Make a link between RSA and Advance Suites in order to be able to check steel connection, reinforcement etc .... drawn in advance and vice versa.
When dealing with irregular buildings, the engineer is challenged to design a system that has translational vibration in the first modes. This means zero or near zero eccentricity e0x and e0y.
The idea is to implement an iterative solution which can propose location, length and thickness of additional walls (or columns) to be added to the initial configuration. This addition shall impose zero or near zero eccentricity e0x and e0y.
I did that in a spreadsheet for a simple building by calculating the CM and CR for the original configuration. Then I updated the calculation by introducing new wall which gives zero e0x and e0y by simple Goal Seek option in Excel.
I guess this idea could be easily implemented in ARSA.
What do you think?
If Robot had a Direct Integration (The Simplest and Slowest) Solver it would become the go to for Non-Linear Time History. Non-Lin Time History Analysis requires Direct Integreation since none of the other solvers are unconditionally stable. Imagine running a 6 hour analysis only to find that the solver is computationally unstable "it has happened." I say it would be the go to because the ability to analyze on the cloud is huge for this application. A typical ASCE 41 Analysis requires a minimum of six analysis runs at around 4-12 hours apice depending on the TH and model. The current standard is Perform3d which would take up to Six Days per iteration to run the model. If this could be cut to 1day by pushing it to the cloud that would be amazing!!
1) We need PROPER documentation for the entire software
2) Make it possible to constrain motion among multiple nodes without explicit use of master and slave nodes, it seems only possible to make rigid constraints between nodes which causes loss of important info because the rigid links are so stiff.
3) The program seems to have difficulty with 2nd order analysis especially with the addition of bar releases. Even with the multithreaded solver and dsc solver activated it is difficult to get the right answer out of it. Proper documentation would most likely help with this
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.
I would like to see a way to create load cases based on existing load cases. This would be useful for making varations of load cases and load cases dependent on other loads.
For example, equivalent horizontal loads from structural imperfections are horizontal loads dependent on the vertical loads. It would be useful to be able to create a horizontal load case based on a vertical load case to easily account for this. The horizontal load case should be dependent on the vertical load cases, so a change or addition of loads in any of the vertical load cases automatically generates a corresponding change in the horizontal load case. There should also be an option to unlink the load cases so a update does not automatically generate a change.
This would also facilitate creating load cases in different directions, as is needed for wind loading, seismic loading, accident load et.c.
The only way to do anything similar (to my knowledge) today is to go into the load table and copy a load case and manually edit the load case assignment, the load size and and the load direction. This does however make the load parts of the horizontal loads untraceable, so it's hard to keep track of which loads have been used to create the horizontal load case. Using load combinations allows you to combine loads, but not edit the directions of the loads. It is also common practice to only create load case combinations out of basic load cases.
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.
I think everyone have tryed to get ennoyed about how the plates seems to turn upside down, sideway or inside out when you go into Provided reinforcement maps for plates just fells allraund random. I whould love to have every plate turn up the same way, Like local system is allways followed, i dont care about the detalies, aslong as the same rule is allways followed, because then i whould be able to not have to think about what side of the wall im lokking at, in what direction. I can just adjust my local system for all the walls, whits i do anyway.
Im sure this is and easy function to fix, so thanks on advance
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.
It will be a very powerful tool if you create a link with Opensees (open source hi level structural analysis software) that allow the user to export the model (geometry, sections, material, loads) to Opensees and, after the nl calculation, import the results from them. The first phase can be done such a special *.str file, and the second it can be done with a special _RT file. Watch on line the power of opensees.
Robot structural Analysis program has a huge international standards and international codes both for steel and concrete structures.
In Turkey we use Turkıish standards and regulations analaysing and and designing of concrete and steel structures. But Robot has no calculation option for Turkish engineers. ..
is there any study for the integration of Turkish standards in to the software?
Offsets have to be replaced with another option in which rigid links will be automatically defined in proper locations, because the way that they are used right now in Robot is not convenient at all and it is causes many simulation problems... Especially in RC structures, where it is immediate to consider non "centerlined" connections between members, Robot has to be improved about this issue.
I am trying to find out why RSA produces the bending moment diagram for a simply supported beam with a UDL on the begative side of the graph, as seen in the attachment.
Based on my calculations, the bedning moment diagram should be on the positive side of the diagram.
Is there an elementary setting for sign convention I am missing?
Improve flexural, torsional, flexural-torsional, lateral-torsional buckling analysis in steel beams, adding Warping torsional degree of freedom for steel beams.
There are some software (STABLAB, SOFISTIK) use a beam finite element directly developed for the analysis of thin-walled spatial steel members. This element is based on Vlasov theory and has 7 degree of freedom at each node (3 displacements, 3 rotations and 1 warping freedom). You don't need to built a model based in shell elements to realize the buckling analysis of the steel profiles.