# Wind pulsation and problems of modeling

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Wind pulsation and problems of modeling
 santon85 Visitor Posts: 8 Points: 4 Joined: Jun 5, 2014 #1 Sep 15, 2014 13:21:47 Hello! Tell me, please, what went wrong? I have created a scheme of multi-storey frame. Also I have added wind load and pulsation for it, according to the reference. I was very confused by the results. Elevator shafts and the frame itself are moving in different directions. What did I wrong? File is made in LIRA-SAPR 2013. Yours sincerely, Anton! Attached Files 1.lir (14.2 Mb)
 alekstish Expert Posts: 474 Points: 849 Joined: May 13, 2010 #2 Sep 16, 2014 16:35:54 Elements of the staircase and floor slab do not have common nodes. Edited: alekstish - Oct 7, 2014 17:11:16
 santon85 Visitor Posts: 8 Points: 4 Joined: Jun 5, 2014 #3 Sep 17, 2014 16:38:43 Thank you very much for the help. Is it possible during the calculation of pulsation set individual constructions, for which it would not be taken into account? For example, in this project elevator shaft works separate from the frame of the building and does not affect its movement. At the same time, pulsation on this shaft is calculated.Yours sincerely, Anton
 ander Guru Posts: 1399 Points: 2377 Joined: May 31, 2007 #4 Sep 18, 2014 07:41:36 If shaft does not affect loads on the basis, then maybe it is easier not to set shaft?You can define loads from the shaft on the basis from results of particular load cases and set them directly as loads. Previously, you could set super element for not interesting vibrations. Now I do not know whether it works or not.
 рекс Expert Posts: 592 Points: 580 Joined: Sep 10, 2007 #5 Sep 18, 2014 10:42:51 It is enough to have two load cases for constant load. First is for the shaft, and other is for the rest. Dead weight of the building is taken into account by these conditions. During the creation of the mass from load cases, it is required to ignore shaft load case. It follows, that connection of two parts of the building during dynamic calculation would be possible only through a common foundation slab and the ground, if you use volumetric elements for modeling. no volume in this case it would be something minor. You can also have a separate foundation for the mine. But in this case it would be something minor. You can also have a individual foundation for the shaft.