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

Analyze and design a steel building to 10T CRANE as per IS standard code in TEKLA STRUCTURAL DESIGNER. Refer the attached plan and elevation. Provide bracings and moment connection for lateral stability. 

Consider dead, live, equipment and wind loading. Consider the brick wall loading for 150mm thick and 1.5 KN per sq m for wall and roof cladding.

Assume wind loading basic speed as 39m/s

Report of each member to be generated and extract drawings of structural plans from the software

AIM:

• To analyze and design a steel building as per IS standard code

 

GIVEN DATA:-

• Assuming the wind speed as 39 m/s
• Thickness of the wall as 150mm
• Wall and roof loading to be considered as 1.5 kN/m^2
• Live loads and equipment loads should be assumed as per IS 875 part 2
• Wind load calculated as per IS 875 part 3

 

 

PROCEDURE:

 

Step 1:- To model the structure

• To define construction levels
• Click on the construction levels icon in the model toolbar
• Define the levels as per the details given in cross section

• To define gridlines
• Click on gridlines icon in the model toolbar
• Specify the first point and draw the first grid line
• Then select parallel quick option and draw all other gridlines by specifying the distance

 

• To add supports to the column base
• To add concrete pedestals to the column base
• Go to manage property sets from the home toolbar
• Click on new> concrete column
• Modify the properties of the concrete column and click on ok
• Now go to model>click on column>  precast
• Select the column properties from the properties dialogue box
• Assign them to the column base

• To assign steel columns
• Go to manage property sets>new> steel column
• Now select the cross section of the steel column
• Add columns to the model

• To model beams
• Define the properties of the beam in manage property sets
• Assign them to the model

Beam layout in ground floor level

Beam layout in first floor level

 

 

 Beam layout in roof beam level

 

 Structure with beams, columns and rafter beams

• To add bracing to the wall and roof
• Go to manage property sets > new> steel brace
• Select the section of the brace element
• Go to model >click on brace
• Then add bracing to the model

• Roof bracing are added in 3d view

• To add slab panels to the model
• Check whether the slab is one way or two way
• Then go to manage property sets>slabs
• Select the grade of the concrete and define the depth of the slab panel
• Then assign the slab panels to the model
• Slab panels at ground floor level

• Slab panel at first floor level

• Slab panel at roof beam level

• To add wall panels and roof panels to the model

• To add load cases

 

LOAD CALCULATIONS

Calculation of brick wall load

• Assume the unit weight of the brick as 20 kN/m^3
• Height of the brick wall is 5m
• Thickness of the brick wall is 150mm
• Load of brick wall is 20 x 5 x 0.15 = 15 kN/m
• Brick wall load on first floor beam is 7 x 20 x 0.15 = 21 kN/m

Calculation of floor finishes

• Assume the thickness of the floor finishes as 50mm
• Unit weight of the floor finishes is assumed as 24 kN/m^3
• Floor finishes load is 0.05 x 24 =1.2 kN/m^2

Calculation of imposed loads

Imposed loads are considered as per IS 875 part 2 based on occupancy

Calculation of wind loads(as per IS 875 part 3)

• Basic wind speed is considered as 39 m/s
• Assume the design life of the structure as 50 years
• Terrain category as 2
• Design wind speed

• K1 probability factor is assumed as 1 (as per IS 5.3.1)
• K2 terrain and height factor is assumed as 1
• K3 topography factor is assumed as 1 (for slope of structure greater than 3)
• K4 importance factor for industrial building is taken as 1.15

Design wind speed Vz = 39 x 1 x 1 x 1.15 x 1

Design wind speed = 44.85

• Design wind pressure Pz =0.6 x 44.85^2
• Design wind pressure 1206.9 N/m^2= 1.2 kN/m
• Total length of the building is 90m
• Width of the structure is 38m
• Height of the structure is 12.5m
• Ratio of wall and roof co efficient
• l/w = 90/38 = 2.36
• h/w = 12.5/38 =0.328

Wind load calculations( +Y direction face A )

                                                          +Cpi                       -Cpi

External pressure coefficient                       0.7                     0.7

Internal pressure coefficient                        0.7                    -0.7

Net pressure coefficient                               0                       1.4

Design wind pressure                                  1.2                     1.2

Loading to be applied on the wall                0                      1.75

 

Wind load calculations( +Y  direction face B )

                                                              +Cpi                     -Cpi

External pressure coefficient                     - 0.25                  -0.25

Internal pressure coefficient                        0.7                     -0.7

Net pressure coefficient                             -0.95                    0.45

Design wind pressure                                  1.2                      1.2

Loading to be applied on the wall             -1.187                 0.562

 

Wind load calculations( +X direction face C )

                                                              +Cpi                     -Cpi

External pressure coefficient                   - 0.6                    -0.6

Internal pressure coefficient                     0.7                      -0.7

Net pressure coefficient                            1.3                       0.1

Design wind pressure                               1.2                       1.2

Loading to be applied on the wall          -1.625.                  0.125

 

Wind load calculations( +X direction face D )

                                                              +Cpi                     -Cpi

External pressure coefficient                    - 0.6                     -0.6

Internal pressure coefficient                       0.7                     -0.7

Net pressure coefficient                            -1.3                       0.1

Design wind pressure                                1.2                       1.2

Loading to be applied on the wall             -1.625.                  0.132

 

Roof load calculations

 

Wind load calculations( +y direction face EF )

                                                                 +Cpi                    -Cpi

External pressure coefficient                    - 0.4                       -0.4

Internal pressure coefficient                       0.7                       -0.7

Net pressure coefficient                             -1.1                       0.3

Design wind pressure                                 1.2                       1.2

Loading to be applied on the wall             -1.375.                   0.375

 

Wind load calculations( +y direction face GH )

                                                              +Cpi                     -Cpi

External pressure coefficient                   - 0.4                       -0.4

Internal pressure coefficient                      0.7                       -0.7

Net pressure coefficient                            -1.1                       0.3

Design wind pressure                                1.2                        1.2

Loading to be applied on the wall             -1.375.                   0.375

 

Crane load calculations:-

• Crane capacity =100kn
• Weight of the crab = 35kn
• Weight of the crane = 160kn
• Max hook approach = 1m
• Wheel base= 3m
• Distance  between c/c gantry rails =20m
• Distance between c/c gantry columns= 6m
• Max point load on the crane = 100 +35= 135
• Self weight of the crane = 160/2 = 80

 

 

TO ASSIGN LOADS TO THE MODEL

• Brick wall loading and live load on floor assigned on ground floor

• Brick wall loading and live load on floor assigned on first floor

• For 18 degrees pitched metal roof
• Imposed load on the roof is 1.5

To assign wind loads

• Wind loads assigned on roof top

• After assigning all the loads
• Validate the model and run the analysis
• Before analysing the model check the modifications of the first order linear Analysis from the setting toolbar
• Then go to analysis toolbar and click on analyze

 

• After the analysis is done we can view the failure criteria of the structure

RESULTS:

• The structure is modelled and analyzed and designed for all the load combinations