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Influence of statistical size effect in steel on structural safety

  • This paper present the investigation of the statistical size effect in steel structure and the corresponding reliability. This study described the randomness of material properties through two different ways. These two proposed simulation methods, which are an extension and supplement to traditional simulation methods, can effectively simulate the statistical size effect for the tensile and flexural components in steel structures. The test results show that the variations of the yield and tensile strength increase with the decreasing specimen volume. Besides, the structural component strength is not only related to the specimen volume, but also the stress distribution. It is found by studying the influence of statistical size effect on structural reliability that the strength, which is obtained by small specimens through statistical analysis in the laboratory, is no more accurately applicable to large construction. The core idea is that the stochastic material proper-ties are directly embedded in mechanical calculations to develop aThis paper present the investigation of the statistical size effect in steel structure and the corresponding reliability. This study described the randomness of material properties through two different ways. These two proposed simulation methods, which are an extension and supplement to traditional simulation methods, can effectively simulate the statistical size effect for the tensile and flexural components in steel structures. The test results show that the variations of the yield and tensile strength increase with the decreasing specimen volume. Besides, the structural component strength is not only related to the specimen volume, but also the stress distribution. It is found by studying the influence of statistical size effect on structural reliability that the strength, which is obtained by small specimens through statistical analysis in the laboratory, is no more accurately applicable to large construction. The core idea is that the stochastic material proper-ties are directly embedded in mechanical calculations to develop a more accurate and economical design method for steel structure.show moreshow less

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Metadaten
Author: Zheng Li, Hartmut PasternakORCiD, Doncho Partov
URL:http://www.newtrends.sk/dokumenty/proceedings_2018.pdf
ISBN:978-80-227-4845-2
Title of the source (English):Proceedings of 16th International Conference on New Trends in Statics and Dynamics of Buildings
Publisher:Slovak University of Technology
Place of publication:Bratislava
Editor: Norbert Jendželovský, Alžbeta Grmanová
Document Type:Conference Proceeding
Language:English
Year of publication:2018
Tag:Statistical size effect; Steel structure; Stochastic FEM; Stochastic material model; Structural safety
Faculty/Chair:Fakultät 6 Architektur, Bauingenieurwesen und Stadtplanung / FG Stahl- und Holzbau
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