Investigating Efficiency of Vector-Valued Intensity Measures in Seismic Demand Assessment of Concrete Dams

Table 3

Dispersion of EDP|IM for IM as various ranges of S_a(T₁). The numbers in parentheses show the number of earthquake records that cause nonzero response values in each group.

EDP	Variation range of Sa(T1)
	0.0–0.2 g	0.2–0.4 g	0.4–0.6 g	0.6–1.11 g	0.0–1.11 g
Δc	0.133 (68)	0.138 (84)	0.279 (31)	0.409 (17)	0.202 (200)
DIbase	0.376 (52)	0.271 (84)	0.201 (31)	0.165 (17)	0.377 (184)
DIneck	— (0)	0.603 (10)	0.756 (21)	0.610 (17)	0.899 (48)
ED	0.488 (52)	0.346 (84)	0.363 (31)	0.353 (17)	0.453 (184)