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

Table 6

Failure probabilities to elastic buckling.

PGA ()	0.1	0.12	0.14	0.16	0.18	0.20	0.22	0.24
Unstiffened tank	0.178	0.251	0.323	0.391	0.454	0.512	0.563	0.610
Ring-stiffened tank	0.079	0.129	0.186	0.246	0.307	0.366	0.423	0.476
Difference	0.099	0.122	0.137	0.145	0.147	0.146	0.140	0.134
PGA ()	0.26	0.28	0.30	0.32	0.34	0.36	0.38	0.40
Unstiffened tank	0.651	0.688	0.721	0.750	0.775	0.798	0.818	0.836
Ring-stiffened tank	0.526	0.571	0.612	0.650	0.684	0.715	0.743	0.767
Difference	0.125	0.117	0.109	0.100	0.091	0.083	0.075	0.069