Passarela estaiada com tabuleiro de madeira laminada protendida em módulos curvos

Pletz, Everaldo

doi:10.11606/t.18.2016.tde-01062016-121237

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Therefore, it is undeniable developing technologies importance for rational wood use, either in structures covers or as transportation problems solution in our cities, mainly because of world urbanization growing process [1].…”

Section: Introductionmentioning

confidence: 99%

Alternative Woods in Framework Arc for Pedestrian Footbridge

Garcia¹,

Leão²,

Pinheiro³

et al. 2017

ijme

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Uncontrolled and equivocal uses of well-known structural wood species have influenced shortage of these products on market of structural design. In order to raise awareness of the professionals of building construction about "alternative" wood species, a proposal is here discussed by employing these essences in footbridges. A case study is considered: a hyperestatic trussed arc with intermediate deck, parameters chosen based on local features of structure implementation. This project aims to reduce pressure on traditional species, evidencing "alternative" woods technical capacity, and improve accessibility in crossings over city streets. To provide greater durability to structure life, preservative treatment type has been set. Finally, by results, that it is possible to apply mean strength wood in large structures, requiring only right combination between structural staticity and wood properties.

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Section: Introductionmentioning

confidence: 99%

Alternative Woods in Framework Arc for Pedestrian Footbridge

Garcia¹,

Leão²,

Pinheiro³

et al. 2017

ijme

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“…The knowledge of the moment of inertia and elasticity modulus is essential in planning a plate [3]. In the particular case of wood laminated plates, characterized by the variability of the geometrical and physical characteristics of the material it is imperative studying its effects on those quantities.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Variability of the Flexural Rigidity in Pre-stressed Laminated Wood Plates

Pletz¹,

Arroyo²,

Almeida³

et al. 2017

ijme

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Although geometrical data describing structures are generally represented by their nominal values, practice has revealed that this is not the more appropriate for prestressed laminated wood plates, once the lamellae present significant size variability. The importance of this variability increases when it affects the height of plate cross sections, they also affect their moments of inertia which depends on the value of the height raised to the third power. Preliminary studies showed standard deviations of almost 10%. As far as stress-laminated plates are regarded, the variability of dimensions along the length of the length of the pieces introduces a new source of variability for the cross section moment of inertia. The obtained surfaces aren't completely flat, presenting variability due the size variability along the length of the pieces. Consequently, the moment of inertia of the cross section of a stress-laminated plate is not obtained by summing up the individual moment of inertia of each piece. On the other hand, modulus of elasticity also presents a strong variability not only among the height of pieces, but also along their length. Preliminary experiments reveal a standard deviation of 23% for plates from Pinus taeda. The variability of moment of inertia of pieces and of the plate itself was determined, as well as the variability of the modulus of elasticity. The results show that rigidity just can be estimated probabilistically; that softwoods are suited for system of high redundancy; that the calculation of deformations and stress distribution along the structures are dependent on this variability and thus the referred calculations are nothing more than estimations with a certain level of confidence to be established according to the control procedures adopted; and finally that further research must be developed on probabilistic numerical factors to be incorporated to the calculation expressions of rigidity of the cross section of stress-laminated plates.

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“…A passarela, depois de concluída, foi exposta a uma série de ensaios estáticos e dinâmicos (PLETZ, 2003 • Determinação das freqüências vertical e transversal do tabuleiro com o acelerômetro;…”

Section: Ix12 -Ensaios Preliminaresunclassified

O uso do GPS como instrumento de controle de deslocamentos dinâmicos de obras civis - aplicação na área de transportes

Larocca¹

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Passarela estaiada com tabuleiro de madeira laminada protendida em módulos curvos

Cited by 5 publications

References 3 publications

Alternative Woods in Framework Arc for Pedestrian Footbridge

Alternative Woods in Framework Arc for Pedestrian Footbridge

Analyzing the Variability of the Flexural Rigidity in Pre-stressed Laminated Wood Plates

O uso do GPS como instrumento de controle de deslocamentos dinâmicos de obras civis - aplicação na área de transportes

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