3Wave propagation in a Timoshenko beam model of a high rise building, excited by base 4 motion, is analyzed. This model accounts for wave dispersion due to bending and is more 5 realistic for analysis of wave propagation in high rise buildings than shear beam and other 6 discrete nondispersive models. The model transfer-functions and impulse response functions are 7 obtained from the analytical solution for forced vibration response of the beam excited by base 8 motion. The impulse response functions represent the model response to a virtual input pulse; a 9 set of such functions at different levels is used to study pulse propagation in the beam. 10Parametric study of dispersion and its effects on the model transfer-functions and impulse 11 response functions is presented, in terms of dimensionless parameters, in ranges corresponding to 12 buildings. The model is validated for a 9-story full-scale RC building and smaller earthquake 13 excitation. The results provide insight into dispersive wave propagation in buildings caused by 14 bending, which is useful for the interpretation of impulse responses of buildings obtained from 15 earthquake records and for the development and testing of wave methods for structural health 16 monitoring. The results can also be used for testing numerical models for pulse propagation in 17 buildings. 18
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