Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge

Table 3

Fragility parameters of the bridge at different 𝜃 for two orthogonal components of ground motion (case  I).

𝜃 (degree)	Fragility parameters at different damage levels			Normalized median values
	𝑐Minor (g)	𝑐Mod (g)	𝑐Major (g)	(𝑐𝜃/𝑐0)Minor	(𝑐𝜃/𝑐0)Mod	(𝑐𝜃/𝑐0)Major
0	0.365	0.500	0.742	1.000	1.000	1.000
15	0.400	0.479	0.715	1.096	0.958	0.964
30	0.387	0.463	0.670	1.060	0.926	0.903
45	0.407	0.500	0.690	1.115	1.000	0.930
60	0.402	0.500	0.728	1.101	1.000	0.981
75	0.364	0.514	0.745	0.997	1.028	1.004
90	0.355	0.484	0.738	0.973	0.968	0.995