To calculate the dead , live and wind load for RC residential structure and to apply them using TSD

INTRODUCTION:

• Loads cases and load combinations are generated, assigned for the structure using tekla and validation of those loads is an important part of Tekla Structural Designer as it ensures a valid model for the analysis and design routines. 
• Imposed Loads are assigned according to IS 875 Part 2

Dead Load calculation

Finishes : 50mm x 24 KN/m^3 = 0.05 x 24 = 1.2 KN/m2

Brick wall width = 225mm

Unit weight = 20 KN/m^3

Floor height (Ground floor to First floor) = 5.2m

Brick wall loading for ground floor = 20 x 0.225 x 5.2 = 23.4KN/m

Floor height (First floor to roof ) = 6.8 m

Brick wall loading for first floor = 20 x 0.225 x 6.8 = 30.6KN/m

RCC Roof load = 25KN/m^3 x 0.15 m = 3.75 KN/m

Ceiling loading 0f 0.3KN per sq m

PROCEDURE :

• Generate load cases

• Generate load combinations 
• Now click on Load combinations in load tab
• Click on generate,

• Select dead load at the bottom
• Now select area load from panel load (Load tab)
• Select area load = 1.2KN/m2 in ground floor and first floor and apply it
• Ground floor :
• 
• First floor
• 
• Now to apply brick load to Groundfloor, Firstfloor
• Select "Full udl" in load tab and apply brick load = 23.6 for groundfloor and First floor = 30.4KN/m
• Groundfloor:
• 
• First floor:
• 

RESULTS :

2.AIM : To calculate liveload as per IS code and apply live load on the model

INTRODUCTION :

1. Loads cases and load combinations are generated, assigned for the structure using tekla and validation of those loads is an important part of Tekla Structural Designer as it ensures a valid model for the analysis and design routines. 
2. Imposed Loads are assigned according to IS 875 Part 2
3. Work areas without  machinery/equipments = 2.5KN/m^2
4. Work areas with machinery/equipments (Heavy) = 10KN/m^2
5. Staircase : 4KN/m^2
6. Toilets : 2KN/m^2
7. Canteen : 3KN/m^2
8. Store room : 2.4KN/m^2
9. Conference room : 4KN/m^2
10. Meeting room : 4KN/m^2
11. Office room : 4KN/m^2
12. Manager room : 4KN/m^2
13. Corridor : 4KN/m^2
14. Roof access not provided is taken as : 0.75KN/m2

PRODEDURE :

• Now click on imposed loads at bottom
• Select area load 
• Assign loads on the all  floors according to the IS 875part 2
• Ground floor:
• 
• First Floor:
• 

3. AIM : To generate wind load based on IS code

INTRODUCTION : Wind load is calculated as pe IS 875 part III

Wind load calculation :

• Wind speed taken as 50m/s

Terrain category is given as 2

• Vb = Basic wind speed which is given as 50m/s

Normally basic wind speed is selected from appendix A of code book IS 875 III which is given based on wind speed in various cities

• Design wind speed Vz= Vb*K1*K2*K3*K4

Where Vz depends on risk level, terrain roughness, height, size of structure, local topography

• K1 = Probability factor

It is taken from table 1 of IS 875 III

Life of structure is taken as 50 yrs and wind speed is given as 50m/s. Based on this K1 =1 

• K2 = Terrain, height, structure factor which is taken from table 2 = 1.05
• K3 = Topography factor which is taken as 1 
• K4 = Importane factor for cyclonic region K4 is taken as 1.15

Where K4 = 1.3 Structure for post cyclonic importance
               = 1.15 Industrial structure 
               =  1 All other structure

RESULT :

• Design wind speed Vz = Vb x K1 x K2 x K3 x K4 = 50 x 1 x 1.05 x 1 x 1.15 = 60.375m/s =60.4m/s
• Design wind pressure =  Pz = 0.6 x Vz^2 = 2188.8N/m2 = 2.188KN/m2 = 2.2KN/m2

4.AIM: To apply wind load on the model based on wind load calculations as per IS 875 part III

INTRODUCTION:

• Wind speed = 50m/s
• Life period = 50yrs
• Terrain category = 2
• Design wind speed Vz = Vb x K1 x K2 x K3 x K4 = 50 x 1 x 1.05 x 1 x 1.15 = 60.375m/s =60.4m/s
• Design wind pressure =  Pz = 0.6 x Vz^2 = 2188.8N/m2 = 2.188KN/m2 = 2.2KN/m2
• Length = 19.225, Width = 10.7m, Height = 16.88m
• L/W = 1.8 and H/W = 1.57
• External pressure coefficients for wall is taken from table 5 IS 875 III (H/W=1.57)

External Pressure Coefficients (Cpe) for Pitched Roofs of Rectangular Clad Buildings

PROCEDURE :

• select Load cases and add wind loads

Above calculated loads are applied on the model