Week 2 Challenge

Question 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 ?

 

ANSWERS :-

1.1 How will you assign Circular section to column ?

The detailed procedure of assigning the circular section to column is discussed below :-

• So we must first access the properties panel in order to assign the circular section to the column.
  then select Define from the menu.
• After that, a new dialogue box titled "properties" will appear. In that dialogue box, choose the circular section option from the provided list.
• Give the circular section's desired diameter after that.
  then select the Add button.
• The circular section with the desired diameter has now been produced.
• Then choose the option that says "assign to the selected view" after selecting the circular section
• Then simply click OK after selecting the option apply.
• The aforementioned process allows us to include the circular section of any diameter.

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

We have two ways in which we can assign the Unit system to a .std model file, they are :-

• at the beginning.
• in the midst of the undertaking.
• By selecting the option for Units system at the beginning of the process, we can choose between the Metric and English units systems before creating a model.
• And while developing a model is the second way we can alter the units system.
• So, to change the unit system while working, simply select the File option, after which you will see a
• setting's-related option. Click that option, and a change-units option will appear.
• These two methods are how we can convert Units to a.std model file.

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

The different parameters that to be specified while using "Bay Frame" options are listed below :-

• Length of the frame.
• Width of the frame.
• Height of the frame.
• Number of bays along length.
• Number of bays along width.
• Number of bays along height.

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

The few codal standards incorporated in STAAD Pro software are listed below :-

• Euro Codes.
• American Codes.
• ACI Codes.
• IS codes.
• BS Codes.
• ASCE Codes.
• CAN/CSA Codes.

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

To specify the design compressive strength for a RCC section ,below are the steps involved in designing the compressive strength of a RCC section :-

• Go to the Design panel first.
• After selecting the design option, a dialogue box with the title Steel Design-Whole Structure will appear.
• There, you can select the Define Parameters option by clicking on it.
• Following that, a dialog box titled "Design Parameters" will appear. There will be a number of options in that dialogue box on the left side of the dialogue box; only select the FC option from those options, which stands for an RCC section's compressive strength.
• Now, based on the concrete grade we chose for the project, specify the compressive strength here.
• The design compressive strength for can be specified in this manner as well.

 

Question 02.

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

ANSWERS :-

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

There are 8 "Input" steps that are involved in the design that are listed below :-

- GEOMETRY :- So the geometry panel mainly deals with the initial part of the modelling in the STAAD Pro software. In the geometry panel we can draw the entire building using the geometry panel. The whole building is drawn within the geometry input as per the Architectural layout that we have received .

- PROPERTIES :- So in the Properties panel we assigned the various properties to the model like beams, columns, plates etc using this property panel.

- MATERIALS :- As the name suggest, we assigned different materials to the model using the material panel. 

- SPECIFICATIONS :- In the specification panel we assigned the designations that to be followed while analysing. 

- SUPPORTS :- In this panel we assign the base supports and the boundary conditions. All the things that are related to the loadings that we are going to assign in the model are done in this loading panel.

- ANALYSIS :- In the analysis panel, the computational analysis is executed. After doing the above steps we need to analyse the building for the safety of the building and this analysation of the building is to be done in the analyse panel.

• DESIGN :- The Design is the last stage of modeling in the STAAD Pro software. Following analysis, building sections are designed, and design input is used to extract the detailed reinforcement design based on the designing we have already completed.

2. Explain the difference between Fixed and Enforced support condition in STAAD Pro ?

The difference between the fixed and Enforced support condition in STAAD Pro is discussed below :-

Fixed Support Condition	Enforced Support Condition
Fixed support are restrained in all six degrees of freedom.	Enforced support are also restrained in all six degrees of freedom.
It does not contain spring constant.	It contains spring constant.
	When enforced force are defined, the software considers these as springs of high stiffness to oppose the fixed support.
	It is only essential to define enforce support only when we are working for the models with plates or solids.

.

Question 03 :-

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 ?

 

ANSWERS :-

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

The steps that are involved in the analysis of the model using the STAAD Pro sequentially are discussed below :-

• So once the modelling have been completed and all the loads and the loads combinations have been assigned to the model
• Then comes the analysis part that is carried out in a sequential manner as discussed in the steps below.
• Therefore, the first thing we must do in order to analyze the building is to simply navigate to the Analysis panel, where the option to define commands will be located.
• After that, a new dialogue box with an analysis/print command will appear; this dialogue box also has a number of options.
• then decide on the approach based on our project.
• Make sure all the loads and load combinations are selected before clicking on the load list.
• then select Add, and then click OK to close the dialog box.
• After that, click one of the options to run the analysis.

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

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 order to model a building, one should first use the node-by-node method.
• Using coordinates, we assign the nodes in this method in accordance with the manually drawn architectural plans.
• By utilizing the geometry panel, we can assign the nodes to our structure.
• Additionally, depending on the dimensions and levels of the building, these nodes may be repeated transitionally.

STRUCTURE WIZARD :-

• So the second method is structure wizard method to model a building.
• 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. Elaborate the different support conditions in STAAD Pro ?

The different support conditions in STAAD Pro are listed below :- 

• Fixed Support Condition.
• Pinned Support Condition.
• Enforced Support Condition.
• Enforced But Support Condition.
• Multilinear Support Condition.
• Tension/Compression only springs.
• Foundation Support Condition.

FIXED SUPPORT CONDITION :-

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

PINNED SUPPORT CONDITION :-

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

ENFORCED SUPPORT CONDITION :-

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

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

 The stress distribution for a staircase slab can be distracted by using the below procedure :-

• First of all create the nodes of a staircase using the geometry panel option.
• After creating the nodes assign the plate element as the Slab property. And then define load cases and calculate the area load that is acting on the staircase slab.
• After this apply the load cases and the load combinations to the plate element as the area load.
• And then create a mess on the plate element.
• And after creating the mesh on the plate element go for the analysis of the model successfully, go to the Post-Processing mode option which can be present on the left side of the screen.
• Select the plate result option after selecting the post-processing mode option.
• A drop-down list will appear after selecting the option; simply select the option labeled "stress distribution result" from that list.
• Select the appropriate stress type from the drop-down menu under the option "stress type"
  then select the OK option.
• The STAAD Pro software will display the results of the stress distribution after you click the OK button.
• The distribution outcome is also visible in the form of various color zones that display the maximum and minimum stress values.
• The results of the minimum and maximum stress distribution along the staircase are shown by different colors.
• Thus, this is how the stress distribution for a staircase slab can be extracted.

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

The different ways to view the SFD & BMD in STAAD Pro software has been discussed below :-

• In order to view the SFD & BMD in the software, first create the model using the nodes method in the geometry panel.
• After creating the nodes, go to the Properties panel and assign the properties to the model.
• And after that give the specification to the model according to the architectural layout.
• Assign the support conditions, after assigning the support condition to the model do the analysis.
• After completing the analysis successfully, now go to the post-processing mode.
• Then another dialogue box will appear; simply select the option labeled "beam result" in that dialogue box.
• A tool palette will show up on the screen after selecting the option.
• Various values, such as the shear force or the bending moments, are visible here.
• So, select the Fy option to view the shear force diagram, and select the Mz option to view the bending moment diagram.
• So, using this method, we can easily see the diagram of the shear force and bending moment.

* 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

AIM :- 

• To analyse the simply supported beam and to validate the results.

PROCEDURE :-

• First of all draw the beam of length 20m. And to draw the beam of 20m use the node-by-node option.
• After creating the nodes now draw the beams just as shown in the below given image

• After creating the beam of 20m length now add the properties to the slab.
• Add a rectangular section to the beam just as shown in the below given image

• After selecting the newly added section, choosing the option to assign it to the view, and then clicking the option Assign, follow the steps in the image below.

• Now after assigning the property, now we will be assigning the material as Concrete.
• To assign the material, go to the material panel. A new dialogue box will then appear; in this dialogue box, select the desired material, and then assign it to the beam as shown in the image below:

• After assigning the material, now we have to assign the support conditions to the beam, its both ends are pinned.

• And now assign the point load of 50 KN and both the loads are located at the 5m from each support just as shown in the below given image

• Now the loads of 50 KN have been assigned at both the ends just as shown in the below given image

• After assigning the loads we will be doing the analysis, in order to run the analysis set the analysis method and run the analysis just as shown in the below given image

• The analysis has been done

• After doing the analysis go to the post-processing mode and select the load cases and check the SFD & BMD diagrams just as shown in the below given image

SHEAR FORCE DIAGRAM :-

BENDING MOMENT DIAGRAM :-

                           B.Fixed Beam           

           a. Span L = 16m

           b. Uniformly Distributed Load w=9kN/m

 

AIM :- 

• To analyse the Fixed beam and to validate the results.

PROCEDURE :-

• First of all draw the beam of length 16m. And to draw the beam of 16m use the node-by-node option.
• After creating the nodes now draw the beams just as shown in the below given image
• After creating the beam of 16m length now add the properties to the slab.
• Add a rectangular section to the beam just as shown in the below given image
•    

• Now click on the Add option and select the added section and choose option assign to the view and then click on the option Assign and click just as shown in the below given image
• After designating the property, the material will now be designated as concrete.
• Go to the material panel to assign the material, and a new dialogue box will appear. There, select the desired material, and then assign it to the beam as shown in the image below:

• After assigning the material, now we have to assign the support conditions to the beam, its both ends are fixed.

• And now assign the point load of 9 KN just as shown in the below given image

• Now the UDL of 9 KN have been assigned at beam just as shown in the below given image

• After allocating the loads, we will conduct the analysis. To do so, select the analysis method and carry out the analysis as shown in the image below.

• The analysis has been done

• Following analysis, switch to post-processing mode, choose the load cases, and examine the SFD & BMD diagrams as shown in the image below.

SHEAR FORCE DIAGRAM :-

BENDING MOMENT DIAGRAM :-