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基于搜集的国内多座土石坝堆石料的动力试验成果,研究了堆石料的振动残余变形特性。在整理试验数据过程中,尝试对沈珠江模型进行改进,改进模型充分考虑固结比对堆石料振动残余变形特性的影响,并能更好地拟合试验数据。通过对理想面板堆石坝进行地震动残余变形计算,对比分析了与沈珠江模型、孔宪京改进模型以及凌华改进模型的异同,阐述了本次改进模型的合理性。此外,在统计大量试验数据的基础上,给出了cvr-rd与cdr/S12-rd关系曲线的平均线及上、下包络线,采用该统计曲线对理想面板堆石坝进行了地震残余变形敏感性分析。计算结果表明:参数c4、c5对坝体残余变形影响较大,参数c1、c2影响程度较小;选取均值曲线参数可应用于缺乏动力试验的中小型土石坝抗震设计。
Based on the collected dynamic test results of rockfill dams in China, the residual deformation characteristics of rockfill materials were studied. In order to improve the model of Shenzhujiang, the influence of consolidation ratio on the residual deformation characteristics of rockfill materials and the better fitting of experimental data are tried to improve the model. Through the calculation of the residual deformation of the ideal concrete face rockfill dam, the similarities and differences between Shenzhujiang model, KONG Xian-jing model and ADLINK model are analyzed and compared. The rationality of this improved model is expounded. In addition, on the basis of a large amount of experimental data, the average line and the upper and lower envelopes of the curve of cvr-rd and cdr / S12-rd are given, and the statistical curve is used to carry out the seismic residuals of the ideal concrete face rockfill dam Deformation sensitivity analysis. The calculation results show that parameters c4 and c5 have a great influence on the residual deformation of the dam, and the influence of the parameters c1 and c2 is small. The mean value curve parameter can be applied to the seismic design of small and medium earth-rockfill dams without dynamic test.