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Probabilistic durability design and performance-based specification of concrete in the marine environment



Author(s): J. C Knights
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
ISBN: 978-2-35158-135-3
e-ISBN: 978-2-35158-136-0
Pages: 283 - 290
Total Pages: 8
Language: English


Abstract: 
The required or intended “service life” of a structure is a major factor in the design for concrete durability, and may even dictate how the overall design of a structure is approached. The longer the expected life of a structure, the greater the durability (and hence quality) of the concrete required.
Performance design and testing is a useful method to overcome the shortcomings of traditional prescriptive specifications and possibly lead to improvements. Most significantly, performance testing and design provides an additional degree of robustness for designs for prestige or strategically critical structures.
This paper provides an introduction to performance-based design and includes discussion on the approach to effective durability design for extended service lives of structures for long design lives in extreme environments.
A case study is presented where a full probabilistic design was undertaken for reinforced concrete sub-structures and superstructures for a large crossing in the Far East (project not disclosed) using a range of protective measures and best practice concrete technology. Commentary is given on probabilistic durability modelling for the ingress of chlorides to a defined Serviceability Limit State, for an intended service life of 120 years in an aggressive marine environment. Specified durability performance tests are discussed as a means to demonstrate concrete performance during construction.


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