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You are right. The section force gives the exact value of 75863 and is not affected by dead loads. Thank you very much. I thought that one of the Gauss point is at the element end and the recorder gives its moment as the element end moment.

By the way, where can we use element end forces?

Using BandSPD solver and 1.0e-15 strain hardening did not change the result, 77871. Using 2, 4, 8 and 10 Gaus points for integration resulted 77871, 77871, 77869 and 77869 plastic moments, respectively which has a little effect on the plastic moment value. However, more importantly, above values cha...

Thank you very much vesna. The dead load moment 60000kNcm may be high but it is affected for lower values also. My code is the following: wipe; model BasicBuilder -ndm 2 -ndf 3; source Wsection.tcl; # node coordinates node 14 0.00000 350.00000 node 13 0.00000 325.00000 node 12 0.00000 297.91667 node...

I have found the reason. OPENSEES opens recorder files first and later can not open the ground motion file because the maximum number of opened files is 512 for windows.

If you push 350cm length cantilever beam IPE500 (h=50cm b=20cm tf=1.6cm tweb=1.02 cm without neck curvatures) to 40cm top displacement, the moment value of the base section does not increase any more and you obtain the Mp value of the section. OPENSEES gives 77871 kNcm with fiber sections, displacem...

Does eleLoad contribute to section yielding? Or it is just added to the section moment value of the last step of puhover analysis?

I used ReadSMDFile and same directory but there was the same error message. Ver 2.2.1 also gives same error.

Opensees 2.3.0 can not open ground motion file and gives the error "WARNING - PathSeries::PathSeries() - could not open file". However the same file is processed correctly by ver. 2.1.0. I am using win 7. What should I do?

How does opensees consider the change of the location of plastic centroid during analysis for displacement based elements using fiber sections? Since the element rigidity matrix is based on the rule that any moment increment does not produce axial force, using a fixed centroid axis wont be appropria...

Hi

Ver 2.2.1 does not run. I tried it on two different computers with XP. Does it requre latest SPs? or something else

Thanks

The forces affect all the nodes not only the nodes on which they are applied. So, you should use displacement results of all the nodes.

In order to increase the 5DOF I added 1e-9 mass values in the Y direciton as you proposed in the manual and asked more eigen values. That solved the problem.

Thank you for your response.

I mean with "does not calculate" is that it gives the following error: BandArpackSolver::Error with _saupd info = -9999 Could not build an Arnoldi factorization.IPARAM(5) returns the size of the current Arnoldi factorization. The user is advised to check thatenough workspace and array stor...

Hi,

eigen command does not calculate 3 modes of a 5 DOF frame. There is no problem with:

2 modes of 5 DOF frame
3 modes of 10 DOF frame.

What is the reason of that?

Thanks.

Hi,

Unitless representation of fiber coordinates in the recorder command would provide a considerable amount of reduction in the number of output files.

Thanks.

reference post: "Number of maximum open files limit"