Optimal Seismic Intensity Measure Selection for Isolated Bridges under Pulse-Like Ground Motions

Table 7

Demand models and proficiency comparison of IMs subjected to far-field ground motions.

Height (m)	μx							δx
	PGA	PGV	PGD	CAD	Ia	Iv	CAV	PGA	PGV	PGD	CAD	Ia	Iv	CAV
4	0.76	0.59	1.06	0.68	1.01	1.08	0.51	0.59	0.40	1.05	0.62	0.89	0.86	0.50
6	0.77	0.66	1.83	0.86	1.06	1.38	0.53	0.79	0.61	1.51	0.88	1.12	1.32	0.59
8	0.85	0.58	1.50	0.74	1.13	1.16	0.54	0.82	0.62	1.54	0.88	1.16	1.32	0.61
10	1.02	0.69	1.40	0.76	1.36	1.27	0.61	0.91	0.66	1.48	0.87	1.25	1.35	0.63
12	0.91	0.64	1.30	0.72	1.19	1.17	0.55	0.85	0.67	1.47	0.83	1.20	1.31	0.60
14	0.85	0.54	1.13	0.65	1.15	1.02	0.53	0.81	0.57	1.19	0.69	1.09	1.08	0.54
16	0.94	0.60	1.03	0.64	1.26	1.04	0.58	0.85	0.56	1.05	0.66	1.14	1.02	0.55
18	1.05	0.63	0.92	0.59	1.40	1.01	0.62	0.80	0.55	0.98	0.60	1.05	0.98	0.49
20	1.09	0.62	0.92	0.55	1.43	0.96	0.61	0.80	0.61	1.03	0.67	1.10	1.10	0.51

Note: bold values indicate more proficient IM.