Evakuation Systems for life-Cycle Cost of Concrete Structures

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A framework for total evaluation system for concrete material and concrete structures was established from the viewpoint of establishing life-cycle cost including the effect on the society by assembling analysis methods of concrete at fresh, early-age and hardened stages for material and structural performances. A framework for evaluation methods for safety of construction work and prediction for segregation by using mix-proportion and material characteristics at construction period were established. At early stage, simulation method for volume change caused by autogeneous and drying shrinkages was established applicable to variety of mix-proportioning, materials, curing, environment and age. At in-service stage, simulation methods for deterioration and lowering structural performance during some to tens of years was tried to be established by modelling salt movement, equilibrium and movement of ion, carbon-dioxide and oxygen in concrete, and collision of reinforcing bar, based on integrated system of thermo-hygro and physical analysis simulating development of concrete material structure at early stage. In addition, parallel computation system for three-dimensional FEM analysis method simulating development and deterioration process of concrete at early stage and for three-dimensional analysis system for concrete structure. A framework for method of retrofitting and strengthening design was also proposed form the viewpoint of performance-based design.