Effects of Structural and Seismic Factors on the Constant-Strength Ductility Spectra Based on NGA-West2 Database

Table 1

Influencing factors and parameters.

Different aspects	Parameters
Structural parameters	Period (T)
	The yield strength coefficient (Cy)
	Damping ratio (ζ)
	The postyield stiffness ratio (k2)
Seismic factors	Earthquake magnitude (M)
	Epicentre distance (R)
	Peak ground acceleration (PGA)
	Effective peak velocity (EPV)
	Significant duration (Ds)