Suguru KUGA
The Loading Test for Corroded Pre-tension Prestressed Concrete Beam
Takumi SHIMOMURA
At present, there is few studies regarding the structural performance of prestressed concrete beam which contains corroded prestressing steel bars. To investigate the influence of corrosion of prestressing steel bars on load carrying capacity, an accelerated corrosion tests by external current was carried out in this study. Then, these beams were loaded until failure. Totally, ten beam specimens were made in this study. Six specimens were loading in flexural, while the others were loaded in shear-flexural. Through the loading test, the reduction rate in flexural capacity and the performance of flexural deformation was compared with the degree of corrosional deterioration. Finally, we tried to investigate how to reduce the shear performance of prestressing beams due to the corrosion of prestressing steel bars.
Additionally, a mechanical characteristics is experimentally investigated on the corroded prestressing steel bars.
As a result, flexural cracking load and flexural strength of corroded pre-tension prestressed concrete beam was able to be evaluated to the safety side by calculating to consider mechanical characteristics of corroded prestressing steel bars.
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