Global sensitivity analysis of parameters in Duncan-Chang E-B model based on improved response surface

(1.College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;2.Central Yunnan Provincial Water Diversion Project Co., Ltd., Kunming 650051, China;3.Huai’an District Yunxi Water Management Institute, Huai’an 223299, China)

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    In order to study the influence of Duncan-Chang E-B model parameters and their interactions on dam deformation, the global sensitivity of parameters in Duncan-Chang E-B model was studied using the improved response surface method for a homogeneous loess dam. Firstly, five parameters including R f, γ, φ 0, K b and K , which have significant influence on the deformation of earth dam were screened out by fractional factorial design. Then the central composite design in the response surface method was used to conduct further global response surface analysis on the screening results and investigate the influence of parameters and their interaction on the deformation of earth dams. The results show that R f, γ and φ 0 are the three most sensitive parameters to dam displacement, and the interaction between them is also significantly sensitive to dam deformation, which is greater than the sensitivity of a single factor. Therefore, the interaction between the parameters should be considered in similar engineering calculations.

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冯亚新,江兆强,孙一清,等.基于改进响应面的邓肯张E-B模型参数全局敏感性分析[J].水利水电科技进展,2023,43(2):44-50, 81.(FENG Yaxin, JIANG Zhaoqiang, SUN Yiqing, et al. Global sensitivity analysis of parameters in Duncan-Chang E-B model based on improved response surface[J]. Advances in Science and Technology of Water Resources,2023,43(2):44-50, 81.(in Chinese))

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  • Received:May 25,2022
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  • Online: March 10,2023
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