Seismic Retrofit of a Multispan Prestressed Concrete Girder Bridge with Friction Pendulum Devices

Table 9

Maximum values of the Seismic Isolated Bridge response parameters: device lateral displacements, device axial force, bending moment about weak axes, and shear at base of external pier columns.

Model	Optimal FPD device ( = 1.9 m)					Standard FPD device ( = 2.5 m)
	Lateral displacement		Axial force	Bending moment	Shear	Lateral displacement		Axial Force	Bending moment	Shear
	Radial	Angle				Radial	Angle
	[cm]	[deg]	[kN]	[kNm]	[kN]	[cm]	[deg]	[kN]	[kNm]	[kN]
	10.40	97.95	1090	1013	116	10.03	95.66	1088	923	103
	10.90	98.81	1301	1065	101	10.06	95.54	1300	967	107
	9.72	277.20	1294	1575	193	9.50	278.80	1292	1414	184
	9.07	276.65	1283	1567	188	9.10	277.66	1283	1383	182
	9.79	277.75	1308	1555	197	9.88	279.47	1311	1437	188

= = 3%; = 2%   = 6%   = 8%.