Seismic Performance Assessment of Deteriorated Two-Span Reinforced Concrete Bridges

International Journal of Concrete Structures and Materials

Table 4 Comparative evaluation of progressive damage and seismic performance level for Case-1D, Case-2D and Case-3D.

Input Acceleration	Case-1D		Case-2D		Case-3D
Input Acceleration	Damage index	Seismic performance level	Damage index	Seismic performance level	Damage index	Seismic performance level
1 × 0.154 g	0.14	Delayed operational	0.18	Delayed operational	0.19	Delayed operational
2 × 0.154 g	0.26	Delayed operational	0.33	Delayed operational	0.34	Delayed operational
3 × 0.154 g	0.45	Stability	0.57	Stability	0.50	Stability
4 × 0.154 g	0.57	Stability	0.65	Stability	0.67	Stability
5 × 0.154 g	0.83	–	0.94	–	1.00	–
6 × 0.154 g	1.00	–	1.00	–	1.00	–

Case-1D, Case-2D, Case-3D: longitudinal reinforcement ratio & transverse reinforcement ratio—64% of Case-1, Case-2, Case-3.