A water tank of mass \(10^{5} \mathrm{~kg}\) is supported on a reinforced cement concrete column, as shown in Fig. 9.49(a). When a projectile hits the tank, it causes a shock, in the form of a step force, as

shown in Fig. 9.49(b). Determine the stiffness of the column if the maximum deflection of the tank is to be limited to \(0.5 \mathrm{~m}\). The response spectrum of the shock load is shown in Fig. 9.49(c).

Transcribed Image Text:

F(t) m k F(t) Fo Fo sin Fo= 20,000 N (a) 0 (b) to t