Design and assessment of concrete structures with strut-and-tie models and stress fields
From simple calculations to detailed numerical analysis
Miguel Sério Lourenço (JSJ Ltd, Lisbon, Escola Superior Saúde-Instituto Politécnico de Setúbal)
Miguel Fernández Ruiz (Universidad Politécnica de Madrid)
Johan Blaauwendraad (TU Delft - Applied Mechanics)
Stathis Bousias (University of Patras)
Linh Cao Hoang (Technical University of Denmark (DTU))
Jaime Mata-Falcón (ETH Zürich)
Carlos Meléndez (Esteyco SA, Madrid)
Boyan I. Mihaylov (Sart Tilman B52)
Miguel Pedrosa Ferreira (Grupo NOV, Leiria)
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Abstract
The introduction of strut-and-tie models in fib Model Code 1990 as a design basis for discontinuity regions constituted a significant step toward promoting consistent design methods for reinforced concrete structures. In fib Model Code 2010, the scope was broadened through the stress field method that was introduced as a complementary tool. The present article summarizes subsequent evolutions in both methods, which will be incorporated in the upcoming fib Model Code 2020. Besides emphasizing their suitability for the structural design and assessment, their adaptability to the “Levels-of-approximation” approach is also depicted. This article presents the theoretical ground of both methods and looks on their potential for computer-modeling implementation. With this respect, several strategies are presented by discussing their advantages and optimum field of application.