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Träfflista för sökning "L773:0167 4730 OR L773:1879 3355 srt2:(2010-2014)"

Sökning: L773:0167 4730 OR L773:1879 3355 > (2010-2014)

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1.
  • Honfi, Daniel (författare)
  • Serviceability floor loads
  • 2014
  • Ingår i: Structural Safety. - : Elsevier BV. - 0167-4730. ; 50, s. 27-38
  • Tidskriftsartikel (refereegranskat)abstract
    • Serviceability of structures has to be verified for a lower load level than the design load used for safety considerations. Representative values of actions used in serviceability load combinations are often defined in a way that the fraction of time spent above a given load level should be limited to a certain value. To determine these load levels more information on the stochastic nature of the loading process is needed than to estimate the design load. A convenient way in structural design codes is to express representative values (rare, frequent and quasi-permanent) as a fraction of the characteristic value by using load reduction factors. However, the characteristic value is usually defined in a different way i.e. with a certain probability of not being exceeded (in a chosen period of time). The current paper estimates representative values of floor live loads by numerical simulation using stochastic live load models with a special focus on serviceability. The results are compared to values given in existing standards (Eurocode on first place). Improvements are suggested concerning the load reduction factors, the definitions of the representative values and the stochastic load parameters. (C) 2014 Elsevier Ltd. All rights reserved.
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2.
  • Sanchez Heres, Luis Felipe, 1984, et al. (författare)
  • Influence of mechanical and probabilistic models on the reliability estimates of fibre-reinforced cross-ply laminates
  • 2014
  • Ingår i: Structural Safety. - : Elsevier BV. - 0167-4730. ; 51:1, s. 35-46
  • Tidskriftsartikel (refereegranskat)abstract
    • Numerous methodologies for estimating the reliability of fibre-reinforced plastics have been published in the past few decades. Several of these methodologies use different mechanical and probabilistic models, each one based on a number of assumptions and approximations. The objective of this study is to assess common assumptions and approximations made on mechanical and probabilistic models used in reliability analyses of fibre-reinforced plastic laminates. The assessment consists of two parts: a theoretical overview of the models and their justification, and an investigation of the quantitative influence of the models on the reliability estimates of a group of fibre-reinforced cross-ply laminates. The reliability estimates are calculated through Monte Carlo simulations using different mechanical and probabilistic models. This study concludes that both mechanical and probabilistic models can significantly influence the reliability estimations. For the mechanical models, the factor with the greatest influence is the definition and modelling of matrix cracking. While, for the probabilistic models, the choice of probability distribution for modelling ply property variability has the greatest influence.
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  • Resultat 1-2 av 2
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refereegranskat (2)
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Ringsberg, Jonas, 19 ... (1)
Honfi, Daniel (1)
Johnson, Erland, 196 ... (1)
Sanchez Heres, Luis ... (1)
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