Dynamic impact analysis of long span cable-stayed bridges under moving loads

Bruno, Domenico; Greco, Fabrizio; Lonetti, Paolo

doi:10.1016/j.engstruct.2007.07.001

Cited by 37 publications

(27 citation statements)

References 15 publications

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“…De Miranda et al [29] and Como et al [30] proposed the earliest continuous model for the analysis of statical behavior of long-span cable-stayed bridges and, in the framework of the tangent Dischinger's approach, obtained closed-form solutions which a number of researchers (e.g., [31][32][33][34][35][36][37][38][39][40]) applied for dynamical and aeroelastic analysis of such structures.…”

Section: Downloaded By [University Of Guelph] At 15:20 19 November 2014mentioning

confidence: 99%

A Closed-Form Refined Model of the Cables' Nonlinear Response in Cable-Stayed Structures

Vairo

2009

Mechanics of Advanced Materials and Structures

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In this paper a refined second-order model for the analysis of the elastic response of cables in cable-stayed structures is proposed. Starting from the exact catenary theory, the Dischinger-Ernst formulation is rationally deduced and, performing a second order approximation both with respect to the stress variation and the apparent chord-strain one, a refined explicit equivalent constitutive relationship for elastic stays is obtained. Moreover, the geometrical non-linearities induced on the cable by the deformation of the stay-supported structure are taken into account through a second order displacement approach. Accordingly, a closed-form formulation describing nonlinear cable-structure interaction effects is obtained which, unlike the classical secant model, does not need iterative procedures, opening the possibility to develop refined analytical solutions for cable structures. Several numerical examples and benchmarks on different stay configurations are presented, showing the effectiveness and the accuracy of the proposed model.

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Section: Downloaded By [University Of Guelph] At 15:20 19 November 2014mentioning

confidence: 99%

A Closed-Form Refined Model of the Cables' Nonlinear Response in Cable-Stayed Structures

Vairo

2009

Mechanics of Advanced Materials and Structures

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“…In this study, two different load cases are considered: concentric and eccentric loads [40], as shown in Fig. 8.…”

Section: Concentric and Eccentric Load Casesmentioning

confidence: 99%

Dynamic behaviour of steel–concrete composite under-deck cable-stayed bridges under the action of moving loads

Madrazo-Aguirre

Ruiz-Teran

Wadee

2015

Engineering Structures

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“…Due to Eqs. (37)(38)(39), static instability can occur only when torsional bridge response appears (static torsional divergence).…”

Section: Aeroelastic Stability Of the Bridge: A Variationalmentioning

confidence: 99%

“…In detail, the nonlinear elastic behavior of a stay is herein modelled by means of an equivalent fictitious elastic modulus E * c , nonlinearly dependent on the stress level in the cable because of the geometrical sag effect. Accordingly, the along-the-chord stress variation σ induced in a single stay by live loads p acting upon the girder can be related to the corresponding along-the-chord strain variation ε by the fictitious constitutive relationship σ = E Assuming that stress increments in stays are proportional to the live loads p and that the bridge is characterized by a dominant truss behavior, stay and anchor stay cross-section areas (A c and A co ) are fixed through the cable design stresses σ g (assumed constant for all the stays) and σ go due to dead loads [30,38]:…”

Section: Appendix Amentioning

confidence: 99%

“…Referring to fan-shaped stay curtains, it is possible to show that some long-span cable-stayed bridge schemes with H -or A-shaped pylons exhibit an overall truss-like dynamic behavior [30][31][32][33][34][35][36][37][38][39], mainly affected by the first flexural and torsional modes. Accordingly, simplified dynamic models based on this truss assumption can be usefully employed for analyzing the aeroelastic stability of such a structure, as confirmed by many well-established researches [39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

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A Simple Analytical Approach to the Aeroelastic Stability Problem of Long-Span Cable-Stayed Bridges

Vairo

2010

International Journal for Computational Methods in Engineering

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This paper deals with the aeroelastic stability problem of longspan cable-stayed bridges under an approaching crosswind flow. Starting from a continuous model of the fan-shaped bridge scheme with both H-or A-shaped towers, critical states of the coupled wind-structure system are identified by means of a variational formulation, accounting for torsional and flexural (vertical and lateral) bridge oscillations. The overall bridge dynamics is described by introducing simple mechanical systems with equivalent stiffness properties and, under the assumption of a prevailing trusslike bridge behavior, analytical estimates for dominant stiffness contributions are proposed. Several case studies are discussed and comparisons with experimental evidences as well as with available analytical and numerical results are presented. The proposed simplified approach proves to be consistent and effective for successfully capturing the main wind-bridge interaction mechanisms, and it could be considered as a useful engineering tool for the aeroelastic stability analysis of long-span cable-stayed bridges.

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Dynamic impact analysis of long span cable-stayed bridges under moving loads

Cited by 37 publications

References 15 publications

A Closed-Form Refined Model of the Cables' Nonlinear Response in Cable-Stayed Structures

A Closed-Form Refined Model of the Cables' Nonlinear Response in Cable-Stayed Structures

Dynamic behaviour of steel–concrete composite under-deck cable-stayed bridges under the action of moving loads

A Simple Analytical Approach to the Aeroelastic Stability Problem of Long-Span Cable-Stayed Bridges

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