sort | research on the flexural behavior of a coastwise rs oct beam that has endured long term fatigue load for years |
| topic | RS-OCT beam coastal region flexural behavior long-term fatigue |
| url | https://www.mdpi.com/2077-1312/11/8/1511 |
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