Analysis of concrete structures with hydration heat and differential shrinkage = 수화열과 부등건조수축을 고려한 콘크리트 구조물의 해석에 관한 연구

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In this dissertation, to improve the current method of predicting thermal stresses and to develop analysis program inclusive of coupled hydration heat and differential drying shrinkage, a series of experiments and numerical analysis were performed. Relating to thermal stresses, thermal properties of concrete (i.e., thermal conductivity and the heat transfer coefficient) and the heat generation model were investigated to improve the predicted temperature distribution accuracy. And the analysis method for the behavior of concrete after cracking was described. In addition to the numerical prediction, the new device measuring thermal stresses was developed. For the coupled stress due to hydration heat and differential drying shrinkage, the mutual relationship between heat transfer and moisture diffusion was numerically investigated. Also, three-dimensional analysis program for the coupled stress was developed. From the experiment for the thermal conductivity of concrete with seven parameters, the results show that aggregate volume fraction is a main parameter on the conductivity of concrete. Based on the experimental results, the prediction model was proposed to accurately estimate the thermal conductivity of concrete. The proposed relationship correlates test results by indicating the sample correlation coefficient of 0.95. According to the experimental results for the heat transfer coefficient, the effect of wind velocity on the heat transfer coefficient is larger than that in previous models and varies with form types. Based on this experiments and the theoretical background for flow convection, the general prediction model including properties of formwork as well as wind velocity was proposed. The heat transfer coefficient obtained by the proposed model well agrees with those from the experiments. To predict the generation of hydration heat, the hydration heat model is adopted. This hydration heat model is more reasonable than the adiabatic temperature ris...
Advisors
Kim, Jin-Keunresearcher김진근researcher
Description
한국과학기술원 : 건설및환경공학과,
Publisher
한국과학기술원
Issue Date
2003
Identifier
231066/325007  / 000985332
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 건설및환경공학과, 2003.8, [ xii, 210 p. ]

Keywords

Thermal stress; Thermal property; Differential drying shrinkage; Hydration heat; Crack; 균열; 온도응력; 열물성치; 부등건조수축; 수화열

URI
http://hdl.handle.net/10203/30554
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=231066&flag=dissertation
Appears in Collection
CE-Theses_Ph.D.(박사논문)
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