表題番号：2018B-146
日付：2019/03/22
研究課題22020構造工学および地震工学関連
| 研究者所属（当時） | 資格 | 氏名 | |
|---|---|---|---|
| （代表者） | 理工学術院 創造理工学部 | 講師 | リム ソーポーケム |
| （連携研究者） | Department of Civil and Environmental Engineering | Ph.D. Student | Mingyang Zhang |
| （連携研究者） | Department of Civil and Environmental Engineering | Professor | Mitsuyoshi Akiyama |
| （連携研究者） | Lehigh University, 117 ATLSS Drive, Bethlehem, PA, USA | Professor | Dan M. Frangopol |
- 研究成果概要
- This research aims to study effects of current density on the spatial steel corrosion and to assess the residual loading capacity of corroded RC beams using finite element (FE) analysis. Two RC beams were corroded using current density levels of 50 and 500 μA/cm2. The spatial growth in steel weight loss in RC specimens was quantified at different corrosion levels using X-ray and image processing techniques. The experimental result shows that low current density (50 μA/cm2) induced more non-uniform steel corrosion than the high current density (500 μA/cm2). Gumbel distribution parameters were derived from the experimental results to approximately model the spatial variability of steel weight loss which is used as the input into FE model of corroded RC beams. The FE analysis result of the RC beam that has rebar samples generated by the Gumbel distribution parameters associated with lower current density provides a more scattering and lower yielding load capacity, compared with that from a specimen with higher current density.