To calculate wind load for industrial steel structures and to apply it by using TSD
Q1
Aim:- to calculate the wind loading for the given data
- calculate extenal pressure coefficients
- calculate internal pressure coefficients
- net pressure coefficients
- design pressure for wall
- wind loading to be applied on the wall panel
Given data:-
- basic wind speed is 39m/s
- terrain category is 2
- probable design life of the building is 50years
- greater horizontal dimension (length)= 24
- lesser horizontal dimension (width)= 18
- height of the building = 14
Ratio of wall and roof coefficeints:-
- l/w =24/18= 1.33 (wall)
- h/w = 14/18 = 0.78 (roof)
Wind pressure coefficients:-
- risk coefficient K1 = 1
- terrain factor and size factor K2 = 1
- topography coefficient K3 = 1(for 50 years)
- important factor for cyclonic K4 = 1.15
calculation of wind speed:-
- design wind speed Vz= Vb x K1 x K2 x K3 x K4
Vz= 39 x 1 x 1 x 1 x 1.15= 44.85
- design wind pressure Pz=0.6 Vz^2
Pz= 0.6 x 44.85^2 =1206.91 N/m^2
Pz =1.206 kN/m^2
Wall loading calculations:-
wind load along Y direction(face A)
+Cpi -Cpi
height at different level= upto 10m upto 10m
external pressure coefficient Cpe 0.7 0.7
internal pressure coefficient Cpi 0.5 -0.5
net pressure coefficient Cp 0.2 0.12
design wind pressure 1.207 1.207
wind load to be applied 0.241 1.448
factor x loading 0.253 1.52
wind load along Y direction(face B)
+Cpi -Cpi
height at different level= upto 10m upto 10m
external pressure coefficient Cpe -0.25 -0.25
internal pressure coefficient Cpi 0.5 -0.5
net pressure coefficient Cp -0.75 0.25
design wind pressure 1.207 1.207
wind load to be applied -0.905 0.302
factor x loading -0.95 0.32
wind load along Y direction(face C and D)
+Cpi -Cpi
height at different level= upto 10m upto 10m
external pressure coefficient Cpe -0.6 -0.6
internal pressure coefficient Cpi 0.5 -0.5
net pressure coefficient Cp -1.1 -0.1
design wind pressure 1.207 1.207
wind load to be applied -1.328 -0.12
factor x loading -1.4 -0.13
wind load along Y (-) direction
+Cpi (h/w =0.78) -Cpi (h/w =0.78)
external pressure coefficient Cpe -0.88 -0.4 -0.88 -0.4
internal pressure coefficient Cpi 0.5 0.5 -0.5 -0.5
net pressure coefficient Cp -1.38 -0.9 -0.38 0.1
design wind pressure 1.207 1.207 1.207 1.207
wind load along X direction(along EG)
+Cpi -Cpi
height at different level= upto 10m upto 10m
external pressure coefficient Cpe -0.76 -0.76
internal pressure coefficient Cpi 0.5 -0.5
net pressure coefficient Cp -1.26 -0.26
design wind pressure 1.207 1.207
wind load to be applied -1.52 -0.314
factor x loading -1.596 -0.33
wind load along X direction(along FH)
+Cpi -Cpi
height at different level= upto 10m upto 10m
external pressure coefficient Cpe 0 0
internal pressure coefficient Cpi 0.5 -0.5
net pressure coefficient Cp -0.5 0.5
design wind pressure 1.207 1.207
wind load to be applied -0.6 0.6
factor x loading -0.63 0.63
Result:- the wind loading to be applied on each face is calculated
Q2
Aim:- to assign the above calculated wind loading to the model
- click on load>loadcases
- add all the wind load combinations as per the direction of wind and coefficient of pressure
- assign the loads to the model according to the standards of IS 875 part 3 as per the wind load values calculated above
RESULT:- all the wind loads calculated are assigned on the model as per the standards of IS 875 part 3
Q3
AIM:- to generate the wind loads using wind wizard from tekla structures
- open the model
- with all the member properties assigned
- load cases and load combinations generated
- with assignes wall panels, roof panels and slab panels
- assign the floor finishes and live loads considered
- now open the wind wizard
- click on worst case data
- click on next
- edit the data as per the question
- select the terrain as 2
- basic wind speed as 39
- category of the building as industrial building
- add the properties of the building
RESULTS:- the results of wind pressures are obtained by the wind wizards