A numerical study on the structural integrity of self-anchored cable-stayed suspension bridges
Journal Title: Frattura ed Integrità Strutturale - Year 2016, Vol 10, Issue 38
Abstract
A generalized numerical model for predicting the structural integrity of self-anchored cable-stayed suspension bridges considering both geometric and material nonlinearities is proposed. The bridge is modeled by means of a 3D finite element approach based on a refined displacement-type finite element approximation, in which geometrical nonlinearities are assumed in all components of the structure. Moreover, nonlinearities produced by inelastic material and second order effects in the displacements are considered for girder and pylon elements, which combine gradual yielding theory with CRC tangent modulus concept. In addition, for the elements of the suspension system, i.e. stays, hangers and main cable, a finite plasticity theory is adopted to fully evaluate both geometric and material nonlinearities. In this framework, the influence of geometric and material nonlinearities on the collapse bridge behavior is investigated, by means of a comparative study, which identifies the effects produced on the ultimate bridge behavior of several sources of bridge nonlinearities involved in the bridge components. Results are developed with the purpose to evaluate numerically the influence of the material and geometric characteristics of self-anchored cable-stayed suspension bridges with respect also to conventional bridge based on cablestayed or suspension schemes
Authors and Affiliations
Paolo Lonetti, Arturo Pascuzzo
Keywords
Related Articles
- EP ID EP138987
- DOI 10.3221/IGF-ESIS.38.46
- Views 88
- Downloads 0
Investigation of very high cycle fatigue by thermographyc method
Nowadays, many components and structures are subjected to fatigue loading with a number of cycles higher than 107. In this scientific work, the behaviour of two kinds of tool steel was investigated in very high cy...
A review of thermographic techniques for damage investigation in composites
The aim of this work is a review of scientific results in the literature, related to the application of thermographic techniques to composite materials. Thermography is the analysis of the surface temperature of a...
Analisi termica per la valutazione del comportamento a fatica di provini soggetti a successive serie di carichi
Partendo dalla osservazione che provini precedentemente danneggiati hanno un limite di fatica differente (vedi Miner) viene esaminato il comportamento di un acciaio soggetto a serie di carichi affaticanti al fine di veri...
A numerical approach for the analysis of deformable journal bearings
This paper presents a numerical approach for the analysis of hydrodynamic radial journal bearings. The effect of shaft and housing elastic deformation on pressure distribution within oil film is investigated. An it...
Limit analysis on FRP-strengthened RC members
Reinforced concrete (RC) members strengthened with externally bonded fiber-reinforced-polymer(FRP) plates are numerically investigated by a plasticity-based limit analysis approach. The key-concept of thepresent ap...