Structural Characteristics and Applicability of Four-Span Suspension Bridge
Publication: Journal of Bridge Engineering
Volume 9, Issue 5
Abstract
A four-span suspension bridge which has two main 2,000 m spans is investigated with respect to the deformation characteristics. Generally, deformation behavior of the four-span suspension bridge is mainly influenced by rigidity of the center tower. This study is focused on properties such as bending and torsional rigidity of the girder, sag ratio, and dead load. The result of this investigation clarified that the lower rigidity under live load than the three-span bridge is caused by the smaller cable spring coefficient of the main span, which is 1/6 of the side span. Nevertheless, the tendency is stable and can be assisted by stiffened rigidity of the center tower. Live load deflection of the girder can be reduced to less than 1/200 of the main span length, which is useful and economical, by stiffening the bending coefficient of the center tower. Moreover, relatively lower rigidity of the center tower is sufficient for the 2,000 m span suspension bridge than for the 1,000 m span case, keeping the same deflection ratio. Three-dimensional sag geometry of the main cable is effective in limiting the torsional deformation, which is an especially important issue for the four-span suspension bridge caused by twist of the center tower.
Get full access to this article
View all available purchase options and get full access to this article.
References
Fukuda, T.(1975). “Multispan suspension bridges under torsional loading.” J. Jpn. Soc. Civ. Eng., 242, October, 91–103.
Fukuda, T. (1976). “Analysis of multispan suspension bridges.” J. Struct. Div., June, 63–86.
Gimsing, N. J. (1983). Cable supported bridges concept and design, Wiley, New York.
Nazir, C. P.(1986). “Multispan balanced suspension bridge.” J. Struct. Eng., 112(11), 2512–2527.
Sato, K. (1971). “Deflection theory of multispan suspension bridges considering deflection of towers and its numerical examples of various influence lines.” Proc., Jpn. Soc. Civ. Eng., 190, 11–22 (in Japanese).
Strasky, J.(1997). “Design-construction of Vranov Lake pedestrian bridge, Czech Republic.” PCI J., 42(6), 60–75.
Toriumi, R., Satou, H., and Watanabe, M. (1994). “Aerodynamic stability of ultra long span suspension bridge with twin-box girder.” Proc., Annual Conf., Japan Society of Civil Engineers, Tokyo, 1118–1119 (in Japanese).
Information & Authors
Information
Published In
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jun 24, 2002
Accepted: Mar 6, 2003
Published online: Aug 16, 2004
Published in print: Sep 2004
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.