| 宋来福,孔宪京,徐斌,庞锐.基于Copula函数的土石坝三维坝坡稳定可靠度分析[J].,2021,61(1):92-103 |
| 基于Copula函数的土石坝三维坝坡稳定可靠度分析 |
| Reliability analysis of 3D rockfill dam slope stability based on Copula function |
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| DOI：10.7511/dllgxb202101013 |
| 中文关键词: 相关性 不完备概率信息 可靠度 Copula 联合概率分布 |
| 英文关键词: correlation incomplete probability information reliability Copula joint probability distribution |
| 基金项目:国家重点研发计划资助项目(2017YFC0404904)；国家自然科学基金资助项目(519790265177903451679029). |
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| 中文摘要: |
| 不完备概率信息条件下边坡稳定可靠度评价是岩土工程新兴的热点问题之一，其关键难点在于如何在不完备概率信息条件下有效地建立符合抗剪强度参数分布特征的联合概率分布模型．在考虑堆石料非线性强度参数不完备概率信息条件下，采用Copula函数建立非线性强度参数联合分布模型，结合径向基神经网络(RBFN)提出了土石坝坝坡稳定系统可靠度分析智能响应面法，并通过实例验证了其可行性与有效性．最后，基于所建的智能响应面，系统研究了Copula函数类型与样本数量对土石坝坝坡稳定系统可靠度的影响规律． |
| 英文摘要: |
| The evaluation of slope stability reliability under the condition of incomplete probability information is one of the most popular issues in geotechnical engineering. The key difficulty in the issue lies in how to effectively establish a joint probability distribution model that conforms to the distribution characteristics of shear strength parameters under the condition of incomplete probability information. Based on the incomplete probability information of the nonlinear strength parameters of rockfill, the joint distribution model of the nonlinear strength parameters is established using the Copula function. Combined with a radial basis function network (RBFN), an intelligent response surface method for reliability analysis of rockfill dam slope stability system is proposed. Its feasibility and validity are demonstrated through an example. The influences of Copula function type and sample number on the reliability of stability system of rockfill dam slope are systematically studied based on the constructed intelligent response surface. |
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