Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage
In the whole lifetime of structures, fatigue damage accumulation will exist in the shear connector of steel–concrete composite beams. It is essential to determine the residual mechanical properties of shear connectors under long-term fatigue loads, e.g., the vehicle load on bridges. In this regard,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/12/12/2141 |
| _version_ | 1797461149972692992 |
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| author | Xiao-Wei Zheng Heng-Lin Lv Hong Fan Yan-Bing Zhou |
| author_facet | Xiao-Wei Zheng Heng-Lin Lv Hong Fan Yan-Bing Zhou |
| author_sort | Xiao-Wei Zheng |
| collection | DOAJ |
| description | In the whole lifetime of structures, fatigue damage accumulation will exist in the shear connector of steel–concrete composite beams. It is essential to determine the residual mechanical properties of shear connectors under long-term fatigue loads, e.g., the vehicle load on bridges. In this regard, a shear-strength degradation model is proposed for shear connectors. The Bayes theorem is used to develop posterior estimates of the unknown parameters in the degradation model based on the collected pushout test data of pre-damaged stud connectors caused by high-cycle fatigue loads. In addition, according to the proposed shear-strength degradation model, the service reliability assessment is performed with a composite bridge beam. The results indicate that (1) There is a large diversion in the traditional strength degradation model under the action of fatigue cumulative damage. More importantly, this proposed physics-based degradation model can effectively reduce uncertainty. (2) The effects of steel type and test specimen size can be well considered in the proposed shear-strength degradation model, which is beneficial for improving the reliability of risk assessment for fatigued bridges. |
| first_indexed | 2024-03-09T17:15:19Z |
| format | Article |
| id | doaj.art-7ad0cef60bb64e40a1f03cff3d51e1d4 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T17:15:19Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-7ad0cef60bb64e40a1f03cff3d51e1d42023-11-24T13:42:31ZengMDPI AGBuildings2075-53092022-12-011212214110.3390/buildings12122141Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative DamageXiao-Wei Zheng0Heng-Lin Lv1Hong Fan2Yan-Bing Zhou3Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaJiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaKey Laboratory of Urban Safety Risk Monitoring and Early Warning, Shenzhen Urban Public Safety and Technology Institute Co., Ltd., Shenzhen 518000, ChinaKey Laboratory of Urban Safety Risk Monitoring and Early Warning, Shenzhen Urban Public Safety and Technology Institute Co., Ltd., Shenzhen 518000, ChinaIn the whole lifetime of structures, fatigue damage accumulation will exist in the shear connector of steel–concrete composite beams. It is essential to determine the residual mechanical properties of shear connectors under long-term fatigue loads, e.g., the vehicle load on bridges. In this regard, a shear-strength degradation model is proposed for shear connectors. The Bayes theorem is used to develop posterior estimates of the unknown parameters in the degradation model based on the collected pushout test data of pre-damaged stud connectors caused by high-cycle fatigue loads. In addition, according to the proposed shear-strength degradation model, the service reliability assessment is performed with a composite bridge beam. The results indicate that (1) There is a large diversion in the traditional strength degradation model under the action of fatigue cumulative damage. More importantly, this proposed physics-based degradation model can effectively reduce uncertainty. (2) The effects of steel type and test specimen size can be well considered in the proposed shear-strength degradation model, which is beneficial for improving the reliability of risk assessment for fatigued bridges.https://www.mdpi.com/2075-5309/12/12/2141strength degradationfatigue cumulative damageBayes theoremstud connectorcomposite beam |
| spellingShingle | Xiao-Wei Zheng Heng-Lin Lv Hong Fan Yan-Bing Zhou Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage Buildings strength degradation fatigue cumulative damage Bayes theorem stud connector composite beam |
| title | Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage |
| title_full | Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage |
| title_fullStr | Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage |
| title_full_unstemmed | Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage |
| title_short | Physics-Based Shear-Strength Degradation Model of Stud Connector with the Fatigue Cumulative Damage |
| title_sort | physics based shear strength degradation model of stud connector with the fatigue cumulative damage |
| topic | strength degradation fatigue cumulative damage Bayes theorem stud connector composite beam |
| url | https://www.mdpi.com/2075-5309/12/12/2141 |
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