Table 5. Coefficient of determination (... | Emerald Publishing

Table 5.

Coefficient of determination (R²) of the IM–DCR_LS regression and parameters of fragility curves

	Deep tunnel, dense sand				Deep tunnel, loose sand				Shallow tunnel, dense sand				Shallow tunnel, loose sand
	PGA_im	PGA_gl	PGV_im	PGV_gl	PGA_im	PGA_gl	PGV_im	PGV_gl	PGA_im	PGA_gl	PGV_im	PGV_gl	PGA_im	PGA_gl	PGV_im	PGV_gl
R²	0·45	0·83	0·58	0·94	0·26	0·47	0·59	0·94	0·71	0·84	0·73	0·58	0·43	0·70	0·63	0·89
a	1·51	1·86	0·02	0·01	0·73	2·10	0·03	0·01	1·41	1·54	0·08	0·03	0·83	2·15	0·06	0·03
b	1·47	1·37	0·95	1·17	0·82	1·43	0·69	0·95	1·02	1·30	0·55	0·71	0·83	1·36	0·56	0·71
σ	0·80	0·21	0·70	0·26	0·67	0·57	0·50	0·19	0·29	0·20	0·28	0·35	0·46	0·33	0·37	0·20

	Deep tunnel, dense sand				Deep tunnel, loose sand				Shallow tunnel, dense sand				Shallow tunnel, loose sand
	PGA_im	PGA_gl	PGV_im	PGV_gl	PGA_im	PGA_gl	PGV_im	PGV_gl	PGA_im	PGA_gl	PGV_im	PGV_gl	PGA_im	PGA_gl	PGV_im	PGV_gl
R²	0·45	0·83	0·58	0·94	0·26	0·47	0·59	0·94	0·71	0·84	0·73	0·58	0·43	0·70	0·63	0·89
a	1·51	1·86	0·02	0·01	0·73	2·10	0·03	0·01	1·41	1·54	0·08	0·03	0·83	2·15	0·06	0·03
b	1·47	1·37	0·95	1·17	0·82	1·43	0·69	0·95	1·02	1·30	0·55	0·71	0·83	1·36	0·56	0·71
σ	0·80	0·21	0·70	0·26	0·67	0·57	0·50	0·19	0·29	0·20	0·28	0·35	0·46	0·33	0·37	0·20