Transformation of Buckling Shapes Obtained from Shell Finite Elements in GBT (Generalized Beam Theory) Modes

Marcelo J Bianco
2018 Civil Engineering Research Journal  
This study presents the procedure in the transformation of the displacement fields obtained from shell finite elements into Generalized Beam Theory (GBT) modes. Such transformation is useful for geometrically linear buckling analysis, especially if one desires to convert a generic critical buckling shape, typically obtained in shell finite element analysis, into orthogonal deformation mode shapes, which is the main feature of GBT. Therefore, it is possible to reach a buckling modal
more » ... n: global, distortional and local, which is re-quired in Eurocode 3 to reach the amplitude of initial equivalent imperfections. A special attention is attributed to the matrix transformation between shell and GBT models, which is developed based on GBT kinematic as-assumptions. Finally, a detailed example of a thin-walled hollow circular cross-section is presented to clarify the present approach.
doi:10.19080/cerj.2018.06.555690 fatcat:nrrxcri4bzeu7puk7blgqvmgri