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Strut-and-Tie models for the design of non-flexural elements : computational aided approach

Abstract : Within the field of Reinforced Concrete (RC) structures and more specifically, at the design of non-flexural elements such as corbels, nibs, and deep beams, the rational procedure of conception and justification referred as Strut-and-Tie Method (STM) has shown some advantages over classical algorithms of reinforcement computation based on FE analysis (eg. Wood-Armer or Capra-Maury). The STM remains a suitable alternative for the design of concrete structures presenting either elastic or plastic behaviour whose application framework is well defined in concrete structures’ design codes like the EuroCodes and the AASHTO-LRFD Bridge Design Specifications. Nevertheless, this method has the main inconvenient of requiring a high amount of resources investment in terms of highly experienced personal or in terms of computational capacity for, respectively, its manual application or an automatic approach through topology optimisation. The document proposes a light alternative, in terms of required iterations, to the automation of the STM, which starts from the statement that the resultant struts and ties of a suitable ST model can be distributed according to the direction of the principal stresses, "sigma_{III}" and "sigma_{I}" , obtained from a planar or a three-dimensional FE model
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Gustavo Mendoza Chavez. Strut-and-Tie models for the design of non-flexural elements : computational aided approach. Civil Engineering. Université Paris-Est, 2018. English. ⟨NNT : 2018PESC1030⟩. ⟨tel-02132474⟩

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