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原文传递 Comparative Study of Cumulative Damage to Pavement Concrete Under Splitting Tensile, Variable Amplitude Fatigue Loadings.

题名：	Comparative Study of Cumulative Damage to Pavement Concrete Under Splitting Tensile, Variable Amplitude Fatigue Loadings.
作者：	Yun-Kyong-Ku; Kim-Dong-Ho; Jeong-Won-Kyong; Won-Chimoon
关键词：	Aggregates-; Compressive-strength; Concrete-; Curvature-; Deflection-; Florida-; Mathematical-models; Modulus-of-elasticity; Regression-analysis; Specific-gravity; Structural-members; Weight-
摘要：	The current empirical model for the Florida Department of Transportation (FDOT) concrete modulus of elasticity (E) is a function of concrete compressive strength and unit weight. Recent testing shows that this model consistently underestimates E for FDOT concrete. This underestimation may lead to construction problems caused by the overprediction of camber and the deflection of concrete structural members. E values for the typical concrete mix used in FDOT projects were experimentally determined at various concrete ages. Regression analyses were used to find the E models that best fit the generated data, and such models were compared with existing E models from the literature. It was found that the aggregate type and specific gravity play significant roles in influencing the E value of concrete. The best-fit E models for FDOT concrete, together with suggested modification factors for various aggregate types, are recommended.
总页数：	Transportation Research Record: Journal of the Transportation Research Board. 2005. (1914) pp15-23 (1 Phot., 4 Fig., 8 Tab., 16 Ref.)
报告类型：	科技报告