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Professor thank you for your reply! I was using NormDispIncr so far (EnergyIncr gave me the same results) with Transformation constraints and Newmark integrator (γ=0.5 & β=0.25). NormUnbalance gives my analyses a really hard time to converge compared to the tests I was using, so I think you have...

Hello to everyone! My questions are: 1. Can too many FBE inside the plastic hinge length cause Numerical Instabilities? 2. Aren't FBE way more efficient than DBE? (I've read Vesna's presentation more than once!) My case (Not for the Faint-Hearted): I study the Inelastic Seismic Response of a Concret...

Dear aahashib, You have forgotten the dollar signs when defining the fiber coordinates to the local system at the Element Recorders. For example, write: "recorder Element -file $dataDir/SSC1.out -ele 3 section 1 fiber $ysb $zsb $IDconCB1 stressStrain;" With wishes this to be your only bug,...

Hello to everyone I am using Concrete04 to describe the behaviour of Confined Concrete using Mander's model (1988). After the ultimate strain, Concrete04 drops stresses to zero. I am thinking of Combining Concrete04 with another material using the "Parallel Material", to give it residual s...

Thanks again,

Just to be sure I got this right, aren't the factors a0, a1 applied to the Mass and Damping Matrices, so that [K]={K}+a0*{M}+a1*{C}
and so I will only need a0 if I neglect damping?

Gratefully,
VA

Hi, I am trying to record the stressStrain results for multiple elements using the eleRange option.The problem is that each element has its unique material tag that i am trying to record and the recorder command is not working when i give multiple material tags. How can i get the results creating on...

Prof. McKenna thank you for the fast reply! Using your first suggestion, are the coefficients a1,a2 the ones computed for Rayleigh damping? If they are and I don't use Rayleight Damping, I can't know their values, since I will not have given the two circular frequencies from which they will be compu...

Hello to everyone! If I don't give the masses directly to the nodes, but instead use the <-mass $massDens> choice while modeling the Elements, I can't aquire the node masses using the "nodeMass" command, although for solving the model, for a lumped-mass approach, the program has to distrib...