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Civil Engineering Association Civil Engineering Resource Civil Engineering Documents Calculation Notes & Analysis Files Analysis of a Building 4 floors in Etabs

Analysis of a Building 4 floors in Etabs
 Veggeta

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#1
12-11-2009, 06:44 AM (This post was last modified: 12-11-2009, 06:44 AM by Veggeta.)
Analysis of a Building 4 floors in Etabs

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Analysis of a building of metallic structure of 4 floors(flats), realized in Etabs...

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[Image: 07282536627184386885.jpg]
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[-] The following 16 users Like Veggeta's post:16 users Like Veggeta's post
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#2
12-11-2009, 07:30 AM
can you explain more from this model?

- type of frames
- codes of design
- place
- type of other elements
....

this look a good model...



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  • Grunf, dalberto
 robertsas

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#3
12-11-2009, 08:20 AM
Dear Veggeta,

I run this model without change anything, it give :

* * * W A R N I N G * * *
ZERO STIFFNESS FOUND DURING SOLUTION FOR DOF UX OF JOINT 872
LOCATED AT X = 12.500000, Y = 1.500000, Z = 5.650000,
STIFFNESS MATRIX DIAGONAL VALUE SET TO 1.00E-10


* * * W A R N I N G * * *
THE STRUCTURE IS UNSTABLE OR ILL-CONDITIONED !!
CHECK THE STRUCTURE CAREFULLY FOR:
- INADEQUATE SUPPORT CONDITIONS, OR
- ONE OR MORE INTERNAL MECHANISMS, OR
- ZERO OR NEGATIVE STIFFNESS PROPERTIES, OR
- EXTREMELY LARGE STIFFNESS PROPERTIES, OR
- BUCKLING UNDER P-DELTA LOADS (IF ANY), OR
- AN EIGEN SHIFT (IF ANY) ONTO A NATURAL FREQUENCY

I fixed it because some of stair beams are not conected to the bordes (LOCATED AT X = 12.500000, Y = 1.500000, Z = 5.650000)

May I ask you what kind of material Durock? Can you explained what is that material..
because you run with UBC respons spectrum with Scale Factor = 0,3...


regards,
robertsasmita



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 vinnunsam

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#4
12-11-2009, 08:22 PM
Dear Veggeta,

Have you prepared a DBR (Design Basis Report) for this model. If you have completed, can you upload it.
Regards,
Vinu...

"A Smallest Good Deed Is Bigger Than Greatest Good Intention".




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  • zayobayo1
 Veggeta

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#5
12-12-2009, 12:40 AM
Dear Robertsas,
I will check the very prompt model, it is possible that I have been wrong of file ... what happens is that I am out for labour motives and not have access to my files these days..

If I have it, but in Spanish, I am going to summarize it and am going to hang it...

Sorry for the caused problems...

Sorry bad englis...

Regards...



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 Nilupa

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#6
12-22-2009, 04:09 PM
don't you have sap analysis file..?



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 tase

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#7
01-28-2010, 07:54 PM
hello!
If you still watch this thread can you explain me what was to purpose of modelling the exterior walls? The horizontal shear force will load these walls while the frames will be unloaded.



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