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对堆石料的UH模型进行了不同应力路径的适应性验证,结果表明,该模型在反映堆石料等比例加载时与试验规律存在一定误差,分析认为,原始UH模型的剪胀特征线假定不符合堆石料的变形规律。文中采用了新的塑性势面将原始的UH模型改进为服从非关联的流动法则,修正后的模型对各个应力路径的预测精度明显提高。按照类似的方式,对堆石料的UH动力模型进行了修正,并将修正后的UH动力模型用于预测花岗岩堆石料在循环剪切荷载下的累计变形现象,模型预测结果与试验规律能够较好吻合。
The adaptability of different stress paths to UH model of rockfill materials is verified. The results show that the model has some errors when compared with the test law when it reflects the ratio loading of rockfill materials. It is considered that the dilatancy characteristic line of the original UH model does not fit Deformation law of rockfill. In this paper, a new plastic potential surface is adopted to improve the original UH model to obey the non-associated flow rule. The accuracy of the revised model for each stress path is significantly improved. In a similar way, the UH dynamic model of rockfill materials was modified, and the modified UH dynamic model was used to predict the cumulative deformation of granite rockfill material under cyclic shear loading. The prediction results and experimental rules of the model were better Anastomosis.