Performance and Risk Assessment of Soil-Structure Interaction Systems Based on Finite Element Reliability Methods

Table 5

Comparison of various methods for computing the 𝑃_𝑓 (LSF: 𝑔₁=Δ_limit−Δ₁).

	Δlimit (cm)	5.0	7.5	10.0
FORM	𝑃𝑓	8.94𝑒−2	8.19𝑒−4	1.59𝑒−4
	Number of evaluations	19	18	18
MCS	𝑃𝑓	9.03𝑒−2	5.00𝑒−4	0
	c.o.v	0.032	0.447	—
	Number of evaluations	10000	10000	10000
IS	𝑃𝑓	8.62𝑒−2	8.27𝑒−4	1.42𝑒−4
	c.o.v	0.1	0.1	0.1
	Number of evaluations	185	397	524
OPS	𝑃𝑓	8.85𝑒−2	7.01𝑒−4	1.05𝑒−4
	c.o.v	0.1	0.1	0.1
	Number of samplings	109	128	168
	Number of evaluations	586	860	1454