Challenge

Week 2 Challenge

VVishnu Kumar31 Jul 2023

Week 2 Challenge

1. 1. How will you assign Circular section to column?
2. How will you assign Unit system to a .std model file?
3. What are the parameters to be specified while using “Bay Frame” option?
4. Name few codal standards incorporated in STAAD Pro software.
5. How will you specify the design compressive strength for a RCC section?

ANSWER:

1. How will you assign Circular section to column?

Select the member or go to properties select define, click circle option
Give the radius and material, Click 'add' it can be assigned
Properties > Define > Circle

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

Select the view tab and click display option
Now we can be assign the unit system
click View > Display options

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

Length, Height, Width of the frame
Number of bays along Length, Number of bays along Height, Number of bays Width

4. Name few codal standards incorporated in STAAD Pro software.

Euro code
ACI code
IS code

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

Go to Design tab change the current code
Select design parameters the dialog box is appeared
Now select Fc(compressive strength) and specify the value

2. 1. State the “Input” steps involved in RCC design.
2. Explain the difference between Fixed and Enforced support condition in STAADPro.

ANSWER:

1. State the “Input” steps involved in RCC design.

Geometry
Properties
Materials
Specification
Support
Loading and Load combination
Analysis
Design

2. Explain the difference between Fixed and Enforced support condition in STAADPro.

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.

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. The ones which have a stiff spring will end up having a negligible displacement, and those with zero-stiffness-springs will have a displacement based on the structure geometry, properties and loading.

3. 1. Explain the steps involved in analysis of a model using STAAD Pro sequentially.
2. Explain the two ways in which a structural framework/model can be created in STAAD Pro software.
3. Elaborate the different support conditions in STAAD Pro.
4. How will you extract the stress distribution for a staircase slab?
5. Explain the different ways to view SFD & BMD in STAAD Pro.

ANSWER:

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

Read/Study Drawing (Plan/Ele/Sec)
Input Geometry
Input Properties
Input (Specs/Constants/Support)
Input Load and Load combinations
Input Design Standards
Specify Analysis Type
Run Analysis
Verify Results
Design
Represent Design as document and drawing.

2. Explain the two ways in which a structural framework/model can be created in STAAD Pro software.

Node by node method
Structural wizard method

3. Elaborate the different support conditions in STAAD Pro.

Fixed
Pinned
Fixed but
Enforced
Enforced but
Multilinear spring
Foundation
Inclined
Tension/Compression Only Springs

4. How will you extract the stress distribution for a staircase slab?

Create the staircase by using nodes in the geometry panel
Aplly the support, loads and analysis
After analysis go to postprocessing and select load combination
Click on plate results and select plate stress contour
Check Max absolute stress and Major principle stress, MX

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

After the analysis click on post processing mode
Go to deflection command and click on beam result
Check SFD and BMD by click on the tool panel

Practical
1. Analyze the following structural elements and validate the results
A. 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

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

PROCEDURE:

A. 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

Step 1: Nodes, Properties, Materials

Open STAAD Pro software and create new file
Create the node point at a distance in node table
Right click on the mouse, a pop-up list is to be shown and select label option
Now the dialog appeared click the check box of Nodal numbers now the node numbers is showned in working space

Create a beam using beam table or Add beam option

Assign the beam size in property tab

Assign the material for beam in material tab

Step 3: Support, Loading

Click support tab there is an option Create click that the create support dialog is appear
One end support is pinned other end is roller support
Click that support and assign it

Now we applied the two load from each 5m at the support
So create the two nodes at 5m and 15m distance

Create the loads so click on the loading tab
Select load case details and click add option
Add dead load, live load, load combination

Now add the loads 50kN at each distance nodes

Assign the all loads

Step 3: Analysis, SFD, BMD

Go to analysis tab and select analysis command
The analysis/print command dialog box is appeared, select perform analysis option and click add button
Now select run analysis

After analysis select go to post processing mode option and click done
The SFD and BMD diagram is select to shown
Right click on the mouse, select label option and adjust the scale
Go to annotate option select the results what we want to display

SFD(Fy):

BMD(Mz):

Beam results with graph:

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

Step 1: Nodes, Properties, Materials

Create a new file and give it a name
Create nodes using grid or node table
Right click on the mouse select label option and select the check box node numbers