8/18/2019 corrugated web beams

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TABLE I. CALCULATION SEQUENCE ACCORDING TO BOTH METHODOLOGIES

Eurocode 3’s current methodology 

for Class 4 cross-sections

(EN 1993-1-2)

“New proposal” 

for Class 3 and 4 cross-sections

(Couto, 2015)

Effective cross-sectional properties

 ̅ =  ⁄28.4√ 

 

 ̅

 =  ⁄28.4√ 

 

 =  ̅ − 0.188 ̅   1 with  ̅,  0.748 

 =  ̅ + 1.1− 0.52 . −0.188

 ̅ + 1.1− 0.52 .  1 

 =  ̅ − 0.0553 +  ̅   1 with  ̅,  0.5+ √ 0.085−0.055 

 =  ̅ + 0.9 − 0.26 . − 0.0553 +

 ̅ + 0.9 − 0.26   1 

, = [2() + ( − 2)]  , = [2() + ( − 2)] 

 , = , 

 ,

 = ,

  

,, = ,(ℎ + )  ,,   = , (ℎ + ) ,, = ,,.,    (1a) ,,   = ,, y,   (1b)Resistance to lateral-torsional buckling (LTB)

 ̅,  =  ,,  ., ,   ̅, =  

,,  y,, 

= 0.65  with   = 0.85   = {1.25⏟>.; 1.00⏟.