Year 2023

• Reliability estimation of underground horizontal fuel tank limit states

  Publication

  • P. Sorn
  • M. Sondej
  • J. Górski

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Year 2023

  Fuel tanks are designed with regard to standard loads and operating conditions. The investigations of the paper show the impact of such factors as tank corrosion and other means on the variation of stress fields and deformation of the underground horizontal tank shell. The introduction of probabilistic methods allows for structural reliability assessment. While the computational time of the entire tank FEM model is high, the preliminary...

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Year 2022

• SIMPLIFIED MODELING OF STRESS AND DEFLECTION LIMIT STATES OF UNDERGROUND TANKS

  Publication

  • P. Sorn
  • M. Sondej
  • J. Górski

  - Year 2022

  Fuel tanks are designed with regard to standard actions and operating conditions. The work analyses the impact of corrosion and other means to variation of stresses and deformation of a horizontal underground tank shell. The computations are preliminary. Due to the long computational time of the entire tank the analysis is restricted to its part only. The full analysis is bound to assess structural reliability, further allowing...

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Year 2020

• Modelowanie losowych imperfekcji geometrycznych przestrzennych konstrukcji metalowych

  Publication

  • J. Górski
  • T. Mikulski
  • M. Oziębło
  • P. Sorn
  • K. Winkelmann

  - Inżynieria i Budownictwo - Year 2020

  Imperfekcje geometryczne zbiorników, silosów i powłok siatkowych mogą znaczą-co wpłynąć na ich nośność, a więc powinny być one uwzględniane w obliczeniach komputerowych i w procesie projektowania. Wykazano, że przy podstawowych obcią-żeniach, działających na tego typu konstrukcje, tj. podciśnieniu oraz naporu wiatru i śniegu (w przypadku powłok siatkowych), wykazują wyraźne różnice w porównaniu z analogicznymi wynikami dla tych...

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Year 2016

• Discrete random variables in reliability calculations of a reticulated shell

  Publication

  • P. Sorn
  • J. Górski
  • K. Winkelmann
  • J. Przewłócki

  - Year 2016

  Implementation of the Point Estimation Method (PEM) in the reliability analysis of a three-dimensional truss structure is presented in the paper. The influence of geometric and material random parameters on the truss load-carrying capacity was investigated. The analysis was performed for different combinations of basic variables. Symmetric and asymmetric cases of snow load were taken to assess the structural reliability. Sensitivity...

Year 2015

• PROBABILISTIC ANALYSIS OF A SPACE TRUSS BY MEANS OF A MULTIDIMENSIONAL VARIABLE DESCRIPTION

  Publication

  • P. Sorn
  • J. Górski
  • J. Przewłócki

  - Archives of Civil Engineering - Year 2015

  The objective of this paper is to present a variant of the point estimate method (PEM) to determine mean values and standard deviations of limit loads of engineering structures. This approach is illustrated by limit state analysis of a space truss, considering geometric and material imperfections. The calculations were performed for different random models, so the influence of random parameters on the limit load of the truss can...

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Year 2014

• Safety of erection and repair of steel tanks with geometric imperfections using heavylift jack-up system

  Publication

  • J. Górski
  • T. Mikulski
  • P. Sorn

  - Year 2014

  Safety analysis is performed of cylindrical vertical steel tanks during erection using heavylift jack up system. During an assembly or repair process a set of hydraulic supports is used. It allows to use the in-place lifting of heavy steel constructions on the required height. Wind can strongly influence stability of the lifted tank. Any geometric imperfections can reduce the critical or limit load. In the work failures of the...

Year 2013

• The point estimate method in a reticulated shell reliability analysis

  Publication

  • J. Przewłócki
  • J. Górski
  • P. Sorn

  - Year 2013

  The objective of this paper is to present an application of the point estimate method (PEM) that can determine the probabilistic moments for engineering structures. The method is reasonably robust and adequately accurate for a wide range of practical problems. It is a special case of numerical quadrature based on orthogonal polynomials. The main advantage of this method is that, unlike FORM or SORM, it is not necessary to carry...

• The Point Estimate Method in a Reticulated Shell Reliability Analysis

  Publication

  • J. Przewłócki
  • J. Górski
  • P. Sorn

  - Year 2013

  The objective of this paper is to present an application of the point estimate method (PEM) to determine the probabilistic moments for engineering structures. Reliability analysis is illustrated by two examples: an estimation of the critical force in linear elastic buckling analysis and a reticulated shell limit load determinations. Calculations were also made using Monte Carlo method. It has been shown the practical usefulness...