Dynamic Stability Discrimination Method for Concrete Dam under Complex Geological Conditions

Table 5

Catastrophe discrimination results of the points at the dam toe and heel with different reduction coefficients (20% decrease in the dam foundation strength).

Reduction coefficient	Key points	u		Δ	Result of catastrophe discrimination
2.2	Dam heel	0.023094	0.005313	0.000811	Noncatastrophe
	Dam toe	0.047434	0.011929	0.004269	Noncatastrophe
2.4	Dam heel	0.05625	0.008574	0.002697	Noncatastrophe
	Dam toe	0.069669	0.020231	0.012404	Noncatastrophe
2.6	Dam heel	−0.10016	0.009008	−0.001829	Catastrophe
	Dam toe	−0.08765	−0.0005	−0.002687	Catastrophe
2.8	Dam heel	−0.15368	−0.00321	−0.014241	Catastrophe
	Dam toe	−−0.18609	−0.00098	−0.025751	Catastrophe
3.0	Dam heel	−0.13073	0.00042	−0.008933	Catastrophe
	Dam toe	−0.12937	−−0.00341	−0.008347	Catastrophe
3.2	Dam heel	−0.15189	−0.00204	−0.013905	Catastrophe
	Dam toe	−0.15459	0.002175	−0.014649	Catastrophe