Steel Buildings in Europe

Title APPENDIX D Worked Example: Design of portal frame using elastic analysis 24 of 44 4 - 105 V Ed  118 kN (maximum value) N Ed  127 kN (maximum value) M Ed  356 kNm (maximum value) Section properties 450  h mm 9880  A mm 2 190  b mm 3 pl,y 10 1702   W mm 3 9, 4 w  t mm 4 y 10 33740   I mm 4 185 y  i mm 14,6 f  t mm 4 z 10 1676   I mm 4 41, 2 z  i mm 21  r mm 4 t 66,9 10   I mm 4 420,8 w  h mm 9 w 791 10   I mm 6 378,8  d mm 7.7. Cross-section classification 7.7.1. The web w t c = 9, 4 378,8 = 40,3 EN 1993-1-1 Table 5.2 (Sheet 1) d N = w y Ed t f N = 9, 4 355 127000  = 38  = w w N 2 d d d  = 2 378,8 378,8 38   = 0,55 > 0,50 The limit for Class 1 is : 13 1 396    = 13 0,55 1 396 0,81    = 52,1 Then : w t c = 40,3 < 52,1  The web is class 1. 7.7.2. The flange f t c = 14, 6 69,3 = 4,7 The limit for Class 1 is : 9 ε = 9  0,81 = 7,3 Then : f t c = 4,7 < 7,3  The flange is Class 1 EN 1993-1-1 Table 5.2 (Sheet 2) Therefore, the section is Class 1. The verification of the member will be based on the plastic resistance of the cross-section.