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Thank you, we are adding this idea for adding a tool to calculate effective length of steel members to the product backlog. If this proves well adopted, then we will lok to expand with an option for concrete members.
Dear All,
With reference to the above constraint in calculating the KZ parameter for Moment Resisting Frames, a Macro has been developed.
This macro is aimed at..
Minimum manual inputs to Macro, which shall minimized the calculation checking efforts of engineer.
User is only responsible for correct modelling of staad file. Thus the checking efforts are limited to staad input file. Minimal efforts are then required to verify that the correct inputs are entered on to the Macro screen.
User shall initiate a design of Moment resisting sway frame by assuming KZ parameters (May be by approximating the end conditions with the standard diagrams given in code).
Once the preliminary section sizes are determined the exact KZ parameters can be entered which the Macro calculates in automised way.
The Lengths and Section properties are taken from Staad file itself and no manual efforts are required.
Since all (Most of the inputs) the required inputs are obtained from Staad file itself, a similar approach can be adopted in staad engine and this way the user intervention can be completely eliminated to achieve both accuracy and Saving of time and efforts.
Users, please note that the attached macro is prepared considering the requirements/formulae as per Eurocode National Annex - Nedelands.
Similar Macro can be developed for other codes as well.
The detailed video for "how to use" the macro & flowchart can be viewed at below links
https://www.youtube.com/watch?v=QfMJcA2wiAA&t=12s
https://www.youtube.com/@CivilBotsforBeginners/featured
Regards,
Pravin Agashe.
Thank you for posting your idea. I hope you dont mind, but I have added the description based on your comment as you didnt do that when posting it. There has been requests for having some form of automation provided for defining the effective length factors, but there are different rules for different codes and in different countries. What are the rules that you are advocating? How would the expect the program to know how the rules should be applied? Is the starting point determining the physical object and then where restraint points are ion the model. On steel structures that often means providing some information about the connection type. Is the connection to the web or one/both flanges, etc. That is currently not part of the analytical model so much more information would need to be added to the analytical model before using automation rules.