Rebar and RebarLayoutLine

[Rick Brice]

I'm trying to understand how Rebar and RebarLayoutLine work. I've added a RebarLayoutLine to the following project. https://openbrim.org/objidinuzdthqvpu8pf0rsiiosxi9.project

I expected that I would see several rebar within the girder sections, however all I see is a plane.

What graphical representation should I see if everything is defined correctly?

What is the proper way to define a layer of rebar with 5 bars spaced 2' apart? The bars run the full length of the girder.

[Ali Koc]

Early editions of OpenBrIM introduced RebarLayout objects (Linear and Circular) for representing reinforcements in cross-section. However, it was soon clear that it is not possible to define 3D reinforcement on 2D cross-sections.

Today, many of the objects in OpenBrIM library defines reinforcement details but none of them use RebarLayout objects. 3D reinforcement is defined using Line objects with Polyline option turned on. For example, take a look at DOT (State of Florida) Standard Bar Bend object under Jannet's account. You will find that the bar bent definitions can then be used to define reinforcement details of bridge components -- for example, take a look at Hammerhead Pier objects (again under Jannet's account).

That being said, we still use RebarLayout and TendonLayout objects for defining cross-sections on which sectional properties (including torsional constant), and simple moment capacity can be computed. For the project you posted, go to Asset view and then click on Girder under Sections. You should be able to see the reinforcements in section view and compute basic sectional properties on it. It is just not used for 3D views anymore.

Let me know if you have further questions on this.

[Ali Koc]

I am closing this issue due to inactivity. If you have further questions on this, please create a separate issue for it.