|
| Study on anti-sliding safety of main cable in the cable-finished state of double-cable suspension bridge |
| Received:November 18, 2021 Revised:January 13, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20211118002 |
| KeyWord:bridge engineering double-cable suspension bridge numerical simulation construction stage cable-finished state main cable sliding-resistance |
| Author | Institution |
| 柴生波 |
西安科技大学 建筑与土木工程学院, 西安 |
| 吴骞 |
西安科技大学 建筑与土木工程学院, 西安 |
| 王秀兰 |
西安科技大学 建筑与土木工程学院, 西安 |
| 王克文 |
西安科技大学 建筑与土木工程学院, 西安 |
|
| Hits: 765 |
| Download times: 398 |
| Abstract: |
| In order to guide the selection of the right value of the sag-span ratio of the top and bottom cables and understand the anti-sliding stability of the main cable during the construction stage of double-cable suspension bridge, a theoretical calculation method of the sliding-resistance coefficient in the cable-finished state at construction stage is proposed.Based on the "the top cable to bottom cable" layout, the sag of the main cable in the cable-finished state is deduced through the bridge-finished state, according to the catenary shape of the main cable in the cable-finished state, the cable force and cornerite of the main cable on the tower top are calculated, and the sliding-resistance coefficient in the cable-finished state is calculated.The FE model of a multi-tower suspension bridge is established to verify the proposed formula, and the influence of different sag-span ratios of top and bottom cables and span on the variation of main cable sag from the cable-finished state to the bridge-finished state and the sliding-resistance coefficient are analyzed.The results show that the proposed formula has a satisfactory accuracy in calculating the sliding-resistance coefficient of the double-cable suspension bridge in the cable-finished state;The sag-span ratio of the top and bottom cables has a great impact on the anti-sliding safety of the main cable in the cable-finished state, the sliding-resistance coefficient decreases rapidly with the increase of the difference between the sag-span ratio of the top and bottom cables;The span has a small influence on the sliding-resistance coefficient of the main cable in the cable-finished state, and it increases marginally with span length.In the actual design process of the double-cable suspension bridge, the anti-sliding stability of the main cable at construction stage should be considered, the appropriate sag-span ratio of the top and bottom cables should be selected in combination with the measures to improve the anti-sliding stability. |
|
|
|