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Friction and Tensile Strength of EB Components — 2 Comments

  1. Looking over this, I can tell that without the barbed wire the structure will stand and the barbed wire is added almost entirely due to earthquake considerations. Correct me if I am wrong.
    That being said, I’m not sure if the testing is realistic. I would imagine that during an earthquake the wall would be the weakest when a perpendicular force is applied to it, not a parallel force. So then in the testing should the barbed wire be located differently? I think it should be rotated 90 degrees, my reference is the first picture.
    Just a suggestion, I hope this makes sense.

    • Some people are building without barbed wire, so it is possible, especially on small structures with vertical walls in non-seismic areas. But barbed wire adds an element of strength and prevents slippage, and so we typically encourage it.

      You’re right about earthbag walls being weakest in out of plane (perpendicular) forces. Barbed wire down the length of walls helps hold everything together by providing tensile strength. You’d lose the tensile strength by turning it 90 degrees.

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