Sometimes for complicated models you have to check loads accuratelly.
Unfortunately, Robot Structural Analisys doesn't provide tools to verify load values on different panels/bars/nodes.
I think, it can be good idea to add tool which makes "Maps of Loads" for elements of the model.
In my opionion, one of the best realization of such tool in Ukranian software Lira-SAPR (link: http://www.liraland.ru/).
The screenshots of this feature is shown below.
It will be very useful if will be added to Robot Structural Analysis Professional the option to automatically create groups for steel bar verification.
The rules to create the groups could be three:
1) grouping by cross section (Hea, Ipe, ....)
2) grouping by bar type ( columns, beams, bracings, ecc)
3) both rules merged (1+2).
This function will be very powerfull in large models when the user want to show in the calculation report the table of verification of all the bars and also plot the detailed report for the top ratio bar for its family (for example Hea or column or both, as previously described).
Obviously the auto group don't have to overwrite the manul group defined, and it must be always up to date, also after a property modification for some bars ( change cross section or change verification rule).
I think that this is not difficult to do for DEV team and it will be very useful for all the users, specially for the steel stucture designers as me.
Hope for this, greetings.
In some codes wind load is divided in two parts - dynamic and static.
For example, in Russian Codes, the dynamic part of wind load depends on: static load, masses and natural frequency.
Unfortunatelly, Robot hase no capabilities to calculate dynamic wind load automatically.
Please put back the EXPERT add on for the English package with the Retaining wall design, piles and pile cap design. this was very usefull. I don't know french so it is hard to install the french version and deal with it.
Quite long slabs on grade has irregular foundation pressure, thus they have to have irregularal elastic coefficient to calculate forces in slabs correctly.
Unfortunately, right now Robot has no capabilities to set non-constant elastic coefficient for the slabs.
Now this option is possible for French codes only. It would be great to implement general eurocode for wind loads (EVS-EN 1991-1-4:2005) for such calculation option.
My proposal is very easy to do. It could be useful if, in the parameter for modal Analysis, there will be add a tool to automatically convert loads to mass. In a lot of coutry code settings, the load to mass conversion coefficient is equal to psi2 (quasi permanent load cobination factor), well, it's incredibly easy to make this automatically.
Working on my last project (it's an concrete structure, about 150 000 nodes and 170 000 FE-s) I was extremely annoyed by Robot Str 2013 general performance. For example, changing an load value is operation with time consumption not less that half of minute on quite modern hardware (core i7 etc.). Changing values in tables is not much quicker...
I understand that you can recommend to use diaphagms instead shell etc, but in general - performance of Robot is not the best one, I can say the worst one. Now it is 2013 year and yes, sometimes we have to analyse and calculate models with more than 3 bars...
Here I do not speak of calculating time, meshing time - it's only problem of general performance, for example, changing load values in large scale models. So, my Idea is to optimize code (I'm fully understand that it can take a lot of time) to make Robot works much quicker.
1. Reinforcement drawings for inclined elements
2. Punching for inclined elements
3. Wall opening reinforcement (RC wall module)
4. RC module for Corbel elements (brackets)
5. More steel connections ...
Keep it up, you're best!!!
It's bad that Robot doesn't have an option to display diagram of requred shear reinforcement area (stirrups) in RC beams and columns.
Now, it's just able to show stirrup spacing as a diagram.
As an addition to following post:
Problem: In some cases it is desirable with different parameters for different analysis types in a structure. Examples could be:
- A structure where you want different releases in the static model than in the earthquake model
- A structure where you want different load to mass conversions for different cases
Currently, I often find myself saving different instances of a model. This means that changing geometry becomes time-consuming as each instance must be updated.
Solution: Allowing the model to branch, so that eg. one geometric model can be the parent of models with different material properties/loads/masses/analysis types.
Currently you can add bars to a group which is very useful to select those bars after. But if you want to change some properties such us the material, the section, the release or whatever, you have to do it one by one. I mean, select the bars, then change the section, after change the material, after change the relase...
In my opinion, would be very useful the posibility of make a kind of "MASTER GROUP" which not only save the selection of the bars but also all kind of properties so, changing the property in the group you change it authomatically for all the bars belonging to that group.
That would be much faster to change and review.
Likewise for nodes.
am inquiring about the possibility of applying fluctuating wind loads using spectral analysis? If that is not a viable option, are there any other ways to model fluctuating wind loads in the frequency domain using Autodesk Robot?
Please implement the design codes for New Zealand to compliment/ complete the existing code combinations (seismic etc). Especially as I believe Australian code development is being suspended with a view of adopting NZS codes (?). eg NZS1170...