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D = $alphaM * M + $betaK * Kcurrent +$betaKinit * Kinit + $betaKcomm * KlastCommit rayleigh $alphaM $betaK $betaKinit $betaKcomm $alphaM factor applied to elements or nodes mass matrix $betaK factor applied to elements current stiffness matrix. $betaKinit factor applied to elements initial stiffness...

I am modeling a single bridge pier supported in pile cap considering soil-structure interaction as shown in the file. -The piles are modeled as elastic force beam element. While the pier is modeled as nonlinear force beam element. -The pile and pile cap are fully bonded to soil with EqualDOF in X an...