Balance and Costs of Cable-Stayed Bridges with Inclined and Curved Tower Shapes
Jutila, Aarne; Järvenpää, Esko; Quach, Tung T. (2021-08-12)
Jutila, Aarne
Järvenpää, Esko
Quach, Tung T.
Taylor & Francis
12.08.2021
Jutila, A., Järvenpää, E., & Quach, T. T. (2021). Balance and Costs of Cable-Stayed Bridges with Inclined and Curved Tower Shapes. Structural Engineering International, 31(4), 498–503. https://doi.org/10.1080/10168664.2021.1929666
https://creativecommons.org/licenses/by-nc-nd/4.0/
© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
https://creativecommons.org/licenses/by-nc-nd/4.0/
© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
https://creativecommons.org/licenses/by-nc-nd/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202410156302
https://urn.fi/URN:NBN:fi:oulu-202410156302
Tiivistelmä
Abstract
Although engineers can analyse demanding structures, basic understanding of the structural behaviour is not always clear to them. This is particularly true with cable-stayed bridges having asymmetric spans and inclined or even curved towers. To improve this situation, the present paper with a new simple design approach method is introduced. The method is useful at the conceptual design stage, when only the geometry of the bridge and the approximate weight of the main span is known or easily estimated. No deeper-going computer analysis is needed, but knowledge of basic graphic statics is required. In the paper, analytic formulae are derived for the cable quantity and balancing loads needed. Only harp-type cable-stayed bridges are discussed. The approach is based on the so-called force–length method and curtain cables. The formulae are useful when comparing alternative bridge solutions, or when determining the back-span cable forces and balancing weights needed, especially with curved towers.
Although engineers can analyse demanding structures, basic understanding of the structural behaviour is not always clear to them. This is particularly true with cable-stayed bridges having asymmetric spans and inclined or even curved towers. To improve this situation, the present paper with a new simple design approach method is introduced. The method is useful at the conceptual design stage, when only the geometry of the bridge and the approximate weight of the main span is known or easily estimated. No deeper-going computer analysis is needed, but knowledge of basic graphic statics is required. In the paper, analytic formulae are derived for the cable quantity and balancing loads needed. Only harp-type cable-stayed bridges are discussed. The approach is based on the so-called force–length method and curtain cables. The formulae are useful when comparing alternative bridge solutions, or when determining the back-span cable forces and balancing weights needed, especially with curved towers.
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