Experimental Study on Seismic Performance of Prefabricated Utility Tunnel

Table 6

Predominant frequencies of soil and structure.

	Soil								Utility tunnel	Pipeline
Distance from the bottom (m)		A1	A2	A7	A9	A11	A3	A4	As2	As6
		0.1	0.25	0.4	0.55	0.7	0.85	1
Input PGA	0.125 g	7.300	25.698	29.599	29.649	29.699	25.748	25.748	25.748	25.649
	0.375 g	5.833	5.833	26.050	26.100	29.650	29.651	29.650	26.1	25.2
	0.75 g	5.838	5.838	5.800	5.800	5.800	26.124	26.099	26.049	18.9