%0 Journal Article
%T Reliability of Single-Layer Steel Space Domes under the Effects of the Changes in the Height-to-Span Ratio
%J AUT Journal of Civil Engineering
%I Amirkabir University of Technology
%Z 2588-2899
%A Bahrpeymah, Abdolhamid
%A Layegh Rafat, mahmood
%A shabakhty, naser
%D 2022
%\ 03/01/2022
%V 6
%N 1
%P 3-14
%! Reliability of Single-Layer Steel Space Domes under the Effects of the Changes in the Height-to-Span Ratio
%K Reliability Index
%K Sensitivity
%K Correlation
%K performance function
%K height-to-span ratio
%R 10.22060/ajce.2022.19547.5740
%X In space domes, geometrical changes are the main factors that determine the forces in the structural members. This paper has addressed the effects of the height-to-span ratio variations on the reliability of space domes. Applied loads, nodes coordinates, memberâ€™s cross-section, modulus of elasticity, and yield stress are the random variables, and FORM (first-order reliability method), SORM (second-order reliability method), MCS (Monte Carlo sampling) and IS (importance sampling) were the methods used to evaluate the reliability of such structures. Results showed that FORM yielded better solutions; reliability increased with an increase in the height-to-span ratio, and a change in the performance function changed the reliability index and sensitivity coefficient. Hence, for domes with height-to-span ratios less than 0.3, the displacement performance function is the effective function and for ratios greater than 0.3, the stress performance function should be considered as the critical function.
%U https://ajce.aut.ac.ir/article_4924_92b7fa8c9da808123aecbfb71715d640.pdf