Hardfill坝横向地震反应分析的剪切楔法

基于一维剪切楔理论,导出Hardfill坝自振频率和振型的计算公式,并采用一个简化等效体系计算动水压力引起的坝体自振频率和振型的变化.在此基础上,利用反应谱法计算Hardfill坝的地震动力反应.通过算例分析,比较剪切楔法与有限元法计算所得坝体自振特性,论证剪切楔法计算坝体地震动力反应的适用性和准确性.

Shear wedge method of lateral seismic response analysis of Hardfill dams

Formulas for computing natural frequencies and mode shapes of Hardfill dams are derived based on one-dimensional shear wedge theory;and an equivalent system is applied to calculate the influences of the hydrodynamic pressure on natural freqeuencies and mode shapes.Furthermore,the seismic dynamic responses of Hardfill dams are calculated using response spectrum method.An example is analyzed to compare the differences of natural frequencies and mode shapes between shear wedge method and FEM;and the applicability and accuracy of shear wedge method to analyze the seismic dynamic responses of Hardfill dams are illustrated.