Abstract
The objective of this deliverable is provide the terminology and
systematic reliability based methodology for modelling, analysing and
optimising the lifetime quality in the Lifecon LMS. This reliability approach
is working as a link between life cycle management and generic sustainability
requirements and European and global normative requirements.
The lifetime performance modelling and the reliability based limit state
approach are building an essential core of the integrated life cycle design,
lifetime management and MR&R (Maintenance, Repair, and Rehabilitation)
planning. Performance based modelling includes the following classes:
1. Modelling of mechanical (static, dynamic and fatigue) behaviour
2. Modelling of physical, chemical and biological behaviour
- Degradation based durability and service life modelling and design
- Modelling of thermal behaviour and the behaviour under fire conditions
- Modelling of moisture behaviour
- Modelling of biological behaviour
3. Usability modelling and service life calculations with obsolescence
analysis
The mechanical modelling has been traditionally developed on the limit state
principles already starting in 1930's, and introduced into common practice in
1970's. Also the modelling of thermal, moisture and biological behaviour of
materials and structures are already traditional. Therefore these are not
treated in this report, which is focused on durability limit state design and
usability, which is treated with obsolescence limit state design.
The lifetime quality means the capability of the structures to fulfil the
multiple requirements of the users, owners and society (human and functional
requirements in use, lifetime economy, lifetime ecology (economy of the
nature) and cultural acceptance) in an optimised way during the entire design
or planning period (usually 50 to 100 years).
Taking into consideration all classes of limit states: mechanical (static and
dynamic), durability and obsolescence limit states, we have to define these
limit states first in generic terms. Using the generic definitions we are able
to describe more detailed definitions and criteria of limit states in each
specific case separately.
Original language | English |
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Place of Publication | Espoo |
Publisher | VTT Technical Research Centre of Finland |
Number of pages | 95 |
Publication status | Published - 2004 |
MoE publication type | D4 Published development or research report or study |
Keywords
- lifetime
- performance
- reliability
- mechanical performance
- durability
- obsolescence