Research Article
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 |  | 
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