Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load
Abstract The significant load disparity between the two decks of a cable-stayed bridge with separated unequal-width decks results in complex asymmetric static effects in the jointed dual-pylon. To investigate the structural behaviour and reliability of the jointed dual-pylon under asymmetric loads,...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Advances in Bridge Engineering |
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| Online Access: | https://doi.org/10.1186/s43251-024-00149-x |
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| _version_ | 1832585535993937920 |
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| author | Chao Luo Jingzhou Xin Jiafeng Yang Yan Jiang Lei Huang Jianting Zhou |
| author_facet | Chao Luo Jingzhou Xin Jiafeng Yang Yan Jiang Lei Huang Jianting Zhou |
| author_sort | Chao Luo |
| collection | DOAJ |
| description | Abstract The significant load disparity between the two decks of a cable-stayed bridge with separated unequal-width decks results in complex asymmetric static effects in the jointed dual-pylon. To investigate the structural behaviour and reliability of the jointed dual-pylon under asymmetric loads, a 1:30 scaled model test and numerical simulation were conducted based on the world's first road-railway same-level cable-stayed bridge with jointed pylons. The test results indicate when the unbalanced horizontal force of the jointed dual-pylon structure reaches its maximum during the service phase, the stress at the dual-pylon connectivity node remains relatively low, indicating good shear resistance of the dual-pylon connectivity node. Structural failure occurs when the load reaches 1.82 times the maximum shear stress at the tower column merging section, and the railway beam will experience severe cracking and stiffness degradation, ultimately leading to loss of bearing capacity. The calculation results further reveal that under the combined action of dead load, full-span moving load, and lateral wind load, the minimum calculated nonlinear stability coefficient of the dual-pylon connectivity node is 1.65. Moving load and longitudinal wind load have minimal impact on the nonlinear stability coefficient, and the dead load and lateral wind load primarily govern the failure of the dual-pylon connectivity node. |
| format | Article |
| id | doaj-art-f2fe36494b364dce92fc479385654803 |
| institution | Kabale University |
| issn | 2662-5407 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Advances in Bridge Engineering |
| spelling | doaj-art-f2fe36494b364dce92fc4793856548032025-01-26T12:45:21ZengSpringerOpenAdvances in Bridge Engineering2662-54072025-01-016112110.1186/s43251-024-00149-xShear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric loadChao Luo0Jingzhou Xin1Jiafeng Yang2Yan Jiang3Lei Huang4Jianting Zhou5State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong UniversityState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong UniversitySchool of Civil Engineering, Central South UniversityState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong UniversityState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong UniversityState Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong UniversityAbstract The significant load disparity between the two decks of a cable-stayed bridge with separated unequal-width decks results in complex asymmetric static effects in the jointed dual-pylon. To investigate the structural behaviour and reliability of the jointed dual-pylon under asymmetric loads, a 1:30 scaled model test and numerical simulation were conducted based on the world's first road-railway same-level cable-stayed bridge with jointed pylons. The test results indicate when the unbalanced horizontal force of the jointed dual-pylon structure reaches its maximum during the service phase, the stress at the dual-pylon connectivity node remains relatively low, indicating good shear resistance of the dual-pylon connectivity node. Structural failure occurs when the load reaches 1.82 times the maximum shear stress at the tower column merging section, and the railway beam will experience severe cracking and stiffness degradation, ultimately leading to loss of bearing capacity. The calculation results further reveal that under the combined action of dead load, full-span moving load, and lateral wind load, the minimum calculated nonlinear stability coefficient of the dual-pylon connectivity node is 1.65. Moving load and longitudinal wind load have minimal impact on the nonlinear stability coefficient, and the dead load and lateral wind load primarily govern the failure of the dual-pylon connectivity node.https://doi.org/10.1186/s43251-024-00149-xCable-stayed bridge with separated unequal-width decksJointed dual-pylonDual-pylon connectivity nodeModel testNumerical simulation |
| spellingShingle | Chao Luo Jingzhou Xin Jiafeng Yang Yan Jiang Lei Huang Jianting Zhou Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load Advances in Bridge Engineering Cable-stayed bridge with separated unequal-width decks Jointed dual-pylon Dual-pylon connectivity node Model test Numerical simulation |
| title | Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load |
| title_full | Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load |
| title_fullStr | Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load |
| title_full_unstemmed | Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load |
| title_short | Shear properties of jointed dual-pylon of the cable-stayed bridge with separated unequal-width decks under asymmetric load |
| title_sort | shear properties of jointed dual pylon of the cable stayed bridge with separated unequal width decks under asymmetric load |
| topic | Cable-stayed bridge with separated unequal-width decks Jointed dual-pylon Dual-pylon connectivity node Model test Numerical simulation |
| url | https://doi.org/10.1186/s43251-024-00149-x |
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