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

Table 4

Fragility parameters of the bridge at different 𝜃 for one component of ground motion (case  II).

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	0.560	0.707	1.060	1.000	1.000	1.000
15	0.476	0.557	0.822	0.850	0.788	0.775
30	0.435	0.517	0.742	0.777	0.731	0.700
45	0.407	0.517	0.742	0.727	0.731	0.700
60	0.435	0.517	0.760	0.777	0.731	0.717
75	0.490	0.579	0.778	0.875	0.819	0.734
90	0.560	0.617	0.856	1.000	0.873	0.808