Influence of temperature effects on the pylon-beam support system of cable-stayed bridges
In order to explore the stress characteristics of a single-tower multi-span cable-stayed bridge under system temperature effects, taking a multi-span cable-stayed bridge project as an example, a full-bridge finite element model is established based on Midas/civil software to analyze the temperature...
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Science Press (China Science Publishing & Media Ltd.)
2024-09-01
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| Series: | Shenzhen Daxue xuebao. Ligong ban |
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| Online Access: | https://journal.szu.edu.cn/en/#/digest?ArticleID=2688 |
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| author | ZHAO Licai |
| author_facet | ZHAO Licai |
| author_sort | ZHAO Licai |
| collection | DOAJ |
| description | In order to explore the stress characteristics of a single-tower multi-span cable-stayed bridge under system temperature effects, taking a multi-span cable-stayed bridge project as an example, a full-bridge finite element model is established based on Midas/civil software to analyze the temperature effects of the multi-span cable-stayed bridge under different pier-beam support systems. The following five combinations of pier-beam support system schemes are studied. 1) The secondary side tower, side tower, and central tower are all fully rigidly connected (System 1). 2) Side tower is hinged at the pier-beam, while the secondary side tower and central towers are rigidly connected (System 2). 3) The secondary side tower and side towers are hinged at the pier-beam, while the central tower is rigidly connected (System 3). 4) The secondary side tower is rigidly connected, while side and central towers are hinged at the pier-beam (System 4). 5) Side tower is rigidly connected, while the secondary side tower and central towers are hinged at the pier-beam (System 5). The study analyzes the stress and displacement variations of the main beam and main tower under a temperature change of +20 ℃ or -20 ℃ for the five different support system configurations. The research shows that the temperature effect significantly influences the displacement and stress of the main beam and main tower under the fully fixed support system. For System 1, at a temperature difference of 20 ℃, the maximum displacements of the main beam and main tower are 66.6 mm and 94.07 mm, with stresses of 5.95 MPa and 5.96 MPa, respectively. The temperature effect has a significant impact on the displacement of the main beam and main tower under the support system where only the middle tower is fixed and the rests are hinged, but has a minor effect on their stress. For System 3, at a temperature difference of 20 ℃, the maximum displacements of the main beam and main tower are 74.20 mm and 70.67 mm, with stresses of 0.59 MPa and 0.48 MPa, respectively. Under the same temperature conditions, when any two of the middle tower, side tower, and the secondary side tower positions are fixed while the rests are hinged, the main beam structural response of middle tower, the secondary side tower and side tower show a high degree of similarity, and the temperature effect on the displacement and stress of the main beam structure is between the results of System 4 and System 5. The research findings can provide reference for the construction line shape control of the main beam of multi-span cable-stayed bridges. |
| format | Article |
| id | doaj-art-d6a293e59b7a4039bc9fbbc585267017 |
| institution | DOAJ |
| issn | 1000-2618 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Science Press (China Science Publishing & Media Ltd.) |
| record_format | Article |
| series | Shenzhen Daxue xuebao. Ligong ban |
| spelling | doaj-art-d6a293e59b7a4039bc9fbbc5852670172025-08-20T03:01:50ZengScience Press (China Science Publishing & Media Ltd.)Shenzhen Daxue xuebao. Ligong ban1000-26182024-09-0141563564210.3724/SP.J.1249.2024.056351000-2618（2024）05-0635-08Influence of temperature effects on the pylon-beam support system of cable-stayed bridgesZHAO LicaiIn order to explore the stress characteristics of a single-tower multi-span cable-stayed bridge under system temperature effects, taking a multi-span cable-stayed bridge project as an example, a full-bridge finite element model is established based on Midas/civil software to analyze the temperature effects of the multi-span cable-stayed bridge under different pier-beam support systems. The following five combinations of pier-beam support system schemes are studied. 1) The secondary side tower, side tower, and central tower are all fully rigidly connected (System 1). 2) Side tower is hinged at the pier-beam, while the secondary side tower and central towers are rigidly connected (System 2). 3) The secondary side tower and side towers are hinged at the pier-beam, while the central tower is rigidly connected (System 3). 4) The secondary side tower is rigidly connected, while side and central towers are hinged at the pier-beam (System 4). 5) Side tower is rigidly connected, while the secondary side tower and central towers are hinged at the pier-beam (System 5). The study analyzes the stress and displacement variations of the main beam and main tower under a temperature change of +20 ℃ or -20 ℃ for the five different support system configurations. The research shows that the temperature effect significantly influences the displacement and stress of the main beam and main tower under the fully fixed support system. For System 1, at a temperature difference of 20 ℃, the maximum displacements of the main beam and main tower are 66.6 mm and 94.07 mm, with stresses of 5.95 MPa and 5.96 MPa, respectively. The temperature effect has a significant impact on the displacement of the main beam and main tower under the support system where only the middle tower is fixed and the rests are hinged, but has a minor effect on their stress. For System 3, at a temperature difference of 20 ℃, the maximum displacements of the main beam and main tower are 74.20 mm and 70.67 mm, with stresses of 0.59 MPa and 0.48 MPa, respectively. Under the same temperature conditions, when any two of the middle tower, side tower, and the secondary side tower positions are fixed while the rests are hinged, the main beam structural response of middle tower, the secondary side tower and side tower show a high degree of similarity, and the temperature effect on the displacement and stress of the main beam structure is between the results of System 4 and System 5. The research findings can provide reference for the construction line shape control of the main beam of multi-span cable-stayed bridges.https://journal.szu.edu.cn/en/#/digest?ArticleID=2688bridge engineeringlow-tower cable-stayed bridgetemperature effectpier and beam consolidationsupport systemstructural response |
| spellingShingle | ZHAO Licai Influence of temperature effects on the pylon-beam support system of cable-stayed bridges Shenzhen Daxue xuebao. Ligong ban bridge engineering low-tower cable-stayed bridge temperature effect pier and beam consolidation support system structural response |
| title | Influence of temperature effects on the pylon-beam support system of cable-stayed bridges |
| title_full | Influence of temperature effects on the pylon-beam support system of cable-stayed bridges |
| title_fullStr | Influence of temperature effects on the pylon-beam support system of cable-stayed bridges |
| title_full_unstemmed | Influence of temperature effects on the pylon-beam support system of cable-stayed bridges |
| title_short | Influence of temperature effects on the pylon-beam support system of cable-stayed bridges |
| title_sort | influence of temperature effects on the pylon beam support system of cable stayed bridges |
| topic | bridge engineering low-tower cable-stayed bridge temperature effect pier and beam consolidation support system structural response |
| url | https://journal.szu.edu.cn/en/#/digest?ArticleID=2688 |
| work_keys_str_mv | AT zhaolicai influenceoftemperatureeffectsonthepylonbeamsupportsystemofcablestayedbridges |