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Efficacy of a New Geometric Stiffness Matrix for Buckling Load Analyses
Barry T. Rosson
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DOI:10.17265/1934-7359/2025.01.003
Department of Civil, Environmental and Geomatics Engineering, Florida Atlantic University, Boca Raton, FL 33431, USA
This paper investigates the development and performance of a new higher-order geometric stiffness matrix that more closely approximates the theoretically derived stiffness coefficients. Factors that influence the accuracy of the solution are studied using two columns, two braced frames, and one unbraced frame. Discussion is provided when the new geometric stiffness matrix can be used to improve the buckling load analysis results and when it may provide only nominal additional benefit.
Geometric stiffness matrix, buckling load, stability functions, structural frame.
Journal of Civil Engineering and Architecture 19 (2025) 22-26
doi: 10.17265/1934-7359/2025.01.003
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