Challenge

Project 1_Analyze and design a steel building to 10T CRANE as per IS standard code using TEKLA STRUCTURAL DESIGNER.

BBhagyashri Marodkar23 Apr 2022

Tekla Structural Designer

Aim - To analyze and design a steel building to 10T crane as per IS standard codeusing Tekla structural Designer

Procedure -

Initially open the Tekla Structural Designer Software
Click on New option to create new model
Using Grid lines and Quick parallel grid line option horizontal grids and vertical grids was drawn.

In the model toolbar select construction level dialogue box
Construction level dialogue box appears and name each level as Base,Ground floor,First floor,Roof floor and Roof top and also assigned the height to each level.

Now to add pedestal columns in gthe Home menu click on Manage Property setd option and the manage property sets dialogue box appear
Click on New followed by members ans select concrete column
Rename it as PD1 and also apply properties

Now using column option in the ribbon tab under model menu,Column was placed at locations as required.Column was placed at base floor upto ground floor

Similarly,creats steel column under manage property sets option
Rename it as C1 and also apply properties

Now using column option in the ribbon tab under the model menu column was placed at locations as required.Column wa placed at Ground floor upto Roof floor

Similarly,create beam under manage property setd option

Now using beam option in the ribbon tab under the model menu beams was placed at locations as required
Beams at Ground level

Beam at first floor

Beam at Roof floor

Rafter beam was designed using manage property set option,Click on New followed by members and select steel beam
Rename it as Rafter and apply properties

Now Rafter beam was applied using the beam option in the ribbon tab under the model menu and beams was placed at locations as required
Both the ends of Rafter was set fully fixed

Steel bracing was designed next for that click on manage property sets option and manage property sets dialogue box appear.Click on new followed by members and select Steel Brace .
Reanme it as Bracing and apply properties
Also select section size of ISA 75X75X8 for designing

Now steel brace were applied using the brace option in the ribbon tab under the model menu and braces was placed at locations by selecting opposite corners points.then select X brace option and drawn

Slab properties was designed using manage property sets option,in that select new followed by members and select slabs followed by general slab item and apply properties
Now using the slab on beam option in model menu the slabs was applied on all floors
Slab on Ground floor

Slab on First floor

Slab on Roof floor

Wall panel and Roof panel was applied using wall panel option and roof panel option from model menu
3D view of wall panel and Roof pane

Load Calculations -

Initially based on IS 875 part 1, all the dead load in the steel structures were calculated as follows

1) Unit weight of concrete = 24

2) Finish load = 0.05*24 = 1.2

3) Brick wall loading = 0.15*20*5 = 15 kn/m

4) Brick wall loading = 0.15*20*7 = 21 kn/m

5) Brick wall loading (roof floor to roof top ) = 0.15*20*4.8 =14.4 kn/m

6) Roof loading on purlins = 1.5 kn/m

7) Ceiling loading = 0.3 kn/m

On the load tab click on load cases option at the top left corner to open the loading dialogue box

In order to add new loading like imposed,wind,seismic and crane load .click on add option in loading dialogue box and add them and select type from the drop down list

For applying dead load first select dead load option from the drop down list at the bottom left side
Open 2d view ground floor of the level within which you want to apply load
In the loading list,select an appropriate load case
In the Load tab,click on Area load
In the property windows,adjust the load details according to need and click on that panel which you want to apply
Load was applied in all floors and roofs

For Roof load was applied as Full UDL

Wind Load Calculations -

Crane Load Calculations -

Maximum concentrated load on crane = 100+35 =135 kn

Self-weight of crane will act as uniformly distributed load of intensity = 160/20 = 8 KN/M

Taking moment about B-

Ra x 20-(135) x (20 x 10) =0

20Ra = 297000

Ra = 208.25 KN

Taking moment about A -

Rb x 20-(135)x(1-8)(20x10) = 0

20Rb = 189000

Rb = 86.75 KN

Ra+Rb = 100KN

The reaction from crane girder is distributed equally on two wheels at the end of the crane girder

Maximum wheel load on each of the crane wheel = 208.25/2 = 104.125 KN

Maximum Bending Moment -

Assume self weight the the gantry girder as 1.5 KN/m

Total dead load = (self weight of rail+self weight of gantry girder) 0.3+1.5 = 1.8 KN/m

Taking Moment about D -

Rc x6 -104.125x(20.25+3)-104.125x2.25 =0

6Rc = 2655.187

Rc = 24655.187/6

Rc = 130.15 KN

Taking Moment about C -

Rd x6-104.125 x(0.75+3)-104.125 x0.75 =0

Rd x6 = 468.56

Rd = 468.56/6

Rd = 78.09 KN

Bending moment under wheel due to live load = Rd x2 = 78.09 x 2 = 156.18 KNm

Bending moment due to impact = 0.10 x 156.18 ( 10% increase due to MOT) = 15.618 KNm

Total bending moment due to live load and impact load = 156.18 + 15.618 = 171.798 KNm

Bending moment due to dead load = Wl *l/2 =1.8 x 6 x 6/2 = 8.1 KNm

Maximum bending moment = 171.798 + 8.1 = 179.89 KNm

Maximum Shear Force -

For maximum shear force

Rc x 6-104.125 x6-104.125 x3 = 0

Rc = 937.125/6

Rc = 156.18 KN

The maximum shear force due to wheel load = 156.18 KN

Lateral forces -

Lateral forces traverse to rails = 5% of the weight of crab and weight lifted

= 0.05 (135) = 6.75 KN

Lateral forces on each side of wheel F1 = 6.75/2 = 3.375 KN

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

= 3.375 x (130.15/104.125) = 4.21 KN

At D -

=3.375 x (78.09/104.125) = 2.53 KN

4.21+2.54 = 6.74 kn

Bending moment due to lateral load by proportion = 3.375 x (15.18 / 104.125) = 5.06 KNm

Now ceate new wind load with both +Cpi and -Cpi values using wind wizard option under load tab
Also add seismic load at last
Analyze the structrure and do necessary changes to correct the errors