Corps of Engineers Practice in the Evaluation of Seismic Deformation of Embankment Dams
Corps of Engineers Practice in the Evaluation of Seismic Deformation of Embankment Dams
复制标题
工程兵团在堤坝地震变形评估中的实践
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Beaty
中科院分区：
文献类型：
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作者：
V. Perlea;M. Beaty
《工程兵团指南》要求在评估现有大坝的地震荷载和验证地震缺陷堤防的补救设计时使用地震变形分析。该部队采用分阶段的方法来评估地震安全性。对于具有重大地震荷载，问题土壤，高风险或简单分析确定地震问题的水坝，通常需要更高级的变形分析。这些分析的一个主要挑战是，当存在可液化材料时，选择可靠的本构模型。计算机程序FLAC与修改版本的UBCSAND本构模型相结合，在确定部队堤防大坝抗震改造的必要性和选择有效的补救方案方面发挥了重要作用。本文的主要目的是描述兵团在应用分阶段分析方法方面的当前实践，并讨论在执行这些分析时所选择的考虑因素。
Guidance for the Corps of Engineers requires the use of seismic deformation analysis in the evaluation of existing dams for seismic loads and in the validation of remediation design for seismically deficient embankment dams. The Corps uses a phased approach for evaluating the seismic safety. For dams with significant seismic loads, problem soils, high risk, or those where simple analyses identified seismic concerns, a more advanced deformation analysis is generally required. A major challenge in these analyses is the selection of a reliable constitutive model when liquefiable materials are present. The computer program FLAC, in conjunction with a modified version of the UBCSAND constitutive model, has been instrumental in determining the necessity of seismic retrofit at Corps’ embankment dams and in selecting effective remediation alternatives. The primary objective of this paper is to describe the current practice of the Corps in applying a phased analysis approach and to discuss selected considerations in performing these analyses.