Wind Resistant Performance and Countermeasures for Cable-stayed Bridges with Open-section Girder
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Bibliographic Details
| Author(s): |
Yongxin Yang
(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)
Rui Zhou (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China) Yaojun Ge (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Conference: Structural Engineering: Providing Solutions to Global Challenges, Geneva, Switzerland, September 2015 | ||||
| Published in: | IABSE Conference Geneva 2015 | ||||
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| Page(s): | 204-211 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2015 | ||||
| DOI: | 10.2749/222137815818357124 | ||||
| Abstract: |
Even though open-section girders have been widely used in long-span cable-stayed bridges, their bluff shape and lower torsion stiffness generally lead to poor aerodynamic performance compared with more streamlined box girders. Based on a cable-stayed bridge with a main span of 400m, the flutter and vortex-induced vibration (VIV) performance of the open-section girder were investigated and evaluated, and different kinds of aerodynamic control measures were proposed to suppress VIV of the blunt open-section girder. The emphasis was put on the effectiveness of each measure on VIV mitigation, including wind fairings, apron boards, horizontal guide plates, vertical stabilizers, and airflow-depressing boards. Moreover, the influence of each VIV suppression-oriented aerodynamic measure on flutter performance of the open-section girder was also checked, and the optimal control scheme to improve the aerodynamic performance of open-section girder was finally achieved. |
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| Keywords: |
cable-stayed bridge vortex-induced vibration aerodynamic countermeasure flutter instability open-section girder
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