A three-dimensional elasto-plastic dynamic response procedure for concrete-faced rockfill dams
A three-dimensional elasto-plastic dynamic response procedure for concrete-faced rockfill dams
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混凝土面板堆石坝三维弹塑性动力响应程序
DOI：
10.1177/1550147718793853
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发表时间：
2018-08
影响因子：
2.3
通讯作者：
Yu Xiang
中科院分区：
文献类型：
--
作者：
Xu Bin;Zhou Yang;Liu Jingmao;Yu Xiang
等效线性动力分析是面板堆石坝地震反应分析的主要方法。然而，该方法不能直接用于地震作用下面板堆石坝的永久变形，而永久变形对面板堆石坝的动力安全评价具有重要意义。为了弥补这一差距，弹塑性动力响应程序的基础上，有限元法，以估计施工，蓄水，混凝土面板堆石坝的动力特性。堆石料采用广义塑性模型，面板与堆石料接触面采用理想弹塑性模型。为验证该方法的有效性，以某150 m高混凝土面板堆石坝为研究对象，采用《水电工程水工抗震设计规范》中的地震动模型，以0.3g峰值地面加速度为激励，对该坝的施工、蓄水过程和抗震性能进行了数值模拟。根据某面板堆石坝分步施工、水库蓄水及地震反应的数值模拟结果，分析了坝体沉降、接缝变形、面板应力及变形。结果表明，该程序可直接得到坝体在地震作用下的沉降和接缝变形。施工、蓄水和地震分析可以在一个程序中考虑。
Equivalent linear dynamic analysis is the primary method of analysis for concrete-faced rockfill dams during earthquake. However, this method cannot be directly used to estimate permanent deformation during earthquake, which is important to evaluate the dynamic safety of concrete-faced rockfill dams. To bridge this gap, an elasto-plastic dynamic response procedure based on finite element method is presented to estimate the construction, impoundment, and dynamic characteristics of concrete-faced rockfill dams. This procedure involves a generalized plasticity model for rockfill materials and an ideal elasto-plastic model for interface between concrete face slab and rockfill material. The construction, impounding process, and seismic behavior of a 150-m-tall concrete-faced rockfill dam were simulated using seismic motion based on Chinese code for seismic design of hydraulic structures of hydropower project with the peak ground acceleration of 0.3g as an excitation to validate the procedure. On the basis of the numerical simulation results of the step-by-step construction, reservoir impoundment and seismic response of a concrete-faced rockfill dam, dam settlement, joint deformation, stress, and deformation of slab were analyzed. The results indicate that the dam settlement and deformation of joint can be directly obtained by the procedure during earthquake. The construction, impoundment, and seismic analysis could be considered in one procedure.
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影响因子：
5.3
作者：
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DOI：
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发表时间：
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期刊：
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发表时间：
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期刊：
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影响因子：
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