Analysis of innovative two-span suspension bridges

Abstract

Recently, two-span, or the so-called single pylon suspension bridges, due to their constructing structure, have been widely applied. A reduction in deformation seems to be the main problem of the behaviour and design of such bridges. The deformation of suspension bridges is mainly determined by cable kinematic displacements caused by temporary loadings rather than by elastic deformations. Not all known methods for the stabilization of the initial form of suspension bridges are suitable for single pylon bridges. The employment of the so-called rigid cables that increase the general stiffness of the suspension bridge appears to be one of the innovative methods for stabilizing the initial form of single pylon suspension bridges. Rigid cables are designed from standard steel profiles and, compared to the common ones made of spiral and parallel wires, are more resistant to corrosion. Moreover, the construction joints, in terms of fabrication and installation, have a simpler form. However, calculation methods for such single pylon suspension bridges with rigid cables are not sufficiently prepared. Only single publications on the analysis of the behaviour of one or three-span suspension bridges with rigid cables have been available so far. The paper presents analytical expressions to calculate the displacements and internal forces of suspension bridges with rigid cables thus assessing the sequence of cable installation. Also, the paper describes the sequence of iterative calculation.

Experimental investigation on stiffness and strength of single-lap z-pinned joints in a laminated CFRP stress-ribbon strip

“…Stress-ribbon structural system can be considered as the most efficient for pedestrian bridges (Juozapaitis et al 2015). A pre-stressed concrete deck with the shape of a catenary forms the stress-ribbon structure.…”

The Simplified Analysis of the Asymmetric Single-Pylon Suspension Bridge With Rigid Cables

“…The main drawback of analogous bridges includes excessive deformation due to the displacement of kinematic origin and is greatly affected by asymmetric loading (Kiisa et al, 2012;Kulbach, 2007;Sandovič et al, 2011). Thus, a sufficient variety of structural measures have been proposed to reduce the occurring kinematic displacements (Juozapaitis et al, 2015;Goremkins et al, 2012;Jennings, 1987;Strasky, 2005). A huge number of analytical calculation methods for classical suspension bridges with flexible cables are based on nonlinear calculation in line to the deformed scheme (Arco & Aparicio, 2001;Clemente et al, 2000;Gimsing & Georgakis, 2012;Idnurm, 2006;Jennings, 1987;Kim & Thai, 2010;Kulbach, 2007;Wollmann, 2001).…”

Development of an anchorage prototype for CFRP stress-ribbon systems using 3D printing technique

“…Stress-ribbon structural system is one of the oldest bridge types. It is efficient for pedestrian bridges (Juozapaitis et al, 2015). Compared with other structures, stress-ribbon systems are extremely simple -structures behaviour corresponds to a cable hanging freely between two supports; the gravity load stabilizes deformations.…”