A Nonlinear Static Procedure for the Seismic Design of Symmetrical Irregular Bridges

Table 2

Changing parameters of girder and piers.

Member type	Variables	Parameter values
Girder	Lateral moment of inertia (m^4)	20, 40, 80, and 160
	Polar moment of inertia (m^4)	7, 14, 28, and 56
	Section area (m^2)	3.5, 7, 14, and 28
	Single span length (m)	20, 40, 80, and 160
Pier	Section area (m^2)	1.0 m × 1.0 m, 1.5 m × 1.5 m, 2.0 m × 2.0 m, and 2.5 m × 2.5 m
	Area ratio of longitudinal reinforcement	0.4%, 0.8%, 1.2%, and 1.6%
	Height distribution of piers	Pier2# varies as 5 m, 10 m, and 15 m, while pier1# equals to pier 3# and varies as 5 m, 10 m, 15 m, and 20 m synchronously