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LIFE CYCLE TECHNOLOGY Computer
simulation of structures is for mathematical emulation of natural weather
conditions, internal temperatures and moisture contents and different
degradation mechanisms of materials and structures. Computer simulation
together with experimental research lay the foundation for the development
of degradation, service life and action effect models. · Experimental research of degradation · Computer simulation · Degradation and service life models ·
Service
life and life cycle planning ·
Combined
condition, cost and environmental effect analyses ·
Planning
of repair actions, projects and resources · Life cycle management systems VTT
offers overextended research related to the life cycle management of
buildings and infrastructures. The
experimental research of degradation which includes both laboratory and
field research is traditionally VTT’s central field of know-how.
Plentiful facilities and good knowledge of materials render good
conditions for experimental research. Service
life design means the specification of materials and measures so that the
intended service life a structure will be achieved with required
probability. Life cycle design refers to controlled maintenance of
structures with various repair and protection actions so that the required
condition is guaranteed during the whole design period. Both the service
life design and the life cycle design call for application of degradation
and service life models. The life cycle design requires also action effect
models by which the effects of repair actions on the condition of
structures can be predicted. Combined
life cycle analyses in which the condition, costs and environmental
effects are examined side by side as a function of time, represent
advanced life cycle management in the real sense of the word. This concept
allows optimisation of many objectives for structures at the same time.
Special methods for multiple criteria decision making can be included in
the analyses.
The combined condition, cost and environmental effect analysis offers the basis also for the planning of repair actions, projects and financial resources. The planning of repair actions includes the specification and timing of repair actions during the design period. Project planning refers to combination of repair actions which previously were timed in consecutive years to be implemented at the same project and so gaining the synergy profit. The resource planning is for laying down annual project plans in such a way that that the reserved financial resources are not exceeded. The planning can be performed based on components, structures or networks of structures. This analysis and planning methodology gives the basis for a modern life cycle management system. To
work well a life cycle management system must be installed among the other
systems of an organisation or a company. It requires as a support an
inspection system of structures and a data management system (database)
and different guiding systems to guarantee the expected functioning of the
software system. A good life cycle management system helps the decision
making at different levels of an organisation by providing the necessary
short- and long-term plans for the administration, annual resources plans
for the financial administration and preliminary
project plans for the maintenance staff. VTT
has been involved in the development life cycle management systems for
bridges, roads and buildings.
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