VPGA - What does VPGA stand for? The Free Dictionary
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where P(C < D)|(HPGa, VPGa/HPGa) represents the probability of failure corresponding to a damage state defined under a given horizontal ground motion acceleration intensity (HPGa) and a given ratio between the vertical and horizontal components of the ground motion acceleration intensity (VPGa/HPGa); VPGa
denotes the vertical ground motion intensity; and [[sigma].sub.v]/[[xi].sub.v] are the mean and standard deviation of the seismic intensity that leads to a damage state under a given ratio between the vertical and horizontal intensities, respectively.
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