I love Earthquake translation Ground Motion.No external dynamic forces are applied to the idealized two story structure shown in Fig. 25. The excitation in this case. Is the earthquake induced motion at the base of the structure presum], ed to be only a horizontal component of ground motion. With dis - placement Ug (T), velocity uR (T), and acceleration iig (T). Under the influence of such an excitation the base,, Of the structure displaces by an amount uR (T) if the ground, is rigid and the struc - ture undergoes deformation resulting. In floor displacements u.It) and UI (T), relative to the ground. The total displacements of.The floors are:
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