Department of Civil Engineering, Nagoya Institute of Technology Structural/Earthquake Engineering Laboratory |
Investigation of Corrosive Environment of Bridge and its Numerical Simulation |
In-situ monitoring of corrosive environment of a bridge | |
ACM corrosion sensors and temperature humidity sensor are set up at a bridge. |
ACM sensor (upper left) and Actual investigation situation Mechanism of ACM sensor Results (Point: measured value, Line: calibrated curve) |
ACM(Atmospheric Corrosion Monitor) | |
Water adsorption on the surface of sensor by the condensation Corrosion current is generated by oxidation and reduction reaction on the surface of the sensor. Measure the corrosion current and monitor corrosive environment | |
Estimation of Amount of Adhesive Salinity and Steel Corroding Speed | |
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Application of CFD to Corrosive Environment Simulation in Bridge Neighborhood | |
The condensation of water plays a critical role in corrosion process of a steel bridge Numerical simulation by Computational Fluid Dynamics (CFD) |
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Expression of Condensation and Evaporation of a Water | |
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Simulation of Evaporation Inside a box-girder | |
Simulation of the evaporation in a box girder when a ceiling of the girder is cooled down. Evaporation speed is six times slower in the ceiling than that on the side and the floor.
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Distribution of water drops |
Distribution of humidity |
Acquisition of large scale environmental Information by meso-scale Atmospheric Model | |
Local meteorological data is necessary for proper boundary and initial conditions for local CFD analysis The large scale environmental data is obtained by meso-scale atmospheric model(e.g., MM5, WRF). | Flow chart of MM5 model |
Comparison of the distribution of atmospheric pressure |
Comparison to Nagoya meteorological observatory (Temperature, relative humidity, wind velocity) |