大坝安全分析中时效模型的改进及其应用

Improvement and Application of Time-effect Model for Dam Safety Analysis

从混凝土徐变机理和弹性力学理论出发,导出了一种能反映水位变化、水位变化率、温度变化、时间等外部因素及混凝土徐变内部因素共同作用下的综合时效模型。利用该模型综合分析了某拱坝垂直位移中时效位移的组成及其变化规律。在实际应用中,利用该模型分离出的时效位移为正确评价大坝工作性态提供了良好的参考。

A synthetic time-effect model, which can reflect the water level change and its rate, the temperature change, time change and concrete creep, is deduced from the creep mechanism and elastic mechanics theory. The model is applied to the analysis of the composition of vertical time-effect displacement and the regularity of its change for an arch dam. In practice, the time-effect displacement separated by this model offers a reference to the evaluation of the dam behavior.