Steel Buildings in Europe

Title Appendix A Worked Example: Wind action on a multi-storey building 9 of 18 3 - 30 16 Aerodynamic admittance functions Function R h :   h 2 2 h h h h 1 2 ( ) 1 1         e R   2,87 6,09 75,9 4,6 35 , ( ) 4,6 L s 1,x s h      f z n L z h  Then, we obtain: R h (  h ) = 0,15 EN 1991-1-4 § B.2(6) Function R b :   b 2 2 b b b b 1 2 ( ) 1 1         e R   2,87 20,9 75,9 4,6 120 , ( ) 4,6 L s 1,x s b      f z n L z b  Then, we obtain: R b (  b ) = 0,046 EN 1991-1-4 § B.2(6) 17 Resonance response factor 2 R   b h L s 1,x 2 , 2 S z n R R      =  2 × 0,0664 × 0,15 × 0,046 / (2 × 0,076) = 0,0297 EN 1991-1-4 § B.2(6) 18 Peak factor 2 2 2 1,x B R n R    0,415 0,0297 0,0297 0,9    = 0,23 Hz (> 0,08 Hz) T) 2 ln( 0,6 T) 2 ln( p       k T = 600 s Then: 3,33 600) 2 ln(0,23 0,6 600) 2 ln(0,23 p        k EN 1991-1-4 § B.2(3) 19 Structural coefficient for wind on the long side 0,773 1 7 0,235 0,0297 0,415 0,235 1 2 3,33 s d          c c