A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modal analysis of the post-buckling behaviour of cylindrical steel panels under compression: Imperfection sensitivity and local2 interaction
Abstract This paper presents and discusses numerical results on the (i) elastic post-buckling behaviour and (ii) imperfection sensitivity of simply supported cylindrical steel panels under uniform compression. The results presented are obtained by means of a geometrically non-linear Generalised Beam Theory (GBT) formulation previously reported by the authors, which can include arbitrary member initial geometrical imperfections. The modal decomposition features of GBT enables extending the knowledge on the mechanics underlying these structural elements, which cannot be obtained with standard shell finite element analysis. The work begins by describing the GBT buckling analysis of four curved panels with distinct curvatures. Then, post-buckling results are presented and discussed for each of the four panels geometries, by considering (i) two distinct critical-mode initial geometrical imperfections shapes and (ii) five distinct amplitudes to assess the imperfection sensitivity – if the “sign” of the initial geometrical imperfection is relevant, ten amplitudes are considered. These results provide the evolution, along the equilibrium paths, of relevant modal displacement profiles, modal participation diagrams and deformed configurations. For comparison and validation purposes, shell finite element results are also reported.
Highlights Elastic post-buckling behaviour of cylindrical steel panels under compression is investigated. Modal analysis assessment performed via Generalised Beam Theory (GBT). Sensitivity analysis on the geometrical imperfection (IGI) shape and amplitude is conducted. Local-local (local2) interactive buckling phenomenon is unveiled and explained. Detrimental influence from IGIs is observed in the panel's structural response (regardless of the curvature).
Modal analysis of the post-buckling behaviour of cylindrical steel panels under compression: Imperfection sensitivity and local2 interaction
Abstract This paper presents and discusses numerical results on the (i) elastic post-buckling behaviour and (ii) imperfection sensitivity of simply supported cylindrical steel panels under uniform compression. The results presented are obtained by means of a geometrically non-linear Generalised Beam Theory (GBT) formulation previously reported by the authors, which can include arbitrary member initial geometrical imperfections. The modal decomposition features of GBT enables extending the knowledge on the mechanics underlying these structural elements, which cannot be obtained with standard shell finite element analysis. The work begins by describing the GBT buckling analysis of four curved panels with distinct curvatures. Then, post-buckling results are presented and discussed for each of the four panels geometries, by considering (i) two distinct critical-mode initial geometrical imperfections shapes and (ii) five distinct amplitudes to assess the imperfection sensitivity – if the “sign” of the initial geometrical imperfection is relevant, ten amplitudes are considered. These results provide the evolution, along the equilibrium paths, of relevant modal displacement profiles, modal participation diagrams and deformed configurations. For comparison and validation purposes, shell finite element results are also reported.
Highlights Elastic post-buckling behaviour of cylindrical steel panels under compression is investigated. Modal analysis assessment performed via Generalised Beam Theory (GBT). Sensitivity analysis on the geometrical imperfection (IGI) shape and amplitude is conducted. Local-local (local2) interactive buckling phenomenon is unveiled and explained. Detrimental influence from IGIs is observed in the panel's structural response (regardless of the curvature).
Modal analysis of the post-buckling behaviour of cylindrical steel panels under compression: Imperfection sensitivity and local2 interaction
Martins, André Dias (author) / Silvestre, Nuno (author)
Thin-Walled Structures ; 144
2019-08-09
Article (Journal)
Electronic Resource
English
POST-BUCKLING BEHAVIOR, IMPERFECTION-SENSITIVITY AND MODE INTERACTION IN PITCHED-ROOF STEEL FRAMES
| British Library Conference Proceedings | 2002
Imperfection sensitivity of cylindrically curved steel panels
| Elsevier | 2014
Imperfection sensitivity of cylindrically curved steel panels
| Online Contents | 2015