Seismic Vulnerability Analysis of Multispan Continuous Bridges Subjected to Mainshock-Aftershock Earthquake Sequences

Table 5

Free vibration response of bridge components.

Free vibration time (s)	1^# artificial seismic record		2^# artificial seismic record		3^# artificial seismic record
	Displacement of the 1^# pier top (mm)	Displacement of the 4^# pier top (mm)	Displacement of the 4^# bearing (mm)	Displacement of left abutment (mm)	Displacement of the 3^# pier top (mm)	Bending moment of the 2^# pier bottom (kN·m)
0	0.342	0.306	0.739	4.786	1.161	830.480
15	0.076	0.049	0.130	0.915	0.584	526.018
30	0.067	0.039	0.112	0.797	0.563	515.162
35	0.067	0.039	0.111	0.794	0.563	514.950
45	0.067	0.039	0.111	0.793	0.562	514.858
60	0.067	0.039	0.111	0.793	0.562	514.848
Postearthquake position	0.067	0.039	0.111	0.793	0.562	514.848
Maximum response under earthquake	45.356	45.847	124.294	125.129	286.237	42164.100