Seismic Fragility Analysis of Steel Liquid Storage Tanks Using Earthquake Ground Motions Recorded in Korea

Table 5

Statistical parameters of the capacity and demand.

Model type	Limit state
Unstiffened tank	Elastic buckling	0.0151 (m)	0.1368	0.2011
	Elephant’s foot buckling	36.5227 (MPa)	0.0970	0.3672
	Steel yielding	247.6041 (MPa)	0.0699	0.1128
Ring-stiffened tank	Elastic buckling	0.0103 (m)	0.1102	0.1550
	Elephant’s foot buckling	31.3111 (MPa)	0.2192	0.4450
	Steel yielding	247.6041 (MPa)	0.0699	0.1157