Kamiński, M.Błoński, R.2021-11-242021-11-242021Kamiński M., Błoński R., Analytical and Numerical Reliability Analysis of the Pratt Steel Truss. W: XXVII LSCE 2021 : Lightweight Structures in Civil Engineering. Contemporary problems. Book of Abstracts, Szafran J. (Ed.), Kamiński M. (Ed.), Wydawnictwo Politechniki Łódzkiej, Łódź 2021, s. 69-72, ISBN 978-83-66741-15-7.978-83-66741-15-7http://hdl.handle.net/11652/4106The main aim of this paper was to investigate a variation of the reliability index β for some steel truss girder depending with respect to its length and to check the differences in numerical results obtained with the use of numerical and analytical probabilistic calculations. Some small Pratt truss, which includes vertical members and diagonals that slope down towards its centre was selected to make such a comparison. The span of this truss has been adopted as the Gaussian input variable in this study, which is motivated by in situ observations and measurements statistics as well as by its nonlinear impact on the Serviceability Limit State. The basic probabilistic characteristics of the structural response have been determined using the 10th-order Iterative Generalized Stochastic Perturbation Method and using Monte-Carlo Simulation also. The very important aspects in this work are (i) a contrast of analytical and numerical results and (ii) stochastic analysis of the load capacity in this truss joints, i.e. the stresses in the welds. Numerical results presented here have been obtained by the Finite Element Method system Robot Structural Analysis Professional 2021 and also via symbolic computer algebra environment MAPLE.enFair use conditionDla wszystkich w zakresie dozwolonego użytkureliability indexstochastic perturbation methodMonte-Carlo simulationfinite element methodtruss girderdeflectionwskaźnik niezawodnościmetoda perturbacji stochastycznychsymulacja Monte-Carlometoda elementów skończonychdźwigar kratownicowyugięcieAbstractLUT LicenseLicencja PŁ