Models for flexural cracking in concrete; the state of the art

[gulilero]

Models for flexural cracking in concrete; the state of the art by
A. Borosnyoi and G. L. Balazs
Structural Concrete,  2005 - 6  No 2
Crack formation presents a complex mechanical and geometrical question to be modelled. The available crack
width formulations are often based on simplifications. A rigorous formulation of crack widths should be based on
the integration of strain differences of reinforcement and concrete between cracks, due to the accumulated slips.
In this paper an extensive literature review on crack widths and crack spacing is presented. The basic intention of
the present paper is to summarise the development of flexural crack models and collect the most relevant formulae
for crack spacing and crack width. It reports not only the possible improvement of design or research equations but
also the appearance of new types of reinforcements with different characteristics from those of steel
reinforcements. This state-of-the-art Report is a contribution to the work of fib TG 4.1 ‘Serviceability Models’.

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