Lateral-torsional buckling resistance of cellular steel beams at room temperature and fire situation

Evaluation of the ultimate eccentric load of rectangular CFSTs using advanced neural network modeling

“…Fig. 9f shows the comparison between finite element models with a proposal developed by por Faria et al [41]. This model was the one that least underestimated the LTB resistance of steel cellular beams.…”

“…The equation developed by ANN is compared with the EC3 [13], AS 4100-1998 [14], Panedpojaman et al [15], EC3 [13] and Sonck [17], Taras and Greiner [16] with Sonck [17] and Faria et al [41] procedures, considering loads applied at shear center. It is important to highlight that of the 768 models that were selected for the application of the ANN, 458 models were subjected to loading applied at shear centre.…”

“…ANN vs. EC3 [13] (b) ANN vs. AS 4100-1998 [14] (c) ANN vs. Panedpojaman et al [15] (d) ANN vs. EC3 [13] and Sonck [17] 0 EC3 [15] and Sonck [19] ANN (e) ANN vs. Taras and Greiner [16] with Sonck [17] (f) ANN vs. Faria et al [41] Fig. 9: Loads applied at shear centre According to Fig.…”

“…In this section, the studies, that were developed to investigate the LTB of steel cellular beams, will be presented. In this context, few experimental studies [17,[31][32][33] and many numerical studies based on the finite element method [1,2,[35][36][37][38][39][40][41]3,15,24,26,[31][32][33][34] were published.…”

“…However, for cellular steel beams with yield strengths of 350MPa and 450MPa, this comparison was unconservative. Recently, Faria et al [41] investigated the LTB resistance in fire situations by performing finite element analyses. The authors presented a procedure to predict the LTB resistance of cellular steel beams, considering fire and room ambient temperature (Eq.…”