Week 2 Challenge

Q1]

AIM:-

1. To assign Circular section to column

2. To assign Unit system to a .std model file

3. Parameters to be specified while using “Bay Frame” option

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

5. To specify the design compressive strength for a RCC section.

PROCEDURE: -

(1)

Go to the Properties Tab

Click on Define

Property dialogue box opens

Select Circle

Give Dia of the Column and choose Material.

Click on Add and close

Assign the property to the view.

(2)

Click on View Tab

Go to Options pallette

Select Display Option

Options dialogue box opens

Check the types of units.

(3)

Click on Geometry tab

Go to Structure Palette

Select Strucutre Wizard

Default.stp dialogue box opens

Change the model Type: Bay Frame

Open the Bay Frame

Here we see the Parameters

Length

Height

Width

No of bays along height

No. of bays along length

No of bays along width

(4)

Click on Analysis and Design Tab

Go to Design Commands

Selec the required Material

Design-Whole Structure dialogue box opens

Select the required Code.

Indian Codal standards are:

IS 456-2000

IS 13920-2016

IS 875-1987

IS 800-2007

IS 1893-2016

(5)

Click on Design tab

Select Define Parameters

Design Parameters dialogue box opens

Click on FC and Input the Compressive strength of the concrete.

RESULT: -

1. Explained how to assign Circular section to column

2. Explained how to assign Unit system to a .std model file

3. Explained parameters to be specified while using “Bay Frame” option

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

5. Explained how to specify the design compressive strength for a RCC section.

Q2]

AIM: -

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

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

PROCEDURE: -

(1)

Input Geometry

Input Properties

Input Specs/constants/Supports

Input Loads and load Combinations

Input Design Standards

Specify Analysis Type

Analyse the Models

Select on Design Tab

Select IS code 456

Give Compressive strength of comprete

Run the analysis

Verify Results

Design

(2)

FIXED SUPPORT: -

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: -

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.

RESULT: -

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

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

(Q3)

AIM: -

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. Extract the stress distribution for a staircase slab

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

PROCEDURE: -

(1)

Go to the Analysis Tab.

Select Define Commands.

Analysis/Print Commands dialogue box opens.

Click on Performed Analysis.

Click on add and close.

In the Analysis and Design Tab

Under Analysis palette

Click on Run Analysis.

Save the File.

STAAD Analysis and Design dialogue box opens

Check any Errors.

Resolve If Any Errors using Commands and Put Plane as space.

(2)

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

• Node by Node method.
• Structure wizard method.

NODE-BY-NODE:

In this method we assign the nodes as per the architectural drawings that are placed manually by placing the co-ordinates.

We can assign the nodes to our building by using the geometry panel.

These nodes can be transitionally repeated based on the building dimensions and the levels.

STRUCTURE WIZARD:

This method is an automated method as compared to the node-by-node method.

We can create truss, frame and other structures just by using this method.

(3)

• Fixed
• Pinned
• Fixed But
• Enforced
• Enforced But
• Multilinear spring
• Foundation
• Inclined
• Tension/Compression only springs

FIXED SUPPORT CONDITION:

• Fixed support are restrained in all six degree of freedom ie FX,FY,FZ,MX,MY and MZ.

PINNED SUPPORT CONDITION:

• Pinned support are restrained against translation i.e FX,FY and FZ but can rotate freely i.e MX,MY and MZ.

ENFORCED SUPPORT CONDITION:

• Enforced support are also restrained in all six degrees of freedom but It contains spring constant.

(4)

Create the staircase by using the nodes in the geometry panel.

Run the analysis

After Analysis

Go to the Postprocessing

Select Load Combination

Click on Plate Results.

DIAGRAMS dialogue box opens

Select Plate Sress Contour

Select Load Case.

Select Stress Type

Check Max Absolute Stress

Check Major Principle Stress

(5)

After Analysis

Click on RESULTS Tab

Go to View Results Palette

Check SFD and BMD by Click on SFD and BMD tool.

Click on RESULTS Tab

Go to View Results Palette

Click on Layout

Click on Graph to view SFD and BMD

RESULT: -

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

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

3. Elaborated the different support conditions in STAAD Pro.

4. Extracted the stress distribution for a staircase slab

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

PRACTICAL

AIM: -

Analyze the structural elements and validate the results

A. Simply Supported Beam

B.Fixed Beam

PROCEDURE: -

(A)

GIVEN DATA

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

Open STAAD.Pro software.

select New < Model Info.

make appropriate File name, Location, Units.

Select Create to go the Workspace and create a STAAD model.

Click on GEOMETRY TAB

In Structure Pallette,Select Grids and choose Beam Grid

Enter the data to create Nodes in Nodes Column

Node 1 : X=0, Y=0

Node 2: X=20, Y=0

we can see that Two nodes are created at the distance of 20m.

Open the new STADD.Pro file

Create the nodes in geometry tab as per the question

Go to geomerty tab select add beam and draw the beam by using beam cursor

Click on PROPERTIES

Properties dialogue box opens

Click on Define

Add the Section here

Select Rectangle and fill the data required.

YD= 0.23m, ZD=0.23m, Material = Concrete and

click Add.

Select the created beam and assign the rectangular property to the beam

Select Materials, from the Material Tab and assign it to the created beam.

It can be checked by selecting the Concrete Title, then we can see that the created beam lines will be highlighted.

Select SUPPORTS TAB

Supports-Whole Structure dialogue box opens

Click on create option

For Roller support, click Create

select Fixed But and Release FX and MZ

click Add.

Then to assign Support at the two ends of beam,

Select Use Cursor to Assign option to assign the supports.

As per the question load P is located at 5m from each support

Go to geometry tab and add nodes at 5m and 15m

click Load Cases < Add < Add New : Load Cases.

Add New: Load Case dialogue box opens.

select Primary

Number = 1, Loading Type =Dead, Title = DL.

Select Dead Load(DL)

click Add < Selfweight < Selfweight Load < Direction = Y, Factor = -1.

Click on Load & Definition Tab

click Load Cases < Add < Add New : Load Cases.

Add New: Load Case dialogue box opens.

select Primary

Number = 1, Loading Type =Dead, Title = DL.

Click on Load & Definition Tab

click Load Cases < Add < Add New : Load Cases.

Add New: Load Case dialogue box opens.

select Primary

Number = 2, Loading Type =Live, Title = LL.

select Define Combination

Number = 3,

Name: Combination oad Case 3

Factor: 1.5

Select Live Load (LL)

click Add < Member Load < Concentrated Force < P = -50, d1 = 5m, Direction = GY.

click Add < Member Load < Concentrated Force < P = -50, d1 = 15m, Direction = GY.

Select Use Cursor to Assign option to assign the Loads.

Select the Load and asssign the load to the beam.

Click on ANALYSIS TAB

Analysis-Whole Structure dialogue box opens

Click on Define Commands

Analysis/Print Commands dialogue box opens

Select Perform Analysis

Print options : No print and

click Add.

After adding Analysis/print command, click Run analysis.

Then we should get the Analysed model with 0 Errors

select Go to post proccessing Mode and click Done.

Click on RESULTS Tab

Go to View Results Palette

Check SFD and BMD by Click on SFD and BMD tool.

To view SFD of the model select FY icon present at the toolbar.

To view SFD of the model select Mz icon present at the toolbar.

Click on RESULTS Tab

Go to View Results Palette

Click on Layout

Click on Graph to view SFD and BMD

(B)

Given Data:

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

Open the new STADD.Pro file

Create the nodes in geometry tab as per the question

Click on GEOMETRY TAB

In Structure Pallette,Select Grids and choose Beam Grid

Enter the data to create Nodes in Nodes Column

Node 1 : X=0, Y=0

Node 2: X=16, Y=0

we can see that Two nodes are created at the distance of 16m.

Enter the data to create Beam in Beams Column

Node A: 1 and

Node B: 2

Beam is created of Length 16m.

Click on PROPERTIES

Properties dialogue box opens

Click on Define

Add the Section here

Select Rectangle and fill the data required.

YD= 0.23m, ZD=0.23m, Material = Concrete and

click Add.

Select Materials, from the Material Tab and assign it to the created beam.

It can be checked by selecting the Concrete Title, then we can see that the created beam lines will be highlighted.

Select SUPPORTS TAB

Supports-Whole Structure dialogue box opens

Click on create option

select Fixed and click Add.

Then to assign Support at the two ends of beam,

Select Use Cursor to Assign option to assign the supports.

Click and select Support 2 (Fixed support) then using appropriate assigning method assign it in the Nodes.

click Load Cases < Add < Add New : Load Cases.

Add New: Load Case dialogue box opens.

select Primary

Number = 1, Loading Type =Dead, Title = DL.

Click on Load & Definition Tab

click Load Cases < Add < Add New : Load Cases.

Add New: Load Case dialogue box opens.

select Primary

Number = 1, Loading Type =Live, Title = LL.

Select Dead Load(DL)

click Add < Selfweight < Selfweight Load < Direction = Y, Factor = -1.

Select Live Load (LL)

click Add < Member Load < Uniform Force < W1 = -9kN/m, d2 = 16m, Direction = GY.

Select Use Cursor to Assign option to assign the Loads.

Select the Load and asssign the load to the beam.

Click on ANALYSIS TAB

Analysis-Whole Structure dialogue box opens

Click on Define Commands

Analysis/Print Commands dialogue box opens

Select Perform Analysis

Print options : No print and

click Add.

After adding Analysis/print command, click Run analysis.

Then we should get the Analysed model with 0 Errors

select Go to post proccessing Mode and click Done.

It will ask us to Select Load Cases and Combinations.

Select Created DL and LL,

Click OK to view Displacement of applied Load cases.

Click on RESULTS Tab

Go to View Results Palette

Check SFD and BMD by Click on SFD and BMD tool.

To view SFD of the model select FY icon present at the toolbar.

To view SFD of the model select Mz icon present at the toolbar.

Click on RESULTS Tab

Go to View Results Palette

Click on Layout

Click on Graph to view SFD and BMD

RESULT: -

Analyzed the given structural elements and validated the results.

A. Simply Supported Beam

B.Fixed Beam