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ModElasticBeam2d element -> for Stiffness Modification Factors by D.Lignos Modified Ibarra-Medina-Krawinkler Model with Bilinear Hysteretic Response WARNING BandGenLinLapackSolver::solve() -factorization failed, matrix singular U(i,i) = 0, i= 0 WARNING BandGenLinLapackSolver::solve() -factorization ...