Design For Dynamic Loads Assignment

Consider the three-story frame structure shown below. We are to do a preliminary design for serviceability based on the ASCE 7 spectrum for a size in Memphis, Tennessee (see attached for Response Spectrum) Use elastic analysis methods, modal superposition techniques, and 5% viscous damping in the following calculations and discussions Tabulate your results

1. Compute the story shears, floor level displacements, and overturning moments at floor levels Use SRSS. CQC, or the sum of the absolute modal responses as you see fit for as many modes 21 needed
2. Justify the solution method used in (a), clearly indicating how one should combine modes for this type of system and how to select the number of modes.
3. Compute the expected inter-story drifts that you would expect in the second story.
4. Based on your answer to parts (2). (c), and (d), comment on how various modes communicate to different response quantities in particular
   1. do you need a smaller number of modes to get displacements, shear, accelerations, and drifts? 0.050 0.000 0.000 Design Spectral Response Acceleration (g)
   2. How is the conclusion affected by the fundamental frequency of the structure (ie, would you expect that these calculations would change if the fundamental period was 0.3 sec) (do not calculates for this, just make a qualitative observemon on the basis of your numbers and shape of the response spectrum)

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