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

Table 2

Dispersion of EDP|IM considering single-valued IMs. The numbers in parentheses are the R² values of the corresponding linear regressions.

Intensity measure	Unit	Engineering demand parameter
		Δc	DIbase	DIneck	ED
TD	sec	0.709 (0.02)	0.878 (0.01)	1.341 (0.00)	1.245 (0.01)
PGA	g	0.477 (0.55)	0.739 (0.30)	1.128 (0.29)	0.933 (0.37)
PGV	cm/s	0.467 (0.57)	0.685 (0.40)	1.214 (0.18)	0.948 (0.43)
PGD	cm	0.594 (0.31)	0.793 (0.19)	1.319 (0.03)	1.122 (0.19)
Sa(T1)	g	0.202 (0.92)	0.377 (0.82)	0.899 (0.55)	0.453 (0.87)
Sa(T2)	g	0.300 (0.82)	0.592 (0.55)	1.054 (0.38)	0.776 (0.61)
Sv(T1)	cm/s	0.595 (0.31)	0.817 (0.14)	0.797 (0.65)	1.141 (0.17)
Sd(T1)	cm	0.592 (0.31)	0.805 (0.17)	0.901 (0.55)	1.126 (0.19)