Analysis Model on Gradual Change Principle of Effect Zones of Layer Face for RCCD

The effect zones of layer face for roller compacred concrete dan(RCCD)have gradual changing characteristics.Based on the analysis thought of complex material,a model was built to an alyze above principle of RCCD by use of series-wound and shunt-wound connection.Some methods were proposed to determine the instantaneous elastic modulus,delayed elastic modulus and viscosity coefficient of effect zones of layer face.Above models and methods were used to mine the principle of gradual change of key calculation parameters which can respond the characteristics of effect zones. The principle of gradual change was described.A model was established to analyze the three-dimen sional viscoelastic problem of RCCD.Above programs were developed.The examples show that the proposed models and methods determining the key calculation parameters of effect zones can reflect the status of RCCD accurately.