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Effect of rotational stiffness at column base of portal frame at elevated temperature

Xu, Yixiang (2010) Effect of rotational stiffness at column base of portal frame at elevated temperature. In: Sixth International Conference on Advances in Steel Structures 2009, 2009-12-16 - 2009-12-18, Hong Kong, China.

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Abstract

In this paper, numerical models are developed to predict the true behavior of portal frames at elevated temperature. These models are fully capable of capturing 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 conducted. It was found that at a 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.

Item type: Conference or Workshop Item (Paper)
ID code: 16212
Keywords: rotational stiffness, portal frame, elevated temperature, steel structures, Engineering (General). Civil engineering (General)
Subjects: Technology > Engineering (General). Civil engineering (General)
Department: Faculty of Engineering > Civil and Environmental Engineering
Related URLs:
Depositing user: Dr Yixiang Xu
Date Deposited: 10 Feb 2010 12:57
Last modified: 04 Oct 2012 17:35
URI: http://strathprints.strath.ac.uk/id/eprint/16212

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