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RC beam with cyclic loading

Posted: 15 May 2017, 16:51
by sem.ma
I have a problem with my analysis. My purpose is a validation work about a beam with cyclic loading. The time of this loading is 14000 seconds, but, my analysis has been stop in 4600 seconds. I check every thing and also see the topics of the forum and the video of seismosoft about solving error. But my error doesn't solve. I sent the *.spf file and also the reference paper to z.gronti@seismosoft.com and also support@seismosoft.com. Please help to correct my mistakes about the file or its error. Thank you.

Re: RC beam with cyclic loading

Posted: 17 May 2017, 13:39
by z.gronti
Dear sem.ma,

Could you please check the applied loads? Is the type of the applied load, in the loading curve, force, acceleration or displacement? If it is displacement then I think that you should select the static time-history analysis type.

Re: RC beam with cyclic loading

Posted: 19 May 2017, 18:16
by sem.ma
Thank you. Your answer was suitable. But there is a new problem. I change the analysis type to static time history analysis and done it based on displacement. Now, I saw that the problem was for connection of two nodes namely n1R and n2L. These nodes are in a same surface but in a different vertical distance. Infact, because of different area cross section of the beam, I used them. Now, the analysis showed that if I used constraint and slave these nodes for rigid link or equal degree of freedom separately and in different analysis, the analysis in the first steps was stopped and didn't completed (for both types of rigid link and equal degree of freedom). Also, when I remove the constraint, the analysis was completed, but, the graph showed that there was no reaction in the beam support, because there is no connection between two types of cross sections (infact between n1L and n1R). Could you please help me for this problem? I don't know how should be connect these nodes exactly to run my analysis correctly. I also check all of materials and sections based on reference paper.

Re: RC beam with cyclic loading

Posted: 24 May 2017, 12:10
by z.gronti
Dear sem.ma,

I don't have the corrected model, but could the problem be the assigned displacement? Could you please check the employed units and the curve multiplier in the applied loads?