An analytical model for the behavior of I-shaped beam to cylindrical column connections at room temperature and high temperatures

Abstract

Purpose

In this paper, a closed-form analytical solution for the prediction of moment-rotation and the rotational stiffness-rotation curves of I-shaped beam to cylindrical column connections, commonly used on offshore platforms, at room and elevated temperatures, are presented.

Design/methodology/approach

An analytical solution for the prediction of moment-rotation and the rotational stiffness-rotation curves of I-shaped beam to cylindrical column connections is presented. The results of this model are compared with those of a non-linear coupled mechanical-thermal finite element model and small-scale experimental tests previously provided by the authors.

Findings

In this paper, a closed-form analytical solution for the prediction of moment-rotation and the rotational stiffness-rotation curves of I-shaped beam to cylindrical column connections, commonly used on offshore platforms, at room and elevated temperatures, is presented. The required yield and plastic moments in this model are provided as an extension to Roark's relationships. The results of this model are compared with those of a non-linear coupled mechanical-thermal finite element model and small-scale experimental tests previously provided by the authors. A reasonable agreement has been found between the analytical model results and the experimental/numerical modeling results.

Originality/value

This article is extracted from the author’s doctoral thesis, and all its achievements belong to the authors of the article.

Citation

Hosseini, S.A. and Zeinoddini, M. (2022), "An analytical model for the behavior of I-shaped beam to cylindrical column connections at room temperature and high temperatures", Journal of Structural Fire Engineering, Vol. 13 No. 1, pp. 1-31. https://doi.org/10.1108/JSFE-04-2021-0016