Week 2 Challenge

1.

    1. How will you assign Circular section to column?

• First we want to create a new model in staad pro software 
• Use the geometry option to create nodes 
• create a beam between the nodes by using add beam option
• Next go to the property option assign the column
• Under the property option we want to click the define option
• In there they have a some types of column option in that we want to select the circular option
• And edit the circular radius by using yd value = 0.5m radius or other some value
• Next select the circular column option what we created there 
• Go the assign to view option and assign it

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

• First we can still get the data displayed in imperial units.
• Next Go to View - Display Option  and set appropriate units for Structure Units, Section Units, Force Units etc. as needed.
• The model data will then be displayed graphically in those units.
• Also to ensure that any data going forward is entered in imperial units, we can:
• Go to Tools > Set Current Input Units and set the Length and Force units appropriately.

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

• 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.

     In staad pro option they are have some few codal standard option, they are given 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?

• Go to the design option 
• And click on the define parameter
• In the design parameter the FC (compressive strength)  of RCC section is given as 30000 kN/m2.

2.

    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:

And the final step in modelling in STAAD Pro software is the Design. So after doing the analysis, the building sections are designed and the detailed reinforcement design according to the designing that we have done so far is extracted through design input.

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

Fixed Support:-

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:-

When the enforced type of support is specified for those degrees of freedom which are to be treated as restrained, Staad assigns a springs for transitional 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 six 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.

   They are  two ways

• Node by Node method.
• Structure wizard method.

    NODE-BY-NODE:

• So the first way to model a building by adopting node-by-node method.
• 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.
• And these nodes can be transitionally repeated based on the building dimensions and the levels.

    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.

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

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

•  first create a nodes and add beam
• 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 
• I will given a stair creating image shown in below
• NEXT APPLY THE LOAD WE CREATED
• After complete the all type of work go to run analyais and taken a output 
• All the outputs are given below

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

 

• In order to view the SFD and 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 there will be another dialogue box, in that dialogue box there will be an option called beam result just click on that option.
• After clicking the option a tool pallete will appear on the screen.
• Here we can see different values such as Shear force or the Bending moments.
• So in order to see the shear force diagram, click on the Fy option and if we want to see the bending moment diagram then click on the option Mz.
• So this is the procedure by which we can see the Shear force and Bending moment diagram easily.  

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

 STEP 1:

• CREATE A NEW MODEL IN STAAD PRO
• After that make a node and add a beam by using add beam option
• Next we want to apply the properties 
• go to define option and go to rectangle make the size of 0.3 and 0.45
• Use assign to view option to assign the properties

STEP : 2 

• Next want to create a material by using material tab
• assign a concrete to beam
• using the assign to view option to assign it
• After that we want to create a SUPPORT
• GO to the create option to select the fixed support add and close
• Next created support want to assign on both end nodes
• created support as shown in below fig

STEP : 3 

• Next want to create loads
• Go to the loading option and click Add \
• Create Dead load and live load
• Under the dead load make a selfweight and add into beam
• Next make a uniform load -50kn and assign the load on beam
• Next make a load combination and assign it 

STEP : 4 

• Go to the utility option and select the command file
• And change the staad space to plane
• next go to the analysis and  design tab
• select the concrete and change the ISCODE 457
• Next go to the command file option
• select the perform analysis option and close
• Make run analysis option
• Finally go the resuly , i got no warning and error so go the post processing option to output
• I attach the result fig below
• I got a shear force and bending moment diagram and it's result value 

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

STEP : 1 

• First we want to create a new project  
• And using a node table option to create nodes and it length 16m
• Next create a beam by using add beam option 
• Want to arrange properties by propertie option
• select a define option to make a rectangle column and give a size of 0.3 & 0.4 add and close
• Assign a properties we created by using assign to view option  

STEP : 2 

• Next want to create a material by using material tab
• assign a concrete to beam
• using the assign to view option to assign it
• After that we want to create a SUPPORT
• GO to the create option to select the fixed support add and close
• Next created support want to assign on both end nodes
• created support as shown in below fig

STEP : 3 

• Next want to create loads
• Go to the loading option and click Add \
• Create Dead load and live load
• Under the dead load make a selfweight and add into beam
• Next make a uniform load -9kn and assign the load on beam
• Next make a load combination and assign it 

STEP : 4 

• Go to the utility option and select the command file
• And change the staad space to plane
• next go to the analysis and  design tab
• select the concrete and change the ISCODE 457
• Next go to the command file option
• select the perform analysis option and close
• Make run analysis option
• Finally go the resuly , i got no warning and error so go the post processing option to output
• I attach the result fig below
• I got a shear force and bending moment diagram and it's result value