To calculate wind load for industrial steel structures and to apply it by using TSD

1.

AIM:Generate manual wind loading in the design report based IS code as per the following input

• Basic wind speed = 39m/s
• Terrain category 2

PROCEDURE: 

• First we Calculate the load cominh on the structure and make the report
• 
• 
• 
• RESULT: All the calculation part done for the wall panels of the structure

2.

AIM: Based on the above calculation apply the loadings on the model 

PROCEDURE:

• Open the Tekla structural software
• Open the week 4 file we were working on
• Go to load panel->Loadcases->Add new wind load cases 
• 
• Now for the wind cases, apply the load as per calculated in the Excel sheets above starting from the wind+Y+Cpi condition.
• 
• Now as per the values in the sheet,apply the laod .
• 0.253KN/m2 acting on
• Frame 7 Wind+y+Cpi
• 
• -0.951KN/m2 acting on
• Frame 3 Wind+y+CPi
• Here -Ve value means the wind is acting away from the wind panel.
• 
• Next load is 1.521KN/m2 acting on
• face7 as Wind+Y-Cpi
• 
• Now the next load is 0.317KN/m2 on
• face3 as Wind+Y-Cpi
• 
• Now we will apply wind loads on the Face A&D grids (i.e. face C &D )
• Go to the load section in the bottom left and select wind+y+Cpi
• Select the area load
• Select global axis as X
• and enter the value -1.394KN/m2 for Face C
• 
• Similarly go to Face D(i.e grid D)
• Enter the value of load -0.127KN/m2
• select globals axis X and load pattern wind+Y-Cpi
• Now we will apply the load of -Y 
• All loading will be similar just the direction of wind is changed
• The load which was acting on the face 7 will act on Face 3 now with opposite sign.
•  The face A will be considered as Face B and B will be as Face A

• Frame 3 wind -Y+Cpi
• -0.253KN/m2
• 
• Frame 7 wind -Y+Cpi
• 0.951KN/m2
• 
• Frame 3 wind -Y-Cpi
• -1.521KN/m2
• 
• Frame 7 wind -Y-Cpi
• -0.317KN/m2
• 
• Now we apply load on Frame D as Wind-Y+Cpi
• with global axis X 1.394KN/m2 
• 
• Now we apply load on Frame A as Wind-Y-Cpi
• with global axis X 0.127KN/m2 
• 

//Similarly we apply the Wind X values as above after calculating the wind load in X direction

//For the X direction we use the value of 90degree and put in the values we find according to that

• Now we apply wind load on the roofs
• We find the angle of the roof which is 25degree
• according to that we find the external coefficient acting on the roof
• from IS 875 part 3 table 3 Clause 6.2.3.2
• 
• Now we apply load on Roof EF 
• Frame 2 slope wind+Y+CPi
• -1.204KN/m2 
• 
• Frame 2 slope wind+Y-CPi
• 0.063KN/m2 
• 
• Roof GH
• Frame 1 slope wind+Y+Cpi
• -1.267KN/m2
• 
• Roof GH
• Frame 1 slope wind+Y-Cpi
• 0KN/m2
•  
• Now we apply -Y loading on roof 
• The EF will become roof GH and will have -Ve values of EF we applied before 
• Roof EF
• Frame 1 slope wind-Y+Cpi
• 1.204KN/m2
• 
• Roof EF
• Frame 1 slope wind-Y-Cpi
• -0.063KN/m2
• 
• Roof GH
• Frame 2 slope wind-Y+Cpi
• 1.267KN/m2
• 
• Roof GH
• Frame 2 slope wind-Y-Cpi
• 0KN/m2
•  

//Similarly we apply load on X direction for roof as we applied in Y

given below is the data required to fill the load for X direction

3.

AIM: On a separate model generate wind loading using wind wizard 

PROCEDURE:

• Make a copy o the above tekla file
• Open the file
• Go to load panel->Loadcases
• Select the wind load cases you gave in the previous question and delete all.
• Only the default load cases will be left.
• 
• On load panel->click on a Wind wizard ->Worst case data
• Tick the cyclonnic effect
• 
• Now check all the basic details of the buildings like basic wind speed,height of bulding affected by wind
• k1,K2 factors,structure types
• 
• Check the terrain category->In this case it is category 2
• Fetch distance is the clear distance between other buildings from your building.
• 
• Click Next->then comes topography(if you want any,then select )or click NExt
• Now the resultant wind pressure is shown which are acting on the structure.
• 
• 
• Now click on finish.
• Now on wind load tab->Click on wind loadcases
• 
• enter the loadcases you want manually
• 
• Now the loads were applied on the structure in all the direction as per the values entered
• Click on validation to check for any errors->No errors are shown