Non-Linear Analysis of Suspension Bridges With Flexible and Rigid Cables

Abstract

One of the main problems related to the design of suspension bridges is stabilisation of their initial form. The tendency of suspension bridges to deform is generally determined by the kinematical displacements of the suspension cable caused by asymmetrical loads rather than by the elastic deformations. There are some suspension bridges when the so‐called rigid (stiff in bending) cables instead of usual flexible cables are suggested for stabilisation of their initial form. The analysis methods of such suspension bridges with rigid cables are underdeveloped. For the analysis of classical suspension bridges analytical models can be applied. However, in case of concentrated forces, the numerical techniques are preferred. The article presents analytical expressions for the calculation of internal forces and displacements of suspension bridges with a rigid cable. The article also discusses the discrete calculation model for classical suspension bridges. Santrauka Viena iš pagrindiniu kabamuju tiltu projektavimo problemu yra pradinus ju formos stabilizavimas. Kabamuju tiltu deformatyvuma lemia iš esmes ne tiek tampriosios deformacijos, kiek asimetriniu apkrovu sukelti kinematiniai kabamojo lyno poslinkiai. Yra žinomi kabamieji tiltai, kuriu pradinei formai stabilizuoti siūloma vietoje iprastiniu lanksčiuju lynu taikyti vadinamuosius standžius lynus. Tokiu kabamuju tiltu su standžiaislynais skaičiavimo metodai nera iki galo parengti. Klasikiniams tiltams su lanksčiu lynu skaičiuoti taikomi daugiausia kontinualūs modeliai, kurie esant tam tikrai tilto sandarai ar veikiant sutelktoms apkrovoms nera pakankamai tikslūs. Straipsnyje pateikiamos analizines išraiškos kabamuju tiltu su standžiu lynu iražoms ir poslinkiams apskaičiuoti, aptariamas diskretusis klasikiniu kabamuju tiltu skaičiavimo modelis.

Stability Problems of Steel‐concrete Members Composed of High‐strength Materials

“…Within the scope of modelling, the notions "optimization" and "reliability" has different meaning to different people (Atkočiūnas et al 1997(Atkočiūnas et al , 2008Merkevičiūtė, Atkočiūnas 2006;Šešok et al 2010;Jankovski and Atkočiūnas 2010). With the development of conceptions of the numerical analysis of advanced structures Juozapaitis, Norkus 2007;Juozapaitis et al 2008Juozapaitis et al , 2010, these procedures can contribute to a qualitative improvement of the reliability analysis of structures. In this regard it is generally necessary point out publications dedicated to research problems in the field of building material and their technologies Kinuthia et al 2009;Szwabowski and Łaźniewska-Piekarczyk 2009).…”

Unconventional Double-Level Structural System for Under-Deck Cable-Stayed Bridges

“…Subsequently, there are a significant number of the new forms of footbridges (Fib 2005) among which suspension and cable-stayed bridges (Strasky 2005) appear as highly efficient. Form-finding is an incessant process causing continuity in bridge design applying it for innovative bridges (Tanaka et al 2002;Rohde-Babarigos et al 2010;Juozapaitis et al 2006Juozapaitis et al , 2010Sandovič et al 2011).…”

Simplified Method of Determination of Natural-Vibration Frequencies of Prestressed Suspension Bridge

“…The bridge with the longest centre span of 1991 m is the Akashi Kaikyo Bridge [3]. So long spans can be achieved because main load carrying cables are subjected to tension and distribution of normal stresses are close to uniform [4].…”