Unformatted text preview: CHAPTER 1 Tension, Compression, and Shear L P A B C θ Solution 1.815 Two bars supporting a load P T 5 tensile force in bar AC C 5 compressive force in bar BC A REAS OF BARS L ENGTHS OF BARS L AC 5 L cos u Ê L BC 5 L A BC 5 C s allow 5 C s allow tan u A AC 5 T s allow 5 P s allow sin u © F horiz 5 Ê C 5 P tan u © F vert 5 Ê T 5 P sin u W EIGHT OF TRUSS g 5 weight density of material W 5 g ( A AC L AC 1 A BC L BC ) Eq. (1) g , P , L , and s allow are constants W varies only with u Let Eq. (2) G RAPH OF E Q . (2): W k 5 1 1 cos 2 u sin u cos u (Nondimensional) k 5 g PL s allow ( k has units of force) 5 g PL s allow ¢ 1 1 cos 2 u sin u cos u ≤ 5 g PL s allow ¢ 1 sin u cos u 1 1 tan u ≤ L P A B C P T C C Joint C 3 6 9 12 30 ° 60 ° 90 ° u W k APDF Split DEMO : Purchase from www.APDF.com to remove the watermark...
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 Spring '08
 Armanios
 Force, 60°, 9 K, sallow sin, 6 3 0 30°, 15 Two bars

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