IDEA StatiCa Tutorial – Robot Structural Analysis link
This tutorial will show how to activate and use the link between Robot Structural Analysis (RSA) and IDEA StatiCa Beam. We will describe how to design, reinforce and check the prestressed concrete double-span beam according to Eurocode.
1 How to activate the link
- Install the latest version of IDEA StatiCa, get it in the Downloads
- Make sure you are using a supported version of RSA – updates are published in the BIM section
IDEA StatiCa automatically integrates the BIM link into your CAD/CAE software during its installation. You can check the status and activate more BIM links for later installed software in the BIM link installer.
Open IDEA StatiCa and navigate to the panel BIM and open the BIM link installer. A notification "Run as administrator" may appear, please confirm with the Yes button.
Select the software to integrate the IDEA StatiCa BIM link, click the Install button and check the Installed status.
2 How to use the link
First, we download the source folder and we open Model-Concrete hall.rtd in RSA and run the linear analysis. We select beams 1 and 2 (64 and 75 in RSA) and open the plug-in via Add-Ins→IDEA StatiCa→Beam.
We create a New project and select the EN (Eurocode) to follow.
To continue the export process, we press the Next button. We do not change the folder to save the project. If we selected different path, the Code-check manager wouldn’t be able to see and manage the exported items.
We select the Straight beam loaded in vertical plane and we add Supports. Such settings will limit the calculation to 2D and it will not be possible to apply forces in the other plane.
We select Pre-fabricated concrete beam, specifically Prestressed precast beam with the option of subsequent post-tensioning.
Self weight will be generated automatically based on the cross-section. We just add the Permanent load of –4 kN/m and at this point, we set the variable load to zero.
Standardly, only the variable load cases (not affecting the rheology of the structure) are exported. We add two variable load cases: SNOW and LIVE LOAD. These two cases will be exported as user-defined internal forces (My, Vz, N) from the global analysis.
Now, we can set the particular stages of construction: the beam will be prestressed in 5 days (PRE switch). In the stage of Storage and Transport, the supports will be shifted 2 m from the edge of the beam (values L1 and L2) and there will be 1 aditional support in the middle (value n). The Final supports (next stage) will be in the distance of 28 m. The Superimposed dead load will be applied in 40 days.
3 IDEA StatiCa Beam project
In Project Data, we allign the beam and the position of supports to the bottom surface.
The conctere grade is imported from the FEM software automatically. Nevertheless, in our example, the grade imported from RSA (C25/30) is not sufficient for prestressed members, therefore, we change it directly in IDEA StatiCa Beam (Materials) to C40/50.
The variable loads were automatically assigned to exclusive load cases. It means that they will not be combined together (only one of them can enter one combination).
EN combinations 6.10 a,b were generated automatically by the application. Nevertheless, we need to add the variable load cases into the appropriate construction stage. We Edit (2) the variable load cases (3) into all of the ULS and SLS combunations of the End of the working life stage.
Now, we can move to the Tendon design by the button in the top ribbon.
In the left tree, we open Tendons – Tendons Layout.
Now, we can import the prepared templates. Press Import – New tendon(s) from TXT file and load Prestressing tendons.nav from the source folder.
All the prestressing parameters are already set in the template.
We can run the calculation of prestressing losses. We open Prestressing Losses – Tendon Stress/Losses in the left tree and press Calculate FEM.
We Exit the module once the analysis is finished.
We can display the diagrams of internal forces in each of the construction stage. In the menu in tho top ribbon, we can switch between stages and combinations. The figure below presents the internal forces from ULS combination in stage 7: End of the working life.
In each stage, we can see the extreme internal forces and the corresponding combination.
In Concrete Design 1D – Data in the left tree, we can find the settings of the checks that will be evaluated. All the checks are turned on by default. We deselect the Lateral stability evaluation, assuming that it is ensured.
We will add some bars of Reinforcement now. We set the scheme of the reinforcement zones of the beam in the Zone templates (top ribbon). We select the second scheme which corresponds to a typical double-span beam.
We set the begin and end of each of Reinforcement zones (1) and the Check position (2) defining the sections where the concrete cross-section will be assesed.
We will reinforce the zone A–A (3) first and zone C–C (4) after that. The other two zones are symmertic and their reinforcement will be symmetric too. By clicking on the A–A in the figure, the reinforcement definition window opens.
We use the predefined template to reinforce the zone A–A. We change only the Stirrups distance to 0.15 m.
We add the reinforcement of the zone C–C by same procedure. We change the Stirrups distance to 0.2 m.
4 Calculation and Results
We run the calculation of the whole TDA analysis of the reinforced cross-sections by clicking on the Results in the left tree. After the calculation is finished, the overall check status appears with the maximum utilization. IDEA StatiCa Beam also provides in which stage and for which load combination the maximum utilization appears.
If we were interested in more detailed results in each section, we could open the RCS application by the Detailed button in the top ribbon.
In the end, we can go through the Detailed report (in the left tree). IDEA StatiCa provides the possibility to adjust the protocol settings and also the final print into PDF or DOC file.
concrete, beam, reinforcement, Eurocode, construction stages, TDA, time-dependant analysis, concrete grade, tendon, template, prestressing, losses, BIM, Robot Structural Analysis, RSA, continuous beam, double-span beam