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《China Civil Engineering Journal》 2006-10
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Experimental study on the long-term behavior of self-compacting concrete beams

Yu Zhiwu Liu Xiaojie(Central South University,Changsha 410075,China)  
This paper reports the test results of 13 self-compacting concrete(SCC) beams.The effects of the degree of solidification of concrete at early stage of loading,the prestress force and the degree of indeterminacy on the long-term behavior of self-compacting concrete beams are investigated.Experimental study and theoretical analysis indicate that:(1) the variability of test results for the same group of SCC beams is very small,attributing to the good quality of SCC,(2) the degree of solidification of concrete at early age of loading,the prestress force and the degree of indeterminacy have great impacts on the long-term behavior of self-compacting concrete beams,(3) the deflection creep coefficient of SCC beams is between 1.0 and 1.8,thus extra preventions considering shrinkage and creep behavior are probably not needed,and(4) the test beams are modeled by section analysis using a modified MC 90 creep and shrinkage model and a age-adjusted effective modulus method.The calculated results agree well with the tests.
【Fund】: 国家自然科学基金(50278097)
【CateGory Index】: TU375.1
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