Nested Copula Model for Overall Seismic Vulnerability Analysis of Multispan Bridges

Table 2

Equivalent stiffness of pile foundations.

Equivalent stiffnesses	Longitudinal direction	Transverse direction	Vertical direction
Translational stiffness (kN/m)	4.595 × 10^7	5.514 × 10^7	2.144 × 10^8
Rotational stiffness (kN•m/rad)	1.032 × 10^8	1.148 × 10^8	5.951 × 10^10