Visualizing The Concepts of Robert Maillart

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Robert Mailart is one of the famous Civil Engineer and Structural Engineer in the history. He is specially known for his aesthetic and structurally stable arch bridges.

Today, I tried to apply his concepts in FEM using FreeCAD. I modeled a simple concrete structure with total space of 6m x 3m x 3m.

  1. The very first specimen consisted of 4 columns (300 mm x 200 mm), 4 tie beams (150 mm x 150 mm), 4 beams (200 mm x 200mm) and 1 slab (150 mm) with area load of 50 kN. The max. abs diplacement achieved in this case was around 2.08 mm.

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2. In the second case, I removed all the beams and tie beams, and inserted two arch beams (200 mm x 300 mm) touching the slab bottom. This time the max. abs diplacement in the result was of 1.43 mm with the same area load.

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3. In the third case, I inserted four walls (100 mm) between the slab and arch beam. Now, the max. abs diplacement reduced to 0.47 mm, keeping the area load same.

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So, one can clearly conclude from the above results that how inserting the arches can significantly reduce the displacements. Also, the amount of material gets reduced to a large extent. On the aesthetic point of view, the beauty of the structure increases effectively.

 

 

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