Tasks: Problem 1a -Stiffness Method Total = 50 = 0.25 a fi 0.5 11 aft 2 P 2P 2 P 6 @ LA6L P= 18.5kips Top chords AISC sh

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Tasks Problem 1a Stiffness Method Total 50 0 25 A Fi 0 5 11 Aft 2 P 2p 2 P 6 La6l P 18 5kips Top Chords Aisc Sh 1 (47.78 KiB) Viewed 34 times

Tasks: Problem 1a -Stiffness Method Total = 50 = 0.25 a fi 0.5 11 aft 2 P 2P 2 P 6 @ LA6L P= 18.5kips Top chords AISC shape =L8X8X7/8 Bottom Chords AISC shape=W18X86 Web members AISC shape=W18X86 A=19.75ft,L=19.75ft 1. Draw the truss. Put node numbers, member numbers and degrees of freedom numbers [Marks: 10] 2. Calculate all member stiffness matrices in the global coordinate system and assemble them in a structure stiffness matrix, i.e. k matrix. [Marks:20] 3. Write the stiffness equation, solve for unknown displacements and calculate unknown forces by matrix operations. You may use Microsoft excel for calculations but you have to submit handwritten papers. (Marks:20]