Probabilistic model of the minimum effective cross-section area of non-uniform corroded steel bars
| Autor: | Xiaodan Ren, Xiangling Gao, Yutong Pan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry 0211 other engineering and technologies 020101 civil engineering Statistical model 02 engineering and technology Building and Construction Structural engineering Reinforced concrete 0201 civil engineering Corrosion 021105 building & construction Service life General Materials Science Statistical analysis business Failure mode and effects analysis Beam (structure) Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 216:227-238 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2019.05.012 |
| Popis: | In general, the corroded reinforced concrete members is induced by the natural environment in existing buildings or by the two artificial accelerated corrosion such as electrochemical method and artificial simulated environment. The deterioration of yield strength of corroded steel bars is mainly caused by the decrease of the effective cross-section area, the randomness and the variability of the corrosion. The position of the yield point occurs at the minimum effective cross-section area. Through the statistical analysis of 1706 groups of experimental data on yield strength of corroded steel bars, the relationship between the minimum effective cross-section area of non-uniform corroded steel bars and the average corrosion ratio under three corrosion conditions has been established. After that, a probabilistic model of minimum effective cross-section area of corroded steel bars has been proposed and, meanwhile, a correction coefficient is suggested to adjust the deviation of the yield strength between the average corrosion ratios of artificial accelerated corrosion and natural environment corrosion. Based on the presented probabilistic model, a reinforced concrete beam member under natural environment was analyzed. It is found that the flexure-shear competition happened during its service life, that is, the failure mode may change because of the non-uniform corrosion. Therefore, the non-uniform corrosion of the corroded RC members should be taken into account seriously in structural design. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect