c599214c-c673-41c8-b8ac-57a8e13f69b820230724065157342naun:naunmdt@crossref.orgMDT DepositInternational Journal of Mechanics1998-444810.46300/9104http://www.naun.org/cms.action?id=28283320233320231710.46300/9104.2023.17https://npublications.com/journals/mechanics/2023.phpModelling Initial Geometric Imperfections of Steel Plane Frames Using Entropy and EigenmodesZdeněkKalaInstitute of Structural Mechanics, Faculty of Civil Engineering, Brno University of Technology, Veveří Str. 95, Brno, ZIP 602 00, Czech RepublicThe article introduces an innovative approach to modelling initial geometric imperfections in steel plane frames. Initial imperfections are introduced using the analysis of normalised deformations of elastic buckling modes. The scale of these modes is assessed by applying Shannon entropy and potential energy analysis. The presented case study demonstrates a decreasing scale of the elastic buckling modes. 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