Mitigation of Ground Vibration due to Collapse of a Large-Scale Cooling Tower with Novel Application of Materials as Cushions

Table 2

Maximum accelerations of observation ground point in radial and vertical directions at different initial velocities.

Number	Loading of rigid plane			Tube type	Max. acceleration (m/s^2)
	Velocity (m/s)	Kinetic energy (J)	Mass (kg)		Radial	Vertical
1	20	1.80 × 10^7	9.00 × 10^4	Thin-walled tube	1.49	4.20
				Equivalent tube	1.49	4.20
2	40	1.80 × 10^7	2.25 × 10^4	Thin-walled tube	1.87	4.96
				Equivalent tube	1.56	4.73
3	60	1.80 × 10^7	1.00 × 10^4	Thin-walled tube	1.63	5.75
				Equivalent tube	1.93	5.68