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Showing results for tags 'negative eigenvalues'.
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Dear members, Using ETABS 16.2 version, when setting the stiffness modifiers for my slabs (shell-thin) to 1.0, the run goes smooth without warring and I will get reasonable mode periods. However, when I modify the m11, m22, and m12 stiffness to 0.5 for my slabs and run the model again, I got so...
