Abstract
Suspension bridges are one of the most effective bridge structures used for large spans to overlap. Recently, not only the single-span bridges but also multi-span suspension bridges have been used. The main issue of design and analysis shall consider the excessive deformability induced by the interaction of flexible and kinematic displacement. Stabilization of suspension bridges could be ensured by various means. The most effective and up-to-date measure applied to reduce displacements of suspension bridges is the application of the so-called “rigid” cables with appropriate bending stiffness instead of conventional flexible cables. These retaining elements demonstrate high corrosion stability; their cross-sections are designed using conventional structural steel sections, factory and fabricated connections are simple and firm. The main advanced feature of these cables is that these elements along with the suspended stiffening girder stabilize the initial shape of the bridge effectively. It shall be noted that analysis methods applied for these innovative three-span suspension bridges with “rigid” cables are still under development. There are only few individual publications describing the behaviour of a single-span suspension bridge. The article describes the modern suspension three-span bridge and provides analytic expressions of internal forces and displacements calculated considering the erection sequence.
Highlights
Suspension bridges, due to their excellent technical performance, are widely used for centuries
It shall be noted that analysis methods applied for these innovative three-span suspension bridges with “rigid” cables are still under development
The article describes the behaviour of suspension multi-span bridge with “rigid” cables under the impact of symmetric loads, provides formulas to be applied for calculation of internal forces and displacements of the aforementioned bridge considering the non-linear behavior, and deals with analysis method considering the erection sequence of “rigid” cables
Summary
Suspension bridges, due to their excellent technical performance, are widely used for centuries. The required rigidity of suspension bridge (minimization of kinematic displacements) is ensured by the application of the so-called “rigid” cables instead of conventional flexible cables (Grigorjeva et al 2010; Juozapaitis et al 2006, 2010). These cables are corrosion-resistant and made of standard hot-rolled or welded steel cross sections and their factory and fabricated connections are simple and firm. The article describes the behaviour of suspension multi-span bridge with “rigid” cables under the impact of symmetric loads, provides formulas to be applied for calculation of internal forces and displacements of the aforementioned bridge considering the non-linear behavior, and deals with analysis method considering the erection sequence of “rigid” cables
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