Abstract
The purpose of the present study is to assess accurately the stresses and the risk of transverse cracking in the early- age concrete decks of composite bridges. An analytical method that can reasonably predict the stresses in early-age concrete decks was investigated first. Several series of test members that can exhibit the early-age behavior of composite bridge decks were fabricated to measure the actual total strains, stress-independent strains, and stresses in the early-age concrete decks. The results obtained from the numerical models show good agreement with measured data. The present study indicates that several important parameters such as ambient temperature, solar radiation, and differential shrinkage affect greatly the total stresses arising in the concrete decks at early ages. It was shown that the simplified uniform shrinkage without considering moisture diffusion and drying at exposed surface underestimates greatly the tensile stresses at the surface region of concrete decks, which is unconservative in controlling the transverse cracking. The method of analysis in this study can be efficiently used to perform such functions, which are very important for control of cracking at early ages.
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Oh, B.H., Choi, S.C. (2006). ADVANCED ANALYSIS OF STRESSES FOR CONTROL OF TRANSVERSE CRACKING IN EARLY-AGE CONCRETE DECKS OF COMPOSITE BRIDGES. In: KONSTA-GDOUTOS, M.S. (eds) Measuring, Monitoring and Modeling Concrete Properties. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5104-3_31
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DOI: https://doi.org/10.1007/978-1-4020-5104-3_31
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