Importance Analysis of Structural Seismic Demand Based on Support Vector Machine

Table 2

Statistical parameters of random variables.

Random variables	Symbol	Variation coefficients	Units	Distributions	Means
Concrete strength	fc	0.140	Mpa	Normal [32]	34.82
Steel strength	fy	0.078	Mpa	Lognormal [33]	384
Section steel strength	fys	0.078	Mpa	Normal [34]	396
Concrete modulus	Ec	0.080	Mpa	Normal [35]	33904
Steel modulus	Es	0.033	Mpa	Normal [36]	228559
Section steel modulus	Ess	0.033	Mpa	Normal [36]	228559
Representative value of gravity load	Ms	0.100	kN/m^2	Normal [37]	6
Structural damping ratio	DA	0.200	—	Normal [27]	0.05

Note: the structural quality in the table is taken as the representative value of gravity load.