Load carrying mechanism of concrete beams restrained externally by steel plates

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  • 鋼板により外部拘束を受けるコンクリートはり部材の耐荷機構
  • コウバン ニ ヨリ ガイブ コウソク オ ウケル コンクリートハリ ブザイ ノ タイカ キコウ

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Compressive Membrane Action: CMA is a well-known load carrying mechanism of slabs due to external restraint. As a countermeasure of salt attack into reinforced concrete slab decks, so-called steel-free bridge decks incorporated CMA have been constructed in Canada. First, three loading tests of concrete beams with/without an existence of both reinforcement and external restraint due to a steel plate, have been carried out to extract its essence as a compressive strut. Second, the material nonlinear finite element analyses relevant to the tests were sufficient to explain the test observations. Consequently, the numerical results could show clearly compressive strut formation and also its load carrying mechanism with a steel plate in tension.


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