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Project - CE 456 Design of Steel Structures Professor...

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CE 456 Design of Steel Structures Professor Mohsen Kargahi Fall 2008 Project Due Date: December 4, 2008 ________________________________________________________________________________________ Page 1 of 2 The figures below represent typical floor framing plan and elevations of a 2-story building. Floor and roof systems are 5” thick 1-way reinforced concrete slabs spanning over equally spaced floor and roof beams. Floor live load is 100 psf. Roof live load is 20 psf. The lateral load resisting system is moment frames in E-W direction and braced frames in N-S direction as shown in the plan and elevations. Both systems are located at the exterior of the building. 0) Check Blackboard to see what a, b, and h is assigned to you. 1) To account for the weight of structural steel elements add 9.5 psf to roof dead load and 13.5 psf to floor dead load, and a. Determine the total seismic weight of the building by calculating and summing floor and roof dead loads. b. Determine the horizontal seismic force on the building by multiplying the total seismic weight by 0.3. Distribute the seismic force vertically by applying 1/3 to 2 nd floor and 2/3 to roof. Distribute the seismic force horizontally by assigning half of the load to each frame in each direction. c. Check the number of beams required in each bay given that the maximum length the slab can span in 8’-6”. Determine their spacing.
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This note was uploaded on 04/18/2009 for the course CE 456 taught by Professor Kargahi during the Fall '07 term at USC.

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Project - CE 456 Design of Steel Structures Professor...

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