چكيده به لاتين
In order to investigate the effects of aspect ratio, curvature and slenderness on the shear behavior of flat and curved plates in fire conditions, a parametric study is conducted. The simulation were performed by ABAQUS software. Also For verification of the out-coming numerical results, EN and AASHTO standard were used. Comparison of the results of the finite element method elastic buckling analysis with the corrected theoretical relationship according to EN.1993, showed that in the aspect ratio 1, for all values of the slenderness parameter, the rules of the regulation lead to non-conservative results, while in the aspect ratio 2, the rules of the regulation lead to conservative results.
The numerical results of the ultimate shear strength of the plates up to 400 ° C showed that the non-compact plates are more sensitive to temperature changes, which increases the sensitivity by increasing the aspect ratio.
The study also suggested that increasing the temperature to around 700 ℃ for thin plates could reduce the ultimate shear strength of the plates about 88% relative to the ambient temperature, which would reach about 77% with the thickness of the plates.
