I am doing non linear direct integration time history analysis in etabs. To avoid convergence error, I used Hilber huges taylor parameter alpha value to be -1/12 instead of default 0. The analysis runs successfully but hinge state is not showing. How to fix this?
Hello all,
If hinges really exist, they will appear when repeating the analysis with smaller time steps once or by times. For faster arriving at the analysis where the hinges appear (especially if the problem is highly nonlinear) you can use smaller tolerances in each new repetition of the analysis. And, for a sample procedure for nonlinear time history analysis, including the repetitions, see the seismic code of New Zealand NZS 1170.5:2004, or some of my recent papers.
By the way, non-zero value for the parameter of the HHT is not for this purpose; it is for cancelling extra high frequency oscillation because of discretization in space.
OK, have a very nice day, and wonderful future throughout 2024. Bests,
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