Revit Structure 2014 Tutorial – Analytical nodes

Link to YouTube Video: http://youtu.be/J2_iddaJzLg

When transferring models from Revit Structure to structural analysis tools one of the biggest issues is often that the original analytical model within Revit Structure has inconsistencies, these being isolated nodes, beams not connected etc.

Isolated Nodes

Trying to identify these issues can be time consuming and a little tricky but Revit Structure 2014 has some great new tools that can help with these issues. By Default, each node now has a read only property which enables the user to see the connectivity of the node.

Node Read Only property

 

Autodesk have also included two filters within the standard template which will enable you to very easily identify issues with a Revit model.

Nodes - Filter Applied

 

Take a look at my short tutorial video, I think this is a really useful tool for those that are transferring from Revit to Analysis.

Link to YouTube Video: http://youtu.be/J2_iddaJzLg

LawrenceH

Revit Structure 2013 – New Analytical tools

The last release of Autodesk Revit Structure saw some major improvements to the way that an analytical model can be displayed and edited. Colour coding was introduced to visually see the start and end of the analytical line and a new tab was added to the Visibility/graphics dialog box to facilitate the display of the analytical model.

Revit Structure 2013 now adds the following improvements to the Analytical model and associated tools:

  • Bar and Node display
  • Load Combinations from analysis software
  • Valid Material Check

You can now display nodes within Revit Structure and there is support to allocate nodes and bars a unique number. I’m assuming that this information will be passed from the analytical software directly to Revit Structure but I haven’t checked the updated API for this functionality. The image above shows the bar numbers tagged in a locked 3D view.

Load combinations can now be passed from third party analysis applications directly into Revit Structure. This could be a very handy feature when using multiple analysis tools as the combinations should be able to support a two-way transfer, again this would need to be tested.

In the above image I have used Filters to show release conditions of the bars in the analytical view. One of the main questions I get from engineers is how to effectively view the release conditions initially set in the model by the structural technicians.

Project Storm is now available for Revit Structure 2013 and can be downloaded from the Autodesk Labs site. The analysis display styles are directly supporting the visual style of the results within Revit Structure 2013.

LawrenceH

 

OASYS GSA 8.6 link to Revit Structure 2012

GSA Analysis is a highly intuitive tool from ARUP, enabling users to carry out 3-D linear, P-delta, non-linear static analysis, dynamic analysis and more. GSA 8.6 now links with Revit Structure 2012 enabling engineers to import models from Revit Structure 2012 to GSA 8.6. You can also import a GSA 8.6 model directly into Revit Structure; however, this will have some limitations.

I have set up a simple test which is shown below. GSA took through the Grids, Levels and all structural objects. Below you can see the model in Revit Structue 2012.

Here is the same model transferred to GSA 8.6. Note that the transfer should be made from the Add ins tab in Revit Structure.

For further information and a free trial visit the following link:

http://www.oasys-software.com/gsa-analysis.html

LawrenceH

 

 

Load Takedown

Within the Robot Structural Analysis extensions is a very useful tool called Load Takedown. This module allows you to perform a simulation to determine the vertical forces or stress within your Revit Structure model. To obtain the correct results it is important to make sure you have a valid analytical model. You can use the tools on the Analytical tab to make sure you have connectivity within the analysis model or verify the structure within the Load Take down tool. The module is then able to pass the results back into Revit Structure so you can tag the loading on the foundations.

Start the Load Take down command from the Add-Ins ribbon as shown below.

The Load Takedown tool will then ask you to specify the load case that includes the self weight of the structure. You will then see the dialog box below. The first thing to do is verify the structure.

Next you are given the opportunity to model in supports. The supports are taken from Revit Structure but you can add or remove additional supports from this dialog box and control if the support is pinned or fixed.

On the Loads tab you can review and check the loading added to the Revit Structure model.

Next you are able to choose the load case, in this example DL1, and then click the Calculate command. I have also selected just the first floor to be displayed. You are then able to see the tributary areas. With the check boxes in the lower window you are able to review other information such as the axial forces shown below.

I have then been able to pass the foundation loading back to Revit Structure and tag the results as shown below. These are added as Internal Point Loads.

I hope you find this useful,

 

LawrenceH