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| During
the construction phase and the subsequent life span of advanced structures
costs can be significantly reduced, in particular by avoiding premature
damage in the construction stage. A fundamental issue in order to achieve
this is proper planning and production of the structure. With e.g. new
high performance concretes it is of utmost importance that the right quality
is maintained throughout the construction period. Otherwise heavy reduction
in robustness and resistance can be the result. Crucial here is the risk
of early age cracking of the concrete due to restrained volume changes
from the temperature and shrinkage during the hardening period.
An expert System will be developed to plan and control the production of
concrete structures. The Expert System will contain modules of varying
simplicity and refinement which can be used in the following phases of
a construction project:
-
the predesign phase
- to get rough estimates of the cost and efficiency of alternative production
methods
-
the design phase -
for detailed planning of concreting (choice of materials, cooling and/or
heating methods, insulation of formwork, formstripping time etc.)
-
the construction phase
- for updating the influence of weather changes, fluctuation of material
properties and temperatures on target crack risks.
-
the maintenance phase
- to check maintenance costs and repair needs.
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