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Title: Evaluation of thermal crack by a probabilistic model using the tensile strain capacity
Authors: Lu, H.R.
Swaddiwudhipong, S. 
Wee, T.H. 
Issue Date: Feb-2001
Citation: Lu, H.R., Swaddiwudhipong, S., Wee, T.H. (2001-02). Evaluation of thermal crack by a probabilistic model using the tensile strain capacity. Magazine of Concrete Research 53 (1) : 25-30. ScholarBank@NUS Repository.
Abstract: Tensile strain capacity is defined as the maximum tensile strain that concrete can withstand without a continuous crack forming. The present study shows that the tensile strain capacity of concrete is a relatively constant value and it is virtually unaffected by mix proportions, curing age and compressive strength. This result is consistent with the fact that the same value of tensile strain capacity can be used to evaluate thermal cracking of concrete of different mix proportions. The phenomenon of occurrence of a crack inherently contains a large number of indefinite factors and it is proper to use the concept of probability for evaluation. The probabilistic model based on strain is proposed in this paper. Over 200 uniaxial tension tests were conducted to study the relationship between the tensile strain capacity and the number of failed specimens. From the experimental results, the relationship between the probability of occurrence of a crack and the restrained tensile strain is established in the model. The results from the experiment of thermal cracking of a cylinder agreed reasonably well with the proposed model.
Source Title: Magazine of Concrete Research
ISSN: 00249831
DOI: 10.1680/macr.
Appears in Collections:Staff Publications

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