A fuzzy probabilistic durability concept for strain-hardening cement-based composites

Author(s): F. Altmann, V. Mechtcherine
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 660 - 670
Total Pages: 10
Language: English

Abstract: 
To fully utilise the advantageous properties of high-performance fibre-reinforced materials, a performance-based durability design concept is required. Probabilistic approaches developed for ordinary crack-free concrete provide a rational basis for this. However, they have to be extended due to a lack of data required to quantify the input parameters and the need to adapt the underlying ana-lytical formulas describing corrosion processes. These formulas have to account for material-specific conditions and the resultant behaviour such as multiple cracking in case of strain-hardening cement-based composites (SHCC).
In this paper a fuzzy probabilistic concept to assess the durability of structural members made of SHCC is presented. Although only exposure to chlorides is explicitly considered, this concept may be regarded as a general framework for durability concepts for novel types of cementitious materials and different forms of environmental action. The analytical solution for chloride ingress used in the DuraCrete approach was adapted to allow for a mathematically correct description of the influence of ageing and to clearly reflect the contribution of cracks to chloride ingress. Furthermore, the consider-able non-stochastic uncertainty associated with most parameters in a new material is accounted for with the help of fuzzy-probability theory. Furthermore, the transparent and reproducible quantification of input variables based limited experimental investigations, literature review and expert assessment is demonstrated for one variable.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00