Step III: Estimate the concentrated live loads acting on the columns of frame which are bi-ei-hi, produced by the live load distribution on the beams of the orthogonal frames , di-ei-fi , ai-bi-ci and gi-hi-ii (0.60x50x25)/1000=0.75k/ft. d6 e6 28.125 k f6 f3 d5 e5 Resultant 28.125 k 28.125 k f2 d4 e4 28.125 k f5 d3 e3 12.5’ 25’ 12.5’ 28.125 k 14.0625 k f4 d2 e2 14.0625 k 12.5’ d1 e1 f1 14.0625 k 25’ 12.5’ 14.0625 k 0.74x50 x12.5=0.46k/ft a6 b6 17.34 k c6 a5 c5 c3 b5 17.34 k a4 17.34 k 4 c4 12.5’ 25’ 12.5’ 8.67 k 8. 67 k a3 b3 c1 Resultant 17.34 k 12.5’ a2 b2 8.67 k a 25’ 12.5’ b1 c2 8.67 k 17.34 k x12.5=0.46k/ft Thus, the concentrated live loads acting on columns and are 17.34 kips bi hi The concentrated live loads acting on columns are 28.125 k ei
Step III: Estimate the concentrated live loads acting on the columns of frame bi-ei-hi, which are produced by the live load distribution on the beams of the orthogonal frames di-ei-fi , ai-bi-ci , and gi-hi-ii d6 e6 28.125 k (0.60x50x25)/1000=0.75k/ft. f6 d5 e5 d4 e4 d3 e3 d2 e2 28.125 k 28.125 k 28.125 k Resultant 28.125 k f5 12.5’ f4 14.0625 k f3 f2 25’ 12.5’ 14.0625 k d1 e1 f1 12.5’ 14.0625 k 25’ 12.5’ 14.0625 k a6 b6 17.34 k a5 0.74x50 x12.5=0.46k/ft c6 c5 b5 17.34 k a4 4 17.34 k a3 c4 12.5’ 8.67 k c3 25’ 12.5’ 8. 67 k b3 a2 b2 a b1 17.34 k Resultant 17.34 k c2 c1 12.5’ 8.67 k x12.5=0.46k/ft 25’ 12.5’ 8.67 k Thus, the concentrated live loads acting on columns bi and hi are 17.34 kips The concentrated live loads acting on columns ei are 28.125 k
CE470Ch1_Introduction.docx