Optimal FRP-strengthening strategy for corrosion-affected reinforced concrete columns
| Autor: | Wei Yang, Chun-Qing Li, Hassan Baji |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Computer science
business.industry Mechanical Engineering 0211 other engineering and technologies 020101 civil engineering Ocean Engineering 02 engineering and technology Building and Construction Structural engineering Fibre-reinforced plastic Geotechnical Engineering and Engineering Geology Reinforced concrete Rc columns 0201 civil engineering Corrosion Residual strength 021105 building & construction Renewal theory Safety Risk Reliability and Quality business Reliability (statistics) Civil and Structural Engineering |
| Zdroj: | Structure and Infrastructure Engineering. 14:1586-1597 |
| ISSN: | 1744-8980 1573-2479 |
| DOI: | 10.1080/15732479.2018.1476560 |
| Popis: | Deterioration of reinforced concrete (RC) structures is unavoidable after their long time in service, with corrosion being the major mechanism of deterioration. In order to ensure safety of deteriorated structures, an effective rehabilitation plan is essential. Although considerable research on strengthening of RC structures using fibre-reinforced polymers (FRPs) composites has been undertaken, more is on the methods of strengthening and effects of corrosion on strength of RC columns than that on the prediction of optimum strengthening time. This paper presents a methodology for determining the optimal strengthening time and the required number of FRP layers for corrosion-affected RC structures with application to columns. The methodology is based on the time-dependent reliability method and the renewal theory. An example is provided to illustrate the application of the proposed methodology. It is found in this study that an optimum point for the formulated objective function exists, and that outcomes of optimisation problem, i.e. strengthening time and number of required FRP layers, are sensitive to corrosion rate. The significance of the proposed methodology is that it provides guidance for practitioners and asset managers to decide when and how to strengthen deteriorated structural members. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|