Paper 5: Volume 4 No.2 September 2005 Edition
Probability-Based Design
in Ventilation
Krystyna
Pietrzyk
SP
Swedish National Testing and Research Institute; Energy Technology,
Building
Physics, Brinellgatan 4, SE-50115 Borås,
Sweden
Abstract
This paper describes a concept of probability-based design and its
application in the field of ventilation. The path of probability-based
design is followed with the help of examples concerning the air change
rate caused by natural and mechanical forces. The object of this study is
a low-rise building situated in two different climatic zones. Evaluation
of the probability of failure gives a background for probabilistic design.
The limit state approach based on the FORM (First-Order Reliability
Method) technique is proposed as an effective tool for probabilistic
approximations and reliability analysis. The possibility of the risk- or
reliability-based analysis of different design options is discussed.
Key words: air
infiltration, ventilation, building performance, reliability, FORM,
probability of failure, probability-based design.
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