Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge
The K-type joint, which consists of the web members and the chord members with varied angles welded together, has been widely adopted in long-span steel truss bridges. However, its fatigue performance has been rarely considered, despite its critical role in bridge structural safety and durability. A...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/12/10/1700 |
| _version_ | 1797471370845618176 |
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| author | Peng Liu Hongping Lu Yixuan Chen Jian Zhao Luming An Yuanqing Wang |
| author_facet | Peng Liu Hongping Lu Yixuan Chen Jian Zhao Luming An Yuanqing Wang |
| author_sort | Peng Liu |
| collection | DOAJ |
| description | The K-type joint, which consists of the web members and the chord members with varied angles welded together, has been widely adopted in long-span steel truss bridges. However, its fatigue performance has been rarely considered, despite its critical role in bridge structural safety and durability. Accordingly, the FE model of the K-type joint was established in Abaqus and the fatigue performance analysis was conducted, in which the effect of web/chord thickness ratio (<i>τ</i>), chord/web angle (θ), and chord with rib stiffener were investigated. Take the Mingzhu Bay steel truss arch bridge as an engineering background, the hot spot stress method was employed to calculate the fatigue performance of three K-type joints in unfavorable locations. Furthermore, a 3D full-scall bridge model was built to evaluate the fatigue performance of the K-type joints under standard and overloaded moving vehicle load scenarios. The results show that the max hot spot stress factor (<i>SCF<sub>max</sub></i>) of the web and chord member is influenced by τ and θ. The chord members added stiffener is founded to be an effective way to enhance fatigue performance. The fatigue stress intensities of the three unfavorable locations meet the Eurocode 3 specification requirements, but the one in the mid-truss arch is not satisfied under an overloaded vehicle loading rate of 25%. |
| first_indexed | 2024-03-09T19:47:29Z |
| format | Article |
| id | doaj.art-a09f52533c234ce68ebac25e490bd9af |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T19:47:29Z |
| publishDate | 2022-10-01 |
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| series | Metals |
| spelling | doaj.art-a09f52533c234ce68ebac25e490bd9af2023-11-24T01:19:19ZengMDPI AGMetals2075-47012022-10-011210170010.3390/met12101700Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch BridgePeng Liu0Hongping Lu1Yixuan Chen2Jian Zhao3Luming An4Yuanqing Wang5School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, ChinaSchool of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, ChinaChina Railway Construction Bridge Engineering Bureau Group Co., Ltd., Tianjin 300300, ChinaChina Railway Construction Bridge Engineering Bureau Group Co., Ltd., Tianjin 300300, ChinaDepartment of Civil Engineering, Tsinghua University, Beijing 100084, ChinaThe K-type joint, which consists of the web members and the chord members with varied angles welded together, has been widely adopted in long-span steel truss bridges. However, its fatigue performance has been rarely considered, despite its critical role in bridge structural safety and durability. Accordingly, the FE model of the K-type joint was established in Abaqus and the fatigue performance analysis was conducted, in which the effect of web/chord thickness ratio (<i>τ</i>), chord/web angle (θ), and chord with rib stiffener were investigated. Take the Mingzhu Bay steel truss arch bridge as an engineering background, the hot spot stress method was employed to calculate the fatigue performance of three K-type joints in unfavorable locations. Furthermore, a 3D full-scall bridge model was built to evaluate the fatigue performance of the K-type joints under standard and overloaded moving vehicle load scenarios. The results show that the max hot spot stress factor (<i>SCF<sub>max</sub></i>) of the web and chord member is influenced by τ and θ. The chord members added stiffener is founded to be an effective way to enhance fatigue performance. The fatigue stress intensities of the three unfavorable locations meet the Eurocode 3 specification requirements, but the one in the mid-truss arch is not satisfied under an overloaded vehicle loading rate of 25%.https://www.mdpi.com/2075-4701/12/10/1700K-type jointfatigue performancehot spot stressfinite element analysissteel truss arch bridge |
| spellingShingle | Peng Liu Hongping Lu Yixuan Chen Jian Zhao Luming An Yuanqing Wang Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge Metals K-type joint fatigue performance hot spot stress finite element analysis steel truss arch bridge |
| title | Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge |
| title_full | Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge |
| title_fullStr | Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge |
| title_full_unstemmed | Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge |
| title_short | Fatigue Performance Evaluation of K-Type Joints in Long-Span Steel Truss Arch Bridge |
| title_sort | fatigue performance evaluation of k type joints in long span steel truss arch bridge |
| topic | K-type joint fatigue performance hot spot stress finite element analysis steel truss arch bridge |
| url | https://www.mdpi.com/2075-4701/12/10/1700 |
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