This study evaluates the hysteretic energy distribution over the height of buildings that have been designed for the lateral force requirements of the 1994 Uniform Building Code. The case study buildings used in this effort are three story, nine story and twenty story steel structures designed as part of the SAC Steel Program. Nonlinear dynamic time history analyses are conducted for an ensemble of earthquake ground motions that are representative of earthquakes having a 10/50 probability of occurrence. The distribution of hysteretic energy over the heights of each building is presented. The hysteretic energy obtained from the multistory analyses is also compared with the results from an equivalent generalized single degree of freedom analysis for each building type. It is found that when the energies are normalized relative to the mass of the structure, a good agreement is obtained.
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