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

1. Generate manual wind loading in the design report based IS code as per the following input

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

A) AIM: TO GENERATE MANUAL WIND LOADING IN THE DESIGN REPORT BASED ON IS CODE AND MENTIONED INPUTS.

TOOLS/APPARATUS REQUIRED:

EXCEL

IS CODEBOOK(875 P3)

DIMENSION

CALCULATOR

property window( for roof angle)

 

PROCEDURE:

1) primarily as we are going to calculate wind loads in an excel sheet so let us open the excel sheet.

2) we make use of IS code for assigning some values so arrange IS 875(part-3)  

3) Now let us assign the given parameters in the excel sheet i.e 

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

apart from this let us also assign some other factors that are

            probable design life of structure-50 years (assumption)

            class of structure                     -A

 

4) apart from the above-mentioned properties let us assign some other properties that include the physical properties of the model 

greater horizontal dimension, the lesser horizontal dimension of the structure, eaves level height,

and width of the structure

 

5) now from these dimensions let us calculate the ratio for wall & roof coefficient and with those coefficients, we can calculate A, B, C, D

6) from these details and as per IS code calculate coefficients

k1 from the design period

k2 terrain, height & string size factor

k3 topographic factor

k4 factor-related to cyclone occurrence

7) from these coefficients and details we can compute design wind speed and design wind pressure

by substituting in the formula

Vz=vb*k1*k2*k3*k4  &

pz=o.6*Vz2 (convert it from n/mm2 to KN/m2)

8)then  we have to calculate the wind loads in both the X and Y direction with the help of cpi

and calculate 

• External pressure coefficients.
• Internal pressure coefficients.
• Net pressure coefficients.
• Design wind pressure for the wall.

9)we have to apply factor for safety let us consider it as 1.05 so we have to multiply the load we get by 1.05

10)By multiplying the factor we get to know the loading to be applied on the wall face(+-Cpi) we get the values of wind loads that are to be applied on the walls of the members.

11)similarly we model wind loads for roof in the same way as for the faces A, B, C, D but instead of ratios we make use of roof angle.

 

RESULT:

we have Generate manual wind loading in the design report based IS code as per the following input

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

and we calculated values of the wind load 

for face A, C

 for face B & D

For roof 

 

 

 

2. Based on the above calculation apply the loadings on the model

AIM: TO APPLY THE WIND LOADINGS ON THE MODEL(WALLS,ROOF) FROM THE ABOVE CALCULATION

 

TOOLS/REQUIRED:

FILE

OPEN

SAVE

LOAD

LOAD CAES

VALIDATE

AREA LOAD

PROPERTY WINDOW

PROJECT BROWSER

FRAMES

SEEN CONTENT

WIND LOAD

SAVE

 

PROCEDURE:

1. Open the saved file in Tekla software using the open tab present in File ion.

2. Then select load cases icon present in load toolbar a window appears.

3.then click on add and name it as wind+Y+Cpi and assign it to wind load.

4.Similarly add 3  more loads in the similar way and assign the type of load as wind load.

5) now let us select a load, say WIND+Y+Cpi at the bottom down box after selecting the load option and select the area load option available and modify its global direction to global y-direction and from our calculated values and place the area load 

6. based on the sign of the applying load we will know whether the load is acting away from the member or towards the member then accordingly apply loads. based on the sign of the applying load we will know whether the load is acting away from the member or towards the member then accordingly apply loads

7. For this let us make use of frames, for frames we have to select frames from the model tab

8. the frames modeled can be accessed using the project browser.

9. From calculation we know after 10 m height the constants vary, so we can make use of the patch loading option available in the loading option.

10. similarly, we can do it for the wind loads in the remaining directions for the remaining faces.

11. validate the model after each step.

12. for a more specified view we can make use of seen content.

13. for the roof we have to create new load cases and apply the area load on the roof with the values calculated by selecting the type of load from the bottom box.

 RESULT:

Based on the  calculation done, we have applied  the wind  loadings on the faces of the model as well as for the roof 

 

 

 

 

3. On a separate model generate wind loading using wind wizard

AIM: To generate wind loading using wind wizard

TOOLS REQUIRED:

FILE

NEW

COLUMN

BEAM

MANAGE PROPERTY SET

SLAB

PROPERTY WINDOW

PROJECT BROWSER

GRID

CONSTRUCTION LEVEL

VALIDATE

SEEN CONTENT

WALL PANELS

ROOF PANELS

LOADS

LOAD CASES

AREA LOAD

WIND WIZARD

 

 

PROCEDURE:

1. Open the Tekla software and select a new option from the file menu.

2. Then draw construction levels heights and grid lines from the model tab according to the model.

3.Now select column icon from the model toolbar and locate beams according to plan and make use of manage property sets option for characteristics of beams, column

firstly model concrete column and then model steel column

4. then click on the beam option from the model icon and model beams.

5. we can make use of the property window for modifying properites using property window.

6.validate after each step

7.then design rafter beams option after selecting manage property set and selecting a particular property.

8.then model roof and wind panels from the icon present in the model toolbar.

9. now let us model the slab by selecting the slab option in the model toolbar.

10. select load cases option from the loading tab and add dead load and live load from the dialog box appearing

11. from the bottom menu select as dead load and apply dead load as per IS CODE.

12.similarly apply live load as per IS code.

13. Now let us select the wind wizard icon from the load toolbar 

14. a dialog box appears select data sources as worst-case data and some options are available select consider topography, consider cyclone effect. 

 

 15. then a table appears with some data already assigned from the model and we can assign or alter some properties, let us assign wind speed as 39, and we can change other 

data as well by simply clicking override calculation.

 

 

16.then it asks regarding terrain category let us select terrain with numerous closely spaced obstructions and assign a value for fetch distance as 5m  then click next

 

18. it asks for details regarding topography assign them and click next.

 

 19. after clicking next results are displaced

 

 then click next once again

 

 final results are displayed then simply click finish, we have successfully applied wind loads to the model.

 

 RESULTS: We have successfully applied wind loads to our model with the help of the wind wizard option which automatically calculates wind load by simply assigning values regarding topography or measurements to it

 the final output is

 

 and wind wizard option can be seen in the project window and can be accessed from there.