Abstract
This paper presents a stochastic damage model for evaluating the internal deterioration of concrete due to freeze-thaw action, which involves great uncertainty and randomness. In this model, the structural element of concrete is discretized into infinite microelements, whose lifetimes are assumed to be independent random variables. Then expressions for the mean and variance of the damage of concrete are analytically derived. To calibrate the model parameters, a series of freeze-thaw tests in water on non-air-entrained concrete were conducted and back-calculation analyses were performed on the test results of dynamic modulus. The reliability of the proposed stochastic damage model is further validated through comparisons with the results of 80 other existing test specimens. The present model offers a theoretical basis for exploring the statistical aspect of concrete behavior during freeze-thaw. © 2013 RILEM.
| Original language | English |
|---|---|
| Pages (from-to) | 1025-1039 |
| Number of pages | 15 |
| Journal | Materials and Structures/Materiaux et Constructions |
| Volume | 47 |
| Issue number | 6 |
| Online published | 9 Jun 2013 |
| DOIs | |
| Publication status | Published - Jun 2014 |
| Externally published | Yes |
Funding
Acknowledgments This research was financially supported by the National Natural Science Foundation of China (No. 51108413), the Fundamental Research Funds for the Central Universities (No. 2012QNA4016) and the Western Construction Project of Ministry of Transportation (No. 20113288061110). The authors are grateful to the staff and technicians in the lab for their kind suggestions and assistance during the execution of this research. In addition, the authors wish to thank The Hong Kong Polytechnic University for this collaborative research opportunity.
Research Keywords
- Concrete
- Freeze-thaw action
- Micro-level
- Stochastic damage model