The Effects of Geometric Nonlinearity on Elasto-Plastic Analysis of Plane Steel Frames in Fire

Bing Xia; Yu Ching Wu

doi:10.4028/www.scientific.net/AMR.446-449.3513

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 446-449The Effects of Geometric Nonlinearity on...

The Effects of Geometric Nonlinearity on Elasto-Plastic Analysis of Plane Steel Frames in Fire

Abstract:

In this paper, the co-rotational total Lagrangian forms of finite element formulations are derived to make elasto-plastic analysis for plane steel frames either under increasing external loading at ambient temperature or under constant external loading at elevated temperatures. Geometric nonlinearity and thermal-expansion effect are taken into account. A series of programs are developed based on the formulations. To verify the accuracy and efficiency of the nonlinear finite element programs, a couple of numerical benchmark tests are carried out. And the results are in a good agreement with solutions from literature. The effects of nonlinear terms of the stiffness matrices on the computational results are investigated in detail. It is demonstrated that the influence of geometric nonlinearity on the incremental step by step finite element analysis for plane steel frames in fire is limited.

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Periodical:

Advanced Materials Research (Volumes 446-449)

Pages:

3513-3516

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.446-449.3513

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Online since:

January 2012

Authors:

Bing Xia, Yu Ching Wu

Keywords:

Analysis, Elasto-Plastic, Fire, Geometrically Nonlinear, Steel Frame

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