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Computers and Concrete Volume 20, Number 5, November 2017 , pages 573-582 DOI: https://doi.org/10.12989/cac.2017.20.5.573 |
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A performance-based design method for chloride-induced cover cracking of RC structures |
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Dong-Hui Yang, Ting-Hua Yi and Hong-Nan Li
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| Abstract | ||
| Chloride-induced cover cracking will aggravate the performance deterioration for RC structures under the chloride-laden environment, which may endanger the safety of structures and occupants. Traditional design method cannot ensure that a definite performance is satisfied. To overcome the defects, a study on the performance-based design method was carried out in this paper. Firstly, the limit state functions were established for the corrosion initiation and cover cracking. Thereafter, the uncertainty analysis was performed to study the effects of random factors on the time-dependent performances. Partial factor formulae were deduced through the first-order reliability method for performance verification. Finally, an illustrative example was presented and the sensitivity of cover depth to other parameters was carried out. It is found that the uncertainties of the random variables have great effects on the required cover depth. It is demonstrated that the performance-based design method can ensure that the target performance can be satisfied and support to formulate a rational maintenance and repair strategy for RC structures under the chloride environment. | ||
| Key Words | ||
| reliability; performance deterioration; partial factor formulae; sensitivity analysis; performance verification | ||
| Address | ||
| Dong-Hui Yang and Ting-Hua Yi: School of Civil Engineering, Dalian Univ. of Tech., Dalian 116023, China Hong-Nan Li: 1) School of Civil Engineering, Dalian Univ. of Tech., Dalian 116023, China 2) School of Civil Engineering, Shenyang Jianzhu Univ., Shenyang 110168, China | ||