SE4244 Modelling for Integration Ralph Pullinger Structural Technical Specialist, Autodesk, AEC Division (Northern Europe)

Class Summary Learn the ins and outs of the new analytical model within Autodesk® Revit® Structure 2012. This class covers how to model effectively for bidirectional integration with Robot™ Structural Analysis Professional and any third party analysis application. This class is important for both engineers and modellers and is ideally suited for today’s new breed of engineer.

Learning Objectives At the end of this class you will be able to: Understand the complexities of the Revit® Structure analytical model Make decisions confidently and assign responsibilities for model generation Learn to make compromises but know who will ALWAYS win out

Who am I? Ralph Pullinger Structural Technical Specialist, Autodesk, AEC Division (Northern Europe) Professional Engineer Autodesk 3 years Consulting 22 years Projects small to large, simple to complex – integrated workflows a speciality

All is not as it seems… Spot the difference – all eight. Hands up when you have them.

Analytical examples

Stepped slab – model

Stepped slab - analytical

Stepped slab - lessons Walls are good – when used correctly Beams are better – in certain situations Projecting the analytical line of slabs needs to be monitored

Slab on walls - model

Slab on walls - analytical

Slab on walls - lessons Default behaviour is not always good Consistency when attaching walls to floors is important Walls must be modelled so that the outside IS the outside

Column and beams - model

Column and beams - analytical

Column and beams - lessons When is a wall not a wall? Who knows what a rigid link is? Is this engineering or modelling? Revit settings still apply

Analytical settings Automatic checks Tolerances Member Supports Check Analytical/Physical Model Consistency

Sloping beam - model

Sloping beam – analytical

Sloping beam - lessons Analytical control is quite complex, however, it can be quite rewarding Flexibility is the key

Grid systems - model

Grid systems - analytical

Grid systems - lessons Sometimes there can be too much flexibility and too much time can be wasted

Overall observations If entered blindly the integration process will fail The key to integration is communication It is essential that Engineers understand modelling and that Modellers understand engineering There is lots of flexibility If there is an impasse then the model wins as the project must be documented

Analytical adjustment Playback video

Extending integration to documentation Consider adding loads Locking them to elements Load flexes with elements Do engineers need to be modellers? Do modellers need to be engineers?

Documenting loads Create fills based on use Add comments to the loads Annotate loads to display their comments Aids internal and external documentation Very useful check!

Robot link interface

THERE ARE TWO MODELS: a physical model and an engineering model Robot link process First pass – Robot model is created from scratch Engineer adds loads, combinations, ‘technical’ stuff and design Robot model returned to Revit for update with new member sizes Second pass – Robot model is merged with Revit geometry Engineer does their thing again Robot model returned etc. THERE ARE TWO MODELS: a physical model and an engineering model For this to work when using files keep the same name – let the link do the work!

Summary There are two personas Some have split personas An Engineer A modeller Some have split personas The ‘new breed’ (who are really a modern ‘old breed’) It is important that the integration process is understood by all It is vital that information is managed i.e. who does what, when It is not rocket science! Thank you for being here and enjoy the rest of AU!

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