Week 2 Challenge
1.1) Go to properties in that select define property select circle and give the radius for the member and assign the defined circle to the member created Q1.
1.2)
In older versions of STAAD.Pro ( v8i and older ), the base units may be changed as explained next
1. Go to the opening page of STAAD.Pro. In this page, you will only be able to see two options in the top menu bar – “File” and “Help”.
2. In the “File” menu, click on the “Configure” option.
3. On clicking on the “Configure” option, the following is displayed (refer Figure 2).
4. Click on the “drop-down” switch. The current base unit settings will be shown and highlighted. Click on the required Unit Settings and click on “Apply” and “Accept”. Refer Figure 2.
5. Your Base Unit Settings are changed now.
1.3) The program contains a large number of parameter names which are needed to perform designing and code checking. These parameter names, with their default values, are listed in the following table. These parameters communicate design decisions from the engineer to the program.
The default parameter values have been selected such that they are frequently used numbers for conventional design. Depending on the particular design requirements of an analysis, some or all of these parameter values may have to be changed to exactly model the physical structure. For example, by default the KZ (k value in local z-axis) value of a member is set to 1.0, while in the real structure it may be 1.5. In that case, the KZ value in the program can be changed to 1.5, as shown in the input instructions. Similarly, the TRACK value of a member is set to 0.0, which means no allowable stresses of the member will be printed. If the allowable stresses are to be printed, the TRACK value must be set to 1.0
1.4) STAAD is a popular structural analysis application known for analysis, diverse applications of use, interoperability, and time-saving capabilities. STAAD helps structural engineers perform 3D structural analysis and design for both steel and concrete structures.
A physical model created in the structural design software can be transformed into an analytical model for structural analysis. Many design code standards are incorporated into STAAD to make sure that the structural design complies with local regulations.
1.5) For design purpose, the compressive strength of concrete in the structure shall be assumed to be 0.67 times the characteristic strength. The partial factor y, 1.5 shall be applied in addition to this.
2.1) (i) This method is based on the linear elastic theory and assumes that both steel and concrete are elastic and obey Hooke's Law. Therefore, this method is also known as 'Elastic method of Design' or 'Modular Ratio Method'. (ii) The working stress is based on the behaviour of structure at working loads (service loads).
2.2) When the FIXED or 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. (For the FIXED BUT support type, if any degrees of freedom are assigned a spring using the KFX thru KMZ terms, those are treated as unknowns and their displacements are calculated).
When the ENFORCED or 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. 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)
-
Select the Run Analysis tool in the Analysis group on the Analysis and Design ribbon tab.
Press <CTRL+F5>
The STAAD Analysis and Design dialog opens.
During the analysis (and design, if specified), an output file is generated. This file may contain selected input data items, results and error messages. Optional print specifications can be used to include additional information in the output file.
- Select an option for what action occurs when the dialog is closed:
Open the output file
go to the post-processing mode
remain in the analytical modeling mode
- Click Done.
- To review the output file is this option was not selected in the STAAD Analysis and Design dialog, either:
Select the STAAD Output tool in the Utilities group on the Utilities ribbon tab.
3.2) The two ways in which a structural framework/model can be created in STAAD Pro software are: Node by Node method. Structure wizard method.
3.3) STAAD offers a variety of support types to simulate different boundary conditions, such as fixed, pinned, roller, elastic, spring, tension-only, and compression-only. However, not all support types are compatible with all analysis types or all elements.
3.4)
- 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. ...
- After this apply the load cases and the load combinations to the plate element as the area load.
3.5)
First you must Analyze the file. Go to Analysis and Design -> Run Analysis in the ribbon menu of STAAD.Pro. After the analysis of the file is completed, click on the Done button.
Next, we go to the Postprocessing workflow to view the forces and results graphically.
The next step is to go to the Postprocessing workflow to view the deflection values graphically. Remember that if your analysis is not successfully completed (for reasons such as errors in your input data), you will not be able to access the Postprocessing workflow.
By default, the deflection diagram always opens up in the post processing screen of STAAD.Pro.
To view the Bending Moment Diagrams, select the Beam Results page at the top of the model. From the ribbon menu, choose Results -> Annotate. Under Ranges, choose All (the All button means the Bending moment diagram will be displayed for all members).
Under the Beam Results tab, you will see the options Bending, Shear, Axial, Displacement and Stresses.
Make the appropriate choice.Click on the Annotate button. Then click on the close button.
Here are a group of of other options to view BMD, SFDs
To view the bending moment diagram for individual members you may go to the Results > Layouts > Graphs option in the ribbon menu and the BMD, SFD and axial force diagrams for the member would be displayed on the right.
Alternately you may also double click on any member to bring up the query box and go to the Shear Bending tab to see the bending moment or shear force diagrams for that member.