5. (20 points) The truss shown below supports horizontal forces of 6 kips at Joint G,...

Question:

5. (20 points) The truss shown below supports horizontal forces of 6 kips at Joint G, 8 kips at Joint E, and 4 kips at Joint C. All truss members are made of steel (E 29,000 ksi). Each of the diagonal members (Members AD, DE, and EH) has a cross-sectional area of 1.2 in2. Each of the vertical members (Members AC, CE, EG, BD, DF and FH) has a cross-sectional area of 2.4 in Each of the horizontal members (Members CD, EF, and GH) has a cross-sectional area of 4.1 in2 Use the Method of Virtual Work (the Unit Force Method) to determine the horizontal deflections at Joint H, Joint F, and Joint D due to the applied loads. If the truss is the one of the internal frames for a 3-story structure (Member GH represents the flat roof of the structure), determine the interstory drift and the story drift ratio for each story of the structure 3 0FT G, FT 8k FY FT

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