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http://dx.doi.org/10.4334/JKCI.2009.21.6.789

Mechanical Properties of Concrete with Statistical Variations  

Kim, Jee-Sang (Dept. of Civil Engineering, SeoKyeong University)
Shin, Jeong-Ho (Dept. of Urban and Environmental System Engineering, SeoKyeong University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.6, 2009 , pp. 789-796 More about this Journal
Abstract
The randomness in the strength of a RC member is caused mainly by the variability of the mechanical properties of concrete and steel, the dimensions of concrete cross sections, and the placement of reinforcing bars and so on . Among those variations, the randomness and uncertainty of mechanical properties of concrete, such as compressive strength, tensile strength, and elastic modulus give the most significant influences and show relatively large statistical variations. In Korea, there has been little effort for the construction of its own statistical models for mechanical properties of concrete and steel, thus the foreign data have been utilized till now. In this paper, variability of compressive strength, tensile strength and elastic modulus of normal-weight structural concrete with various specified design compressive strength levels are examined based on the data obtained from a number of published and unpublished sources in this country and additional laboratory tests done by the authors. The inherent probabilistic models for compressive and tensile strength of normal-weight concrete are proposed as Gaussian distribution. Also, the relationships between compressive and splitting tensile strength and between compressive strength and elastic modulus in current KCI Code are verified and new ones are suggested based on local data.
Keywords
compressive strength; splitting tensile strength; elastic modulus; statistical variations; probabilistic distribution models;
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Times Cited By KSCI : 1  (Citation Analysis)
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