View previous topic::View next topic |
Author |
Message |
antonmichel SEFI Member
Joined: 01 Feb 2019 Posts: 4
|
Posted: Fri Feb 01, 2019 4:11 pmPost subject: Structure stability calculations |
|
|
Dear Engineers,
I am a civil engineer with a little experience, I have been asked by an architect to check if a building is stable or not. How can I check this?
I am not asked for detailed design or calculations, I have been asked just to check if the building is stable or not with very simple calculations, the building is a bit complex like the pictures shown.
Thank you all in advance,
Anton
|
|
Back to top |
|
|
VPandya General Sponsor
Joined: 09 Nov 2009 Posts: 841
|
Posted: Fri Feb 01, 2019 9:37 pmPost subject: Use 'GUIDE LINES FOR PROOF CHECKING FROM IAStructE. |
|
|
Er.antonmichel,
When Checking a Structure , Stability or any thing else in a Structure the only thing we do in our profession is : PROOF CHECKING OF BUILDING DESIGN AND GFC DRAWINGS BASED ON THIS ATTACHED DOCUMENT 'GUIDE LINES FOR PROOF CHECKING FROM IAStructE. In my opinion if you are a new Structural Engineer, you have to work on this project of Proof- Checking with some very experience Structural Engineer . It is quite possible that your Architect may not know about this document and its requirements .
Note : I do not have the complete document , so get the full copy of this attached document
Regards.
Vasudeo Pandya P.E. Structural Engineer
Warning:
Make sure you scan the downloaded attachment with updated antivirus tools before opening them. They may contain viruses. Use online scanners
here
and
here
to upload downloaded attachment to check for safety.
|
Description: |
Proof-Checking Guide Lines from Indian Association Of Structural Engineers IAStructE. |
|
Download |
Filename: |
IAStrcutE_Proof Checking.pdf |
Filesize: |
461.02 KB |
Downloaded: |
546 Time(s) |
|
|
Back to top |
|
|
antonmichel SEFI Member
Joined: 01 Feb 2019 Posts: 4
|
Posted: Sat Feb 02, 2019 4:50 pmPost subject: |
|
|
Thank you for responding,
Unfortunately, I don't have experienced engineer support, I just want to make a simple report with simple calculations for the architect, deciding if the building he designed is stable or not ? can constructed ? can you please tell me how to do this ? Shall i use softwars like SAP ?
thank you |
|
Back to top |
|
|
rojanmathewtsy General Sponsor
Joined: 21 Apr 2013 Posts: 29
|
Posted: Sun Feb 03, 2019 5:28 amPost subject: Re: Structure stability calculations |
|
|
antonmichel wrote: |
Dear Engineers,
I am a civil engineer with a little experience, I have been asked by an architect to check if a building is stable or not. How can I check this?
I am not asked for detailed design or calculations, I have been asked just to check if the building is stable or not with very simple calculations, the building is a bit complex like the pictures shown.
Thank you all in advance,
Anton
|
Dear Anton,
It is basically meant to make a possible structural layout of the building. You have to make a drawing( we call it structural keyplan)with columns and beams required as per your engineering judgement. Making such layout will give you an insight regarding the stability of the building. Suppose, as per the architect requirement there is a 10 m cantilever beam, obliviously it is not stable. So you may need to introduce something else to make it stable.
Rojan |
|
Back to top |
|
|
akos SEFI Member
Joined: 29 Jan 2009 Posts: 4
|
Posted: Mon Feb 04, 2019 9:43 amPost subject: Structure stability calculations |
|
|
Hi, May be he asked for checking the lateral stability of building. If the structure is not moment restrained provide proper horizontal and lateral bracing system against wind and EQ. |
|
Back to top |
|
|
antonmichel SEFI Member
Joined: 01 Feb 2019 Posts: 4
|
Posted: Tue Feb 05, 2019 5:46 pmPost subject: Re: Structure stability calculations |
|
|
rojanmathewtsy wrote: |
antonmichel wrote: |
Dear Engineers,
I am a civil engineer with a little experience, I have been asked by an architect to check if a building is stable or not. How can I check this?
I am not asked for detailed design or calculations, I have been asked just to check if the building is stable or not with very simple calculations, the building is a bit complex like the pictures shown.
Thank you all in advance,
Anton
|
Dear Anton,
It is basically meant to make a possible structural layout of the building. You have to make a drawing( we call it structural keyplan)with columns and beams required as per your engineering judgement. Making such layout will give you an insight regarding the stability of the building. Suppose, as per the architect requirement there is a 10 m cantilever beam, obliviously it is not stable. So you may need to introduce something else to make it stable.
Rojan |
Thank you for your reply!, I think I can do this step,i can calculate the load, shear... etc. but then how can I decide if I can design a structure that can bear this load. For example, after analysis of a specific beam, how can I decide if I can design a beam from steel or concrete to bear this shear or bending load? or that it is impossible for the beam to bear this load?. |
|
Back to top |
|
|
antonmichel SEFI Member
Joined: 01 Feb 2019 Posts: 4
|
Posted: Tue Feb 05, 2019 5:48 pmPost subject: Re: Structure stability calculations |
|
|
akos wrote: |
Hi, May be he asked for checking the lateral stability of building. If the structure is not moment restrained provide proper horizontal and lateral bracing system against wind and EQ. |
I will check this, of course, this is most critical for the design of foundations right? and do you know any guideline of how to do this exactly?
thank you |
|
Back to top |
|
|
mjnasar ...
Joined: 26 Jan 2003 Posts: 70
|
Posted: Wed Feb 06, 2019 5:46 amPost subject: |
|
|
Dear Eng.
May be Following steps will help you for checking building ( basics )
1) Check the columns & beams are spaced properly ( too long and too small span / spacing required fine degree of analysis and design requirements )
2) Slab depth check --> span / 20 to 28 ( ACI318-14 -- CH-7.3.1.1 )
3) Beam depth Check --> Span/16 to 21 ( ACI318-14 -- CH-9.3.1.1 )
4) Column Sizing = tributary area / 400 = column area ( assuming 15kn/m2 load , fc=30 fy=420n/mm2 and 1% steel )
5) Footing size = ( tributary area of columnTa * 15 / Bearing capacity ) Bearing pressure = load * 1.1 / B*D Moment in footing = BP * b*d/2 Footing thickness = sqrt (M/0.85fc ) can be minimum depth = Sqrt (300Ta/b)
6)Stability against wind = surface exposed to wind * 1.0 wind pressure = lateral force Stability = Building weight / lateral force > 2
7)地震=简历*我* W / RT为简化= =0.5*1*Building weight / 6 * 0.4 Stability = Building weight / Earth quake > 2
Regards |
|
Back to top |
|
|
|