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http://dx.doi.org/10.4334/JKCI.2009.21.5.619

Estimation Method of Creep Coefficient in Concrete Structures  

Park, Jong-Bum (Research Institute of Energy and Resources, Seoul National University)
Park, Jung-Il (Cheil Engineering Co., Ltd.)
Chang, Sung-Pil (Dept. of Civil and Environmental Engineering, Seoul National University)
Cho, Jae-Yeol (Dept. of Civil and Environmental Engineering, Seoul National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.5, 2009 , pp. 619-628 More about this Journal
Abstract
To predict the time-dependent behavior of concrete structures, the models which describe the time-dependent characteristics of concrete, i.e. creep and shrinkage are required. However, there must be significant differences between the displacements that are obtained using the given creep and shrinkage models and the measured displacements, because of the uncertainties of creep and shrinkage model itself and those of environmental condition. There are some efforts to reduce these error or uncertainties by using the model which are obtained from creep test for the concrete in construction site. Nevertheless, the predicted values from this model may be still different from the actual values due to the same reason. This study aimed to propose a method of estimating the creep coefficient from the measured displacements of concrete structure, where creep model uncertainty factor was considered as an error factor of creep model. Numerical validation for double composite steel box and concrete beam showed desirable feasibility of the presented method. Consideration of the time-dependent characteristics of creep as one of the error factors make it possible to predict long-term behaviors of concrete structures more realistically, especially long-span PSC girder bridges and concrete cable-stayed bridges of which major problem is the geometry control under construction and maintenance.
Keywords
time-dependent behavior; creep; uncertainty factor; geometry control;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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