Abstract
Suspension bridges are characterized by exceptional architectural expressions and excellent technical and economic properties. However, despite all advantages, suspension bridges have a few negative features. Suspension bridges with flexible cables share excessive deformation caused by the displacement of kinematic origin. In order to increase the stiffness of suspension bridges, an innovative structural solution refers to rigid cables used instead of the flexible ones. The paper describes a methodology for calculating an asymmetric single-pylon suspension bridge with rigid cables considering installation features. Also, the article presents the numerical simulation of the bridge and determines the accuracy of the proposed methodology.
Highlights
The structures of suspension bridges are characterized by the high effectiveness of overlapping large spans and exceptional architectural expression (Gimsing & Georgakis, 2012; Ryall et al, 2000; Troyano, 2003)
The made assumption is partly valid for analysing the complete structure of the bridge, but local flexure occurs above the pylons and at the attachment points of flexible cables and hangers
The methods for calculating and analysing classical suspension bridges with flexible cables for estimating local flexure are discussed in works by (Caballero & Pose, 2010; Furst et al, 2001; Gimsing & Georgakis, 2012; Juozapaitis & Norkus, 2005, 2007)
Summary
The structures of suspension bridges are characterized by the high effectiveness of overlapping large spans and exceptional architectural expression (Gimsing & Georgakis, 2012; Ryall et al, 2000; Troyano, 2003). The simplified methodology for calculating the classical symmetric single-span bridge with rigid cables is provided in (Grigorjeva et al, 2010a). The paper provides the simplified calculation methodology for the asymmetric single-pylon suspension bridge with rigid cables considering the effects of symmetric and asymmetric loading and applying the second installation method where the cable is completely flexible under symmetric installation loads and the components of the individual segments of the cable are stiffened before loading it with operational loads. The proposed simplified methodology for the asymmetric single-pylon suspension bridge is based on the techniques for calculating the classical suspension bridge with rigid cables and has been put forward by the authors of the article (Grigorjeva et al, 2010a; Grigorjeva & Juozapaitis, 2013).
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