Modelling Grillage With Curved Overhang At the End

[saberali.akbar]

Hi, Is there any way to model the curved overhang for grillage analysis in SBD. I attached the image for reference. 

My another question is can i import Autocad drawing into SBD?

Regards

[simon_hooper]

Yes you can model this type of grillage.  The mesh 'splay following edge' type option would be appropriate with the internal mesh shape options set to straight longitudinally and transversely (see attached image).  You can also adjust the spacing to suit.

With respect to Autocad, yes you can import a model via the Import Model icon on the Explorer Panel Toolbar.  The entities must be LINE, POLYLINE or ARC for import.

In your case, it is probably easiest to bring in the roadway alignment from DXF via the Design Line form import option and then define the mesh manually.

Simon

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[saberali.akbar]

Thanks Simon,

Im wondering how you made the curved edge as per you attached image. Did you input it manually or imported it from autocad?

[simon_hooper]

In my example, I defined a pair of construction lines offset parallel to the alignment.  But if the edge is not parallel, you can define setting out lines, which can either be imported from dxf or defined as a transient curve from a series of points that can be entered manually or pasted into the table from the clipboard.

[saberali.akbar]

I managed to model the curved portion by importing from Autocad dfx file but i am having problem when comes to bridge patch load application as you can see as per attached image the load is out of structure at one side and its not fully applied at the other side. Anyway to resolve this issue?

[simon_hooper · Accepted solution]

If was able to define the patch load in my model.  You need to select "4 objects" as the define loading by option on the form, otherwise the load won't follow the curve.  I usually hide the beam members (untick Beam Elements on 'Objects' graphic tab) to make it easier to pick the objects.  You should be able to pick either design lines/setting out objects, construction lines or span end lines.