Author: The Concrete Centre
1 June 2015
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The Concrete Centre
Strut-and-tie modelling is a simple method of modelling complex stress patterns in reinforced concrete as triangulated models. It is based on the same truss analogy as the design for shear in Eurocode 2 and can be applied to many elements. It is particularly useful where normal beam theory does not apply, i.e. where plane sections do not remain plane, e.g. in deep beams, corbels and pile caps. EC2 provides information about the use of strut-and-tie modelling and this article is an introduction for engineers who want to take advantage of this useful analysis method.
The concluding article in this series discusses the span-to-effective-depth method for verifying deflection limits of slabs and beams. (This article was corrected on 1 October 2015. For details, see the corrigendum published on page 37 of the October 2015 issue.)
Some masonry design in the UK uses concrete blocks. BS EN 1996 (Eurocode 6) covers the design of masonry for buildings and civil engineering works and is organised into four parts. This design guide covers vertical load design (strength and eccentricity) and concentrated loads.