Probabilistic Assessment of Earthen Levees Considering Soil Spatial Variability
Probabilistic Assessment of Earthen Levees Considering Soil Spatial Variability
复制标题
DOI：
10.1061/9780784484999.013
复制
发表时间：
2023-07
期刊：
影响因子：
--
通讯作者：
Weiwei Zhan;L. Zhang;Lei Wang
中科院分区：
文献类型：
--
作者：
Weiwei Zhan;L. Zhang;Lei Wang
土堤是沿水道修建的重要的防洪土质构筑物。许多堤坝已经超过了它们的设计寿命。这些防洪堤在洪水灾害条件下的可靠性至关重要，因为一旦发生故障，可能会造成灾难性的后果，并对社区造成严重损害。利用子域采样和有限差分方法，提出了考虑土壤空间变异性的土方防洪堤可靠性评估的概率方案。基于有限差分模型的离散化和随机场理论，将土壤参数空间变异性的影响明确地考虑在内。为了提高计算效率，样本将在不确定输入变量空间中划分的一组子域中生成。通过实例分析，验证了所提出的土堤概率评估框架的有效性。研究了不同波动尺度和洪水高程对土堤可靠度的影响。本文的研究结果可为土方堤防的可靠性评估和风险决策提供参考。
Earthen levees are important earthen structures built along waterways for flood protection. Many of the levees have lived out their design life. The reliability of these levees under flooding hazard conditions is critical since the failure can be catastrophic and cause serious damage to the community. The paper aims to present a probabilistic scheme to evaluate the reliability of earthen levees considering the soil spatial variability using the subdomain sampling and finite difference methods. The effect of spatial variability of soil parameters will be explicitly incorporated based on a discretization of the finite difference model and the random field theory. The samples will be generated in a set of subdomains partitioned in the space of uncertain input variables to improve computational efficiency. A case study is utilized to demonstrate the effectiveness of the proposed framework for probabilistic assessment of earthen levees. The effects of different scales of fluctuation and flood water elevations on the reliability of earthen levees are also studied. The results from this paper can provide useful insights for practitioners to evaluate the reliability of the earthen levees and make a risk-informed engineering decision.