The Moment-Independent Importance Analysis of Structural Seismic Requirements Based on Orthogonal Polynomial Estimation

Table 1

Statistical parameters of random variables.

Random variables	Units	Distributions	Symbol	Means	Variation coefficients
Steel modulus	MPa	Normal [26]	Es	228559	0.033
Steel strength	MPa	Lognormal [27]	fy	384	0.078
Concrete modulus	MPa	Normal [28]	Ec	33904	0.08
Concrete strength	MPa	Normal [29]	fc	34.82	0.14
Structural damping ratio	—	Normal [30]	DA	0.05	0.2
Representative value of gravity load	kN/m^2	Normal [31]	Ms	6	0.1
Section steel strength	MPa	Normal [32]	fys	396	0.078
Section steel modulus	MPa	Normal [26]	Ess	228559	0.033