@inproceedings{8e74dd68b42e4f708d165c8cd6962ca0,
title = "Effect of rotational stiffness at column base of portal frame at elevated temperature",
abstract = "In this paper, numerical models are developed to investigate the behavior of portal frames at elevated temperature. These simulation is able to capture the snap-through-buckling and the post-buckling behaviour. It is found that after buckling, the rafter takes the cantenary shape whose compressive stress is transformed into tensile stress and pulls the top of the column inward. A parametric study on the rotational stiffness of the column base is carried out. It is found that at a given lower rotational stiffness, the structure experiences snap-through at lower temperature; and increase of rotational stiffness provides stabilization of rafter and which yields a higher buckling temperature. Increasing the partial strength of column base increases the snap-through buckling temperature.",
keywords = "Dynamic analysis, Instability, Large-displacement, Non-linearity, Restabilization, Semi-rigidity, Snap-through-buckling",
author = "Mahbubur Rahman and Lim, {James B.P.} and Robert Hamilton and Tugrul Comlekci and David Pritchard and Yixiang Xu",
note = "Copyright: Copyright 2012 Elsevier B.V., All rights reserved.; 6th International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics, ICASS 2009 ; Conference date: 16-12-2009 Through 18-12-2009",
year = "2009",
language = "English",
isbn = "9789889914059",
series = "ICASS '09/IJSSD - Proceedings of Sixth International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics",
pages = "818--825",
booktitle = "ICASS '09/IJSSD - Proceedings of Sixth International Conference on Advances in Steel Structures and Progress in Structural Stability and Dynamics",
}