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Thanks mhscott, to clarify, by "results" i mean that I am measuring the lateral drift of a reinforced concrete portal frame using two identical models - one with uniform excitation and the other with multisupport excitation. I have found that when I use Rayleigh damping command with only the betaKco...

Hello all, I have been working on a 2D reinforced concrete frame model with concentrated plasticity hinges at the ends of every member. The concentrated plasticity springs are modeled using the 'Hystertic' material. I have been working on verifying that the uniform excitation pattern generates the s...