A Simplified Procedure for Base Sliding Evaluation of Concrete Gravity Dams under Seismic Action

Table 9

New dams: values of 𝛽 for each dam type evaluated with the spectral acceleration of Table 7 with reference to SLV, SLC, and an action with return period of 𝑇_RET=475 years, for granite (case of normal flood and case with 𝐿_𝑤/𝐿=0.85).

Dam tag	Rock type	normal flood			𝐿𝑤/𝐿=0.85
		SLV 𝛽	SLC 𝛽	SL475  𝛽	SLV 𝛽	SLC 𝛽	SL475  𝛽
2	granite	0.44	0.40	0.68	0.83	0.77	>1
3		0.36	0.33	0.61	0.77	0.7	>1
4		0.28	0.25	0.50	0.61	0.55	>1