Week 2 Challenge

1. How will you assign Circular section to column?

Answer:

• Go to property -> define and give the diameter of the column-> click add.
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• Then select the property and assign it by assign by assignment method

2. How will you assign Unit system to a .std model file?

Answer:

1. It can be assigned at the initial stage when starting the model

2. Type units in search -> select set current input units and select the units -> apply.

3.What are the parameters to be specified while using “Bay Frame” option?

Answer:

• The following parameters have to be enter while using “Bay Frame” option
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4.Name few codal standards incorporated in STAAD Pro software.

Answer:

Some of the codal standards incorporated in STAAD Pro software are,

• IS codes
• CAN/CSA codes
• BS CODES
• American standard codes
• Euro codes, etc

5. How will you specify the design compressive strength for a RCC section?

Answer:

• Go to design tab -> select concrete and design code as IS 456.
• In whole structure window -> select define parameters -> select FC
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3.1. State the “Input” steps involved in RCC design.

Answer:

Model info:

• Open the model by giving name and selecting the units
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• Once the model is open, the RCC structure can be designed by picking the following tab one by one.
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• Geometry:
• Click the tab and create nodes
• With the help of nodes create the beams and columns as physical model of the structure.
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• Properties:
• Select this tab to define a structure by its shape, thickness,etc
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• Material:
• In this tab type of the material to be used can be selected as shown below
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• Specification:
• If a structure needs to be assigned for any specification for plates or beams it can be done here
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• Supports:
• In this tab different types of support the structure needs can be added and then be assigned by assignment method.
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• Loading:
• In this tab, the different types of load case and combination can be assigned to the structure.
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• Analysis:
• Here, the structure can be analyzed by giving the command perform analysis.
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• Design:
• The structure can be designed with the by its compressive strength and yield strength as per the design code
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• Result of design the simple RCC structure
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3. Explain the difference between Fixed and Enforced support condition in STAADPro.

• Fixed support condition:
• When the FIXED type of support is specified, for those degrees of freedom which are to be treated as fully restrained, STAAD assumes the displacements to be known quantities whose value is zero.
• Hence, those degrees of freedom are not considered for the stiffness matrix, and their value is not calculated. 
• Enforced support condition:
• When the ENFORCED type of support is specified, for those degrees of freedom which are to be treated as restrained, STAAD assigns a spring with a very high spring stiffness - translational stiff springs for translational restraints, and rotational stiff springs for rotational restraints.
• Those degrees of freedom which are free to displace are assigned springs of zero stiffness.
• Hence, for all the 6 degrees of freedom at such supports, the displacements are calculated

3.1.Explain the steps involved in analysis of a model using STAAD Pro sequentially.

• After creating geometry, property, material, support the model can be analyzed by giving command called perform analysis
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• Click run analysis by saving the model
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• Select Go to post processing mode -> Done

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• Select the load case type need to included
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• Finally, analyzed results will be checked
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2. Explain the two ways in which a structural framework/model can be created in STAAD Pro software.

Answer:

The two ways in which a structural framework/model can be created in STAAD Pro software are,

• Node by node method
• Structural wizard method
• Node by node method is by adding node by coordinate method. Add node coordinate at data area.This method is used for big and complex structure.
• Snap and grid method. Select Beam Grid option from Geometry -> Grid.
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• The structure wizard is used to create standard structural models from parametric input. To launch the structure wizard, click the Add Model from Template tool in the Create group on the Model ribbon tab. The STAAD.Pro Physical Modeler Structure Wizard window opens.
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3. Elaborate the different support conditions in STAAD Pro.

The different support conditions in STAAD Pro. are,

• Fixed support condition:
• When the FIXED and FIXED BUT type of support is specified, for those degrees of freedom which are to be treated as fully restrained, STAAD assumes the displacements to be known quantities whose value is zero.
• Hence, those degrees of freedom are not considered for the stiffness matrix, and their value is not calculated. 
• 
• Enforced support condition:
• When the ENFORCED and ENFORCED BUT type of support is specified, for those degrees of freedom which are to be treated as restrained, STAAD assigns a spring with a very high spring stiffness - translational stiff springs for translational restraints, and rotational stiff springs for rotational restraints.
• Those degrees of freedom which are free to displace are assigned springs of zero stiffness.
• Hence, for all the 6 degrees of freedom at such supports, the displacements are calculated.
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• Pinned support:
• Pinned support connection will not restrain any rotation thus there is no end moment.
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4. How will you extract the stress distribution for a staircase slab?

• Create node for stairs to be modeled
• Assign the slab as plate element by add plate icon
• Assign property, material and supports to it
• Create mess on plate element.
• Create load cases and load combination and assign to it.
• Then analysis the model.
• After analysis go to define parameter and design the model
• Run the analysis again select Go to post processing mode -> plate result option -> stress distribution result -> select appropriate stress distribution
• The results can be viewed in color variation form with respect to the stress distribution

5. Explain the different ways to view SFD & BMD in STAAD Pro.

• Go to results tab -> and select FY for shear force and MZ for bending moment
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• Go to layout drop down and select graph under beam results to view the SFD and BMD in graph format
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Aim:

• To analyze the following structural elements and validate the results
  Simply Supported Beam
             a. A Simply supported beam with two-point loads symmetrically placed
             b. Span L = 20m
             c. Load P = 50kN each
             d. Both P located at 5m from each support

Procedure:

• Open the new file under metric unit.
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• Under geometry tab enter node 1 as 0 in nodal table
• Enter node 2 as 20m in X
• Right click and select add beam and join the nodes
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• Go to property tab, select define and create the following column size and assign it
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• In material tab select concrete and assign it to the beam
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• Go to support tab -> click create and create pinned and roller support for simply supported beam
• Assign it to the ends
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• Go to geometry and click insert node
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• Go to loading tab and create DL and LL as load case
• For DL add self-weight and for LL add -50KN as point in the form of nodal load
• Assign it to the beam
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• Go to utilities -> command file -> edit STAAD SPACE to STAAD plane
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• Go to analysis tab -> click analysis command -> add to enter perform analysis in command as shown below
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• Go to analysis tab -> click run analysis -> go to post processing mode
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• Click done
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• Click ok
• Then the results will be displayed
• Go to annotate setting to view the value
• Result:
• Shear force:
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• Bending moment:
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• Displacement:
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Aim:

To analyze the following structural elements and validate the results

B.Fixed Beam
           a. Span L = 16m
           b. Uniformly Distributed Load w=9kN/m

Procedure:

• Open the new file under metric unit.
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• Under geometry tab enter node 1 as 0 in nodal table
• Enter node 2 as 16m in X
• Right click and select add beam and join the nodes
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• Go to property tab, select define and create the following column size and assign it
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• In material tab select concrete and assign it to the beam
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• Go to support tab -> click create fixed support
• Assign it to the ends
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• Go to loading tab and create DL and LL as load case
• For DL add self-weight and for LL add -9KN/m as point in the form of UDL
• Assign it to the beam
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• Go to utilities -> command file -> edit STAAD SPACE to STAAD plan
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• Go to analysis tab -> click analysis command -> add to enter perform analysis in command as shown below
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• Go to analysis tab -> click run analysis -> go to post processing mode
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• Click done
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• Click ok
• Then the results will be displayed.
• Go to annotate to view the value
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• Result:
• Displacement:
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• Shear force:
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• Bending moment:
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