Estudo de efeitos dinâmicos de pontes ferroviárias considerando interação veículo-estrutura.

Melo, Ticona; Roger, Ladislao

doi:10.11606/t.3.2016.tde-02122016-100030

Cited by 2 publications

(6 citation statements)

References 33 publications

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“…The interaction between the dynamic system of multi-body vehicles and the bridge structure produces random vibrations that depend on the type of vehicles, on the stiffness, damping and inertia properties of the bridge and on the surface condition of the pavement. The passage of the vehicle over the bridge causes some vibrations in the structure that are enhanced due to irregularities in the pavement (Melo, 2007; Carneiro, 1986; Rossigali, 2013).…”

Section: Runway Surface Irregularitymentioning

confidence: 99%

“…The parameter α‾ is the spectral coefficient of roughness. It depends on the pavement conservation state, which can be classified into five categories by the International Organization for Standardization (ISO), see Table 1 (Melo, 2007). The β exponent depends on the pavement material, usually 2.03 for asphalt and 1.85 for concrete pavements.…”

Section: Runway Surface Irregularitymentioning

confidence: 99%

“…Honda et al (1982) discussed the roughness of the pavement and presented a spectrum of surface roughness as a function of the conservation state of the highway. Their model was also applied by Carneiro (1986) and Melo (2007) with good results.…”

Section: Introductionmentioning

confidence: 99%

“…The bridge structure is modeled by standard Finite Element Method applying the Euler–Bernoulli theory for 1D beam elements. Transient analysis is undertaken in the sense to evaluate dynamic effects due to movement of each vehicle over the bridge and potentiated by random irregularities on the pavement (Melo, 2007). A straight 20 meters single supported beam is analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic analysis of a highway bridge beam under the passage of compound heavy trucks with multiple trailers

Metz,

Machado,

Arndt

et al. 2023

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PurposeRealistic composite vehicles with 2, 3, 5 and 9 axles, consisting of a truck with one or two trailers, are addressed in this paper by computational models for vehicle–bridge interaction analysis.Design/methodology/approachThe vehicle–bridge interaction (VBI) models are formed by sets of 2-D rigid blocks interconnected by mass, damping and stiffness elements to simulate their suspension system. The passage of the vehicles is performed at different speeds. Several rolling surface profiles are admitted, considering the maintenance grade of the pavement. The spectral density functions are generated from an experimental database to form the longitudinal surface irregularity profiles. A computational code written in Phyton based on the finite element method was developed considering the Euler–Bernoulli beam model.FindingsSeveral models of composite heavy vehicles are presented as manufactured and currently travel on major roads. Dynamic amplification factors are presented for each type of composite vehicle.Research limitations/implicationsThe VBI models for compound heavy vehicles are 2-D.Social implicationsThis work contributes to improving the safety and lifetime of the bridges, as well as the stability and comfort of the vehicles when passing over a bridge.Originality/valueThe structural response of the bridge is affected by the type and size of the compound vehicles, their speed and the conservative grade of the pavement. Moreover, one axle produces vibrations that can be superposed by the vibrations of the other axles. This effect can generate not usual dynamic responses.

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Section: Runway Surface Irregularitymentioning

confidence: 99%

Section: Runway Surface Irregularitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamic analysis of a highway bridge beam under the passage of compound heavy trucks with multiple trailers

Metz,

Machado,

Arndt

et al. 2023

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“…The structural mass was calibrated in order the main natural frequencies being close to available data in the literature [30], seeking to approximate the idealized structure of a practical case. The stiffness was determined for the described simple supported beam considering the defined cross section, although it should be noted that the out of plane degrees of freedom were also restrained in order to eliminate purely local modes, without contributions to the global dynamic behavior, and whose existence is only possible due to the absence of transverse bracing.…”

Section: Dynamic Analysis Assumptionsmentioning

confidence: 99%

Application of the modal superposition technique combined with analytical elastoplastic approaches to assess the fatigue crack initiation on structural components

Horas

Correia

Jesus

et al. 2017

Engineering Fracture Mechanics

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Local fatigue approaches, such as, the stress-life, strain-life or energetic approaches defines a framework to estimate the fatigue crack initiation from notches of structural details. Various engineering structures, such as, bridges, wind towers, among others, are subjected to cyclic dynamic loadings which may substantially reduce the strength of these structures. Nowadays, the structural systems tend to be more complex being necessary to find computationally efficient solutions to perform their fatigue analysis, accounting for dynamic actions corresponding to long complex loading events (e.g. diversity of trains crossing a bridge), mainly if local approaches are envisaged. Thus, this paper aims at presenting and validating a generalization of a methodology based on modal superposition technique, for fatigue damage parameters evaluation, which can be applied in fatigue analysis using local approaches. This technique was applied recently in the context of fatigue crack propagation based on fracture mechanics, although it can be extended to compute the history of local notch stresses and strains at notches. A very important conclusion is that the technique can be explored for the case of local confined plasticity at notches whenever the global elastic behaviour of the component prevails. Local submodelling can be explored with this technique to avoid the necessity of large computational models. Local models are only needed to be run under linear elastic conditions for the selected modal shapes of the structure, being the local time history of fatigue damage variable computed by modal superposition for each loading event.That time history may be further post-processed for elastoplastic conditions using Neuber or Glinka's analyses. Comparisons with direct integration elastoplastic dynamic analysis confirmed the feasibility of the proposed approach.

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Estudo de efeitos dinâmicos de pontes ferroviárias considerando interação veículo-estrutura.

Cited by 2 publications

References 33 publications

Dynamic analysis of a highway bridge beam under the passage of compound heavy trucks with multiple trailers

Dynamic analysis of a highway bridge beam under the passage of compound heavy trucks with multiple trailers

Application of the modal superposition technique combined with analytical elastoplastic approaches to assess the fatigue crack initiation on structural components

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