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中南大学学报(英文版)

Journal of Central South University

Vol. 27    No. 5    May 2020

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Influence of steel corrosion to flexural behavior of coral aggregate concrete beam
DA Bo(达波)1, 2, YU Hong-fa(余红发)3, MA Hai-yan(麻海燕)3, WU Zhang-yu(吴彰钰)3

1. Key Laboratory of Coastal Disaster and Defence of Ministry of Education, Hohai University,Nanjing 210098, China;
2. College of Harbour, Coastal and Offshort Engineering, Hohai University, Nanjing 210098, China;
3. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China

Abstract:To study the flexural behavior and calculation model, 8 coral aggregate concrete (CAC) beams with different types of steel were designed. The flexural behavior of CAC beam was tested. The failure mode, bearing capacity, the maximum crack width (ws) and average crack spacing (lm) were studied. A calculation model for the bearing capacity of CAC beam was proposed. The results indicated that with the steel strength increased, the cracking moment (Mcr) and ultimate moment (Mu) of CAC beam increased, and the development of the ws gradually slowed, which effectively inhibited the formation of cracks and improved the flexural behavior of CAC beam. For CAC structures in the ocean engineering, it is recommended to use organic new coated steel to extend its effective service life. In addition, considering the influence of steel corrosion, a calculation model for the Mcr, Mu, lm and ws of CAC beam was established.

 

Key words: coral aggregate concrete beam; steel corrosion; flexural behavior; bearing capacity; calculation model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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