Conceptual Design of a New Three-Tower Cable-Stayed Bridge System with Unequal-Size Fans
Publication: Journal of Bridge Engineering
Volume 23, Issue 7
Abstract
Multitower cable-stayed bridges with three or more towers often have economic advantages over ultralong-span double-tower cable-stayed bridges or suspension bridges, in situations when deep foundations are not required. However, the internal towers of multitower cable-stayed bridges are not connected to stiff supports or foundations, and therefore the stiffness of the internal towers is lower than the side towers. As a result, when unbalanced live loads are applied to one main span, the deformation and internal forces of the internal towers and the main girder can be excessively large. Therefore, solving the low stiffness problem of the internal towers is an important issue for multitower cable-stayed bridges. In this paper, a new type of three-tower cable-stayed bridges is proposed. Since the stiffness contributed by the flanking towers is much greater than the central tower, the proportion of the main span supported by flanking tower cables can be increased, while the span supported by the central tower can be reduced. This can be achieved by modifying the design of the three fans, which originally had equal sizes. This new system is therefore called a three-tower cable-stayed bridge with unequal-size fans. The stiffness, internal forces, and cost of the new system were compared to the conventional three-tower cable-stayed bridges with identical fans, and it was found that this new system could be an excellent alternative to the conventional designs.
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Acknowledgments
The authors thank the following funders for their support to the studies in this paper: National Natural Science Foundation of China (Grant 51778223), Major Program of Science and Technology of Hunan Province (Grant 2017SK1010).
References
AASHTO. (2010). “AASHTO LRFD bridge design specifications.” Washington, DC.
Bergermann, R., and Schlaich, M. (1996). “Ting Kau Bridge, Hong Kong.” Struct. Eng. Int., 6(3), 152–154.
Carter, M., Kite, S., Hussain, N., Seywright, A., Glover, M., and Minto, B. (2009). “Forth replacement crossing: Scheme design of the bridge.” Iabse Symp. Rep., 96(6), 107–116.
JSCE (Japan Society of Civil Engineers). (2006). “Recommendations for design and construction of ultra high strength fiber reinforced concrete structures (Draft).” JSCE Guidelines for Concrete No. 9, Tokyo, Japan.
Kite, S., Carter, M., and Hussain, N. (2010). “Design of the forth replacement crossing, Scotland, UK.” IABSE Symp. Rep., 97(33), 55–62.
Kite, S., Hussain, N., and Carter, M. (2011). “Forth replacement crossing – Scotland, UK.” Procedia Engineering, 14(2), 1480–1484.
Ministry of Communications of P.R. China (2015). “General code for design of highway bridges and culverts.” JTG D60-2015, China Communications Press, Beijing.
Shao, X., Hu, J., Deng, L., and Cao, J. (2014). “Conceptual design of superspan partial ground-anchored cable-stayed bridge with crossing stay cables.” J. Bridge Eng., 06013001.
Sun, B., Xiao, R. C., and Cai, C. S. (2013). “Cost analysis of partially earth-anchored cable-stayed bridge.” J. Tongji Univ. (Nat. Sci.), 41(10), 1476–1482. (In Chinese)
Teyssandier, J. P. (2002). “Corinthian crossing.” Civil Eng., 72(10), 42–49.
Zhao, D. (2006). “Research on the static performance of the three towers concrete cable-stayed bridges.” Master’s thesis, Chang’an Univ., Xi’an, China. (In Chinese)
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 7 • July 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Nov 1, 2016
Accepted: Jan 19, 2018
Published online: Apr 26, 2018
Published in print: Jul 1, 2018
Discussion open until: Sep 26, 2018
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