Finding the optimum layout for cable-stayed bridge in conceptual design
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Bibliographic Details
| Author(s): |
Sami Soppela
(WSP Finland, University of Oulu, Oulu, Finland)
Esko Järvenpää (WSP Finland, University of Oulu, Oulu, Finland) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Resilient technologies for sustainable infrastructure, Christchurch, New Zealand, 3-5 February 2021 | ||||
| Published in: | IABSE Congress Christchurch 2020 | ||||
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| Page(s): | 374-381 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/christchurch.2021.0374 | ||||
| Abstract: |
In the cable-stayed bridges the primary cost components of the load-bearing material, in the longitudinal direction of the bridge, are the cables. The longer the bridge, the higher the share of the costs of the load-bearing material. The quantity of the cables and the cost optimized cable and tower topology can be reliably solved, already in very early design stages, using a simple calculation method proposed in this article. The cables are considered as a curtain structure and the cable forces are calculated for the permanent load balance. The solutions are performed mathematically by using integral calculus based on a force length method and a unit bridge concept. The results provide a good idea of the optimum pylon height for both one-pylon and two-pylon bridges. The optimum pylon height depends on the span ratio and the chosen cable system. |
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| Keywords: |
cable-stayed bridge cable force length cable quantity material quantity optimum pylon height unit bridge
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