Ryota Isaka
The dynamics characteristic of the steel reinforced concrete member which occurred after section restoration
Takumi SHIMOMURA
ĦĦThe concrete structure brings a fall of the durability by the deterioration phenomena such as damage from salt breeze or the frost damage. When remarkable deterioration must intend for the structure which moved in reality by the maintenance of the existing structure in the present conditions, there is it. It has already become the interested research theme to evaluate structure performance after the deterioration from the above-mentioned thing.
ĦĦI performed a loading examination of Nou River Bridge in the study of last year and got the information that was much advantage that were not provided at the laboratory level. Nou River Bridge is bleached in damage from salt breeze environment in the Sea of Japan coast for about 80 years, and damage from salt breeze is the steel reinforced concrete land bridge which deteriorated remarkably. A reinforcing rod weight rate of decline compared the survival bending proof stress of an average of 14% figures with an estimate in the fitness, and, as a result of loading examination of two figures that degree of the deterioration was different, a fall was not almost seen, but the fixation defectiveness of the reinforcing rod coupling produced it with the figure that corroded an average of 24%, and, as for the proof stress, it was it with about 50% in the fitness. In the state before the loading examination, the deterioration diagnosis of two figures did not have the difference of the big evaluation, and it was thought that the evaluation that was quantitative by the current deterioration diagnosis was not done. It was this study, and, for quantitative evaluation in the maintenance of the structure, aimed loading examined the examination of the factor which affected a dynamics characteristic most in the true structure based on a loading test result of Nou River Bridg
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