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

Table 5

Return period (𝑇_RET)—in years—for the different limit states considered, relative to the probability of exceeding 𝑃_𝑉𝑅 for new (𝑉_𝑅=200) and existing dams (𝑉_𝑅=100).

Limit state	𝑃𝑉𝑅  %	𝑇RET new	𝑇RET existing
SLO	81	120	60
SLD	63	200	100
SLV	10	1900	950
SLC	5	2475	1946