Geomechanics and Engineering

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Rock burst criteria of deep residual coal pillars in an underground coal mine: a case study

  • Qiu, Pengqi (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Wang, Jun (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Ning, Jianguo (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Liu, Xuesheng (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Hu, Shanchao (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Gu, Qingheng (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology)
  • Received : 2019.03.29
  • Accepted : 2019.11.17
  • Published : 2019.12.30
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Abstract

The reliability of reinforced concrete structures is frequently compromised by the deterioration caused by reinforcement corrosion. Evaluating the effect caused by reinforcement corrosion on structural behaviour of corrosion damaged concrete structures is essential for effective and reliable infrastructure management. In lifecycle management of corrosion affected reinforced concrete structures, it is difficult to correctly assess the lifecycle performance due to the uncertainties associated with structural resistance deterioration. This paper presents a stochastic deterioration modelling approach to evaluate the performance deterioration of corroded concrete structures during their service life. The flexural strength deterioration is analytically predicted on the basis of bond strength evolution caused by reinforcement corrosion, which is examined by the experimental and field data available. An assessment criterion is defined to evaluate the flexural strength deterioration for the time-dependent reliability analysis. The results from the worked examples show that the proposed approach is capable of evaluating the structural reliability of corrosion damaged concrete structures.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Shandong Province Natural Science Foundation

The research described in this paper was financially supported by National Key R&D Program of China (No. 2018YFC0604703); National Natural Science Foundation of China (No. 51574154, 51804181); Major Program of Shandong Province Natural Science Foundation (no. ZR2018ZA0603); Key R & D programs of Shandong Province (no. 2018GSF116003); Shandong Province Natural Science Fund (no. ZR2018QEE002, ZR2017BEE013). SDUST Graduate Student Technology Innovation Project (No. SDKDYC190116) The authors express sincere thanks to the reviewers for their helpful comments and suggestions for improving this paper.

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