Easy creation of curved shapes: improvements in lofted plates and lofted slabs

Last updated March 26, 2020 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2020

Easy creation of curved shapes: improvements in lofted plates and lofted slabs

Easy creation of curved shapes: improvements in lofted plates and lofted slabs

In Tekla Structures 2020, the creation of lofted plates and lofted slabs has been further enhanced. You can now model even more complex curved shapes by using polycurve construction objects. Previously, in Tekla Structures 2019i, you could only use construction lines, arcs, or circles to create the lofted parts. Additionally, you can now unfold lofted plates in single-part drawings.

Examples of polycurve lofted parts:

 

Create a lofted plate or a lofted slab by using construction polycurves

  1. Create the needed construction polycurves that pass through the points you pick and that can have straight and curved segments. The shape of the lofted part is based on the construction polycurveconstruction object that represents a polycurve passing through several picked points

    Construction polycurves can have straight and curved segments.

    shape.

    To create lofted parts with tangential shape, use the Create arc by tangent or Create tangent line options on the construction polycurve toolbar.

    To create lofted parts only with straight segments, use the Create line option .

  2. Start creating a lofted plateplate that is created by using construction objects

    Lofted plates can be used to model plates with complex shape, for example, rolled plates and plates with double-curved form.

    or lofted slabslab that is created by using construction objects

    Lofted slabs can be used to model curved or double-curved slabs or walls, for example.

    using the polycurve construction objects:

    • To create a lofted plate(1) part that represents a flat structure

      (1) In some contexts, for example in analysis, the term plate object may be used to refer to plates.

      (2) plate that represents a steel structure

      (2) Plate is mainly used as a connection piece or as a floor plate.

      , click Steel > Plate > Create lofted plate.

    • To create a lofted slabplate that represents a concrete structure

      In Tekla Structures, a slab is created by picking three or more points.

      Slab may be part of a floor, for example.

      , click Concrete > Slab > Create lofted slab.

  3. On the toolbar that appears, click a button to specify whether to create the part by using two construction polycurves, or by using a construction polycurve and a point.

    • Use two construction polycurves to create the lofted part:

      1. Select the first construction polycurve.

      2. Select the second construction polycurve.

      3. Tekla Structures creates the lofted part between the selected construction polycurves.

        Note that the construction polycurves do not need to have the same number of segments, as long as both of them are tangential.

    • Use one construction polycurve and a point to create the lofted part:

      1. Select the construction polycurve.

        Tekla Structures shows a preview of the part geometry. Use the preview to set the direction and the height of the lofted part.

      2. Pick a point.

        Tekla Structures creates the lofted part based on the preview.

  4. If you want to modify the shape of the lofted part, use the direct modificationfunction that activates the mode where the model objects can be modified by using handles

    Direct modification enables additional handles and modification options.

    dimension handles and dimension values.

Unfold lofted plates

You can now unfold lofted plates in single-part drawings.

The unfolding works for lofted plates which have been created from single geometry to single geometry, and for tangential polycurve lofted plates.

Examples of unfolded lofted plates created from single geometry to single geometry:

Examples of tangential polycurve unfolded lofted plates:

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Comments

by Giorgio De Lorenzi

To be clear, with "tangential polycurve" do you mean polycurve composed by a curve and straight line tangential to the curve?

by Arkadiusz Celarski

How about cut-outs and the resulting NC files? Our current tests of this feature for steel parts are not that optimistic... Often NC file is "inside-out" and edges of cut-outs are perpendicular to plate's unfolded face which leads to mistakes when cuts were originally modeled at some angle.

by Tekla User Assistance

Hello, and thanks for your feedback; I've forwarded your concern to our product development team. You can also contact your local support for further assistance.

by Giorgio De Lorenzi

I think that the unfolding method should be explained