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post a small example. try not to use variable up the wazoo so i can see what the actual numbers are.

try adding a 'remove recorders' before program exits

you do not need units at all .. the examples have them because the person who did them firmly believed in them .. if you keep your units constant in a file then drop them. as for rigid offsets .. they may be needed, depends on the column and the connection, if very stiff then modeling the beam going...

did you install tcl .. if so probably in wrong place .. find where tcl lib is and then and then edit the project setting to use that file.

try -xml instead of -file in the command line .. the xml description of data the preceeds the data in the output may help

you can modify the fatigue material to do whatever you want.

possibly because when they put the example together they did not have the ability to put stresses from all gauss points into one output file .. or maybe they wanted to keep them seperate .. does it really matter??

0 tensenion means the tangent is 0 when material goes into tension, hence the matrix (a 1x1) has a 0 on the diagnonal and hence it is not going to work!

you might need to brush up on dynamic analysis integration schemes (Newmark, Central Difference, ...), nonlinear solution algorithms (Newton Raphson, Modified Newton,...) before you start using OpenSees as you can get wrong answers if you do not know what you are doing. i suggest "Dynamics of Struct...

there should be no drop if you use loadConst .. do not add new load pattern do a step or 2 of analysis and results should not change .. if problems with second loading .. if you do not use 'locConst -time 0.0" the time series for second load step will return the factor at t_lastStepOfOldAnalysis + dT

you want to download a specific release tag using subversion .. release tags given in
http://opensees.berkeley.edu/OpenSees/changeLog.php

see page 4 or 17 for how to download specific release
https://greenbay.usc.edu/csci577/tools/ ... Manual.pdf

no

have you installed the correct versions of tcl and opensees .. either both 32 or both 64

look at page 6

http://opensees.berkeley.edu/wiki/image ... deling.pdf

set rho 1.7

mass in continuum problems typically comes from the element as computing mass terms for the nodes would be a nightmare for all but regular meshes.