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Wind Loads

 
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Aatif
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Joined: 26 Jul 2016
Posts: 24
Location: bangalore

PostPosted: Tue Apr 07, 2020 4:47 pm    Post subject: Wind Loads Reply with quote

Hello Sefians.
I have two questions on Wind Loading Acting/Applying on a Structure.

1. When do we use Pressure Coefficients Cpe and CPi and when should be calculate just design wind Pressure Pd or Force F? What are the Conditions in which they are to be calculated.

2. While applying wind loading in ETABS, there are 3 options.
a) from extents of Rigid Diaphragm
b) Exposure from Area Objects
c) User defined wind loads.

How are suitability of these Methods to be adopted is chosen?
i.e which of the above three methods are to be used and in which conditions.

Kindly let me know.
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thirumalaichettiar
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PostPosted: Wed Apr 08, 2020 1:33 am    Post subject: Reply with quote

Check the attached PDF.


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Aatif
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Joined: 26 Jul 2016
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Location: bangalore

PostPosted: Wed Apr 08, 2020 3:17 am    Post subject: Reply with quote

thirumalaichettiar wrote:
Check the attached PDF.



Thank you sir for answering.

I have gone through the attached PDF. For Sheds , We need to calculate wind force Acting for individual members such as walls and roofs (with Pressure Coefficients) and for normal RCC Buildings, we calculate Just Design Wind Pressure Pd.

Is My Understanding correct?
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badamsundararao
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Joined: 24 Dec 2009
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Location: KAKINADA ANDHRA PRADESH

PostPosted: Wed Apr 08, 2020 2:34 pm    Post subject: WIND LOADS-ETABS Reply with quote

In ETABS,for Wind load application,I feel it is better to opt for "From the Extents of Rigid Diaphragm.It satisfies all shapes of buildings.
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es_jayakumar
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PostPosted: Wed Apr 08, 2020 3:53 pm    Post subject: Reply with quote

Aatif wrote:
thirumalaichettiar wrote:
Check the attached PDF.



Thank you sir for answering.

I have gone through the attached PDF. For Sheds , We need to calculate wind force Acting for individual members such as walls and roofs (with Pressure Coefficients) and for normal RCC Buildings, we calculate Just Design Wind Pressure Pd.

Is My Understanding correct?


For the trussed roof of a shed, the major design force is the wind force, precisely the resultant upward wind pressure, because of the lightness of the roof. That is why the calculation of wind force on its roof members is more important. In the case of an RCC roof, the self weight will counter the upward wind thrust. However, the walls / cladding of both the buildings will be subjected to wind load in a similar manner, depending on the permeability of the building.

E S Jayakumar
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