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Cylindric shell question

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01-30-2012 10:49 PM

I examine an cylindrical shell r=1,46 meters,l=6,4 meters with loads of selfweight, snow 0,7 and insulation 0,342.Thickness is 8 centimeter. Load Combination: ULS -> 1,35G+1,5Q. Shell suports are fixed. I take results in displacements such 0,111 mm and smaller. This seems a little confussing. In order to examine the shell i add a linear displacement of 4mm in scale from node to node for example 1node-4mm, 2 node- 3,9mm, 3node->3,8 until the end of displacement. I took great moments. I believe that is impossible to have only 0,111mm Uz. Please could you tell if there is a problem with displacements displayed by the programm?

 

Kind regards,

iassoniako

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Re: Cylindric shell question

01-31-2012 12:40 AM in reply to: iassoniako

If possible please upload the robot file.



Rafal Gaweda
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Re: Cylindric shell question

01-31-2012 05:34 AM in reply to: Rafal.Gaweda

My quick check: geometry as you described, thickness 8cm Concrete, only selfweight.

Resulst as shown below (in mm)

 

 swcyl.jpg



Rafal Gaweda
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Re: Cylindric shell question

01-31-2012 07:13 AM in reply to: iassoniako

I mean that case

 

ok.GIF

 

I feel that the Uz displacements are very small.

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Re: Cylindric shell question

01-31-2012 07:57 AM in reply to: iassoniako

Keep in mind it is cylindrical shell :

 

Selfweight only:

 

ucyl.jpg

 

Flat plate 2,92x6,4 gives you 6 times bigger displacement:

 

flat.jpg



Rafal Gaweda
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Re: Cylindric shell question

01-31-2012 08:11 AM in reply to: Rafal.Gaweda

thank you very much