Application Of Grey System Theory In The Diagonal Shear Strength Of Pre-Stressed Concrete Structural Deign

Based on the test data of hundreds of pre-stressed concrete beams, this paper studies the factors that influence the ultimate shear strength of those beams. And those factors have been analyzed by correlation analysis of grey system theory. The analysis result shows that which is the first factor influences the ultimate shear strength and which one is the next. We chose the factors who have the better correlation, using the analytic hierarchy process(AHP), and decide the weigh of the factors . And then the specimen-data-base has been analyzed by regression analysis with increased-weigh. At last an experienced-formula, based on the grey-system theory, has been got. And the calculated-result of this experienced-formula is identical better to the measured-result.The conclusion of this paper shows that the application of grey system theory in reinforced concrete structural deign is practicable, and the prospect of the application is remarkable.