To calculate dead and live load for industrial steel structures and to apply them using TSD
1.Calculate dead load in design report based on IS code and apply dead load on the model
- Finishes of 50mm
- Slab as per design
- Brickwall 150mm thickness
- Roofing load based on purlin size
- Ceiling loading 0f 0.3KN per sq m
Aim:
To Calculate dead load in design report based on IS code and apply dead load on the model
Procedure:
Load calculations:
• Dead Load = 1.2 KN/M^2
• Finishes = 500mmx24 KN/M^2
• Brick wall load = 0.15x20x5.2=15.6KN/M^2
(Ground to first floor)
• Brick wall load =0.15x20x6.8=20.5 KN/M^2
(second floor to Roof )
• Brick wall load =0.15x20x4.8=14.5 KN/M^2
(Roof to top floor)
• Roof load =1.5KN/M
• ceiling load=0.3KN/M
Now open Tekla structural designer software
Open file where we have created a steel structure
Now go-to model tab and select slabs on beams option as shown
Now add slabs to each floor as shown
Now go to the load tab and select load cases
Now we get a window named as loading as shown
Now add required loads in this window
Now add required loads in this window
Now Goto load tab and select combinations
Now we get a window named as loading as shown
Now click on combinations and add required combinations as shown below
Now select the level where we want to apply the loads Now select the loads as required at the bottom left corner
Type here to search
Now go to the load tab and select the
Area to apply load on the slab
Now we can see the Area load applied on the slab
Now select the level where we want to apply the loads
Now select the loads as required at the bottom left corner
Now go to the load tab and select the UDL to apply load on the brick wall
Now we can see the UDL applied on the brick wall
Finally, apply loads on the Roof
Result:
Calculation of dead load in design report based on IS code and application of dead load on the model is done.
2.Calculate live load in design report based on IS code and apply live load on the model
- Assume the loading based on IS 875
- Roof loading
- Consider equipment loading as 5KN per sq m
Aim: To Calculate live load in design report based on IS code and apply live load on the model
Procedure:
Based on the IS 875 the live loads are applied, as follows.
• Workshop = 5KN/M^2
• Staircase =5KN/M^2
• Corridor = 5KN/M^2
• Meeting Room = 5KN/M^2
• Store Room =5KN/M^2
• Toilet = 2KN/M^2
Canteen = 3KN/M^2
Office Room = 3 KN/M^2
• Conference Room = 5KN/M^2
• Equipment Room = 10KN/M^2
• Rest Room = 2 KN/M^2
• Administration Room = 5KN/M^2
The Live loads are applied for all the floors, as shown below
Now select the level where we want to apply the loads
Now select the loads as required at the bottom left corner
Type here to search
Now go to the load tab and select the Area to apply load on the slab
Now we can see the Area load applied on the slab
Result:
Calculation of live load in design report based on IS code and application of liveload on the model is done
3. Generate a calculation for 5T crane loading based on following inputs
• Centre to Centre of wheel = 10m
• Weight of crab = 40 KN
• Number of wheels = 4
• Wheel base = 2m
AIM: To generate ca calculation for 5T Crane loading
INTRODUCTION:
Industrial buildings generally have cranes which run on rails which is supported by the building structure. Three main loads are considered such as vertical loads (Wheel loads), Lateral loads and Longitudinal forces
PROCEDURE & RESULTS:
Crane load = 50KN
span of crane girder c-c = 14 m
span of gantry girder c-c = 5.5 m
lateral span of girder = 5.5 m
Weight of crab = 40KN
Total number of wheels= 4
Wheel base = 2m
Selfweight of rail section = 300 N/m
Selfweight of gantry girder = 1500 N/m
Yield stress of steel = 250 N/m2
Maximum concentrated load = 90KN =Maximum wheel load
Self weight of crane will act as uniformly distributed load of intensity = 50/14 = 3.5714 KN/m
Calculating RA and RB
RA(14) (90X13)-3.5714X14X7
RA = 58.57KN
RB(14) - (90 * 1) - (3.5714 * 14 * 7)
RB = 31.418KN
The reaction from the crane girder is distributed equally on 2 wheels at the end of the crane
Maximum wheel load on each wheel of crane = 58.5/2 = 29.25 assume 30KN
Calculating RC and RD
RC(5.5) - 30(2.75 + 2.25) - 30(2.75 - 0.75)
RC = 38.18KN
RD * 5.5 - 30(0.75 + 2.75) - 30(0.5)
RD = 21.81KN
BM Under wheel due to live load = RD X 2
= 43.62 KNM
BM Due to impact = 0.1 x 43.62 = 4.362 KNM
Total BM due to live load and impact load = 43.62 + 4.362 = 47.982KNm
Total dead load = Selfweight of rail section +Selfweight of gantry girder = 1.8KN/m
BM due to dead load = wi^2/2
= (1.8x5,5^2)/2 = 6.806KNM
Maximum BM= 47.982 + 6.806 = 54.788 KNM
Maximum shear force due to wheel load =RCX5.5-30X5.5-30X2.5 = 43.63KN
Lateral forces transverse to rails = 5% of the weight of crab and weight lifted
= 0.05(40+10) = 2.5KN
Lateral force on each wheel = 2.5/2 =1.25KN
Maximum horizontal reaction due to lateral force by proportion at C = Lateral force x (Reaction at c due to vertical load/Maximum wheel load due to vertical load)
= 1.25x (38.18/30) = 1,59 = 1.6KN
At D = 2.5-1.6=0.9KN
BM Due to lateral load by proportion = (1.25/30)x43.63 = 1.817 KNM