Numerical simulation of the seismic response of the Zipingpu concrete face rockfill dam during the Wenchuan earthquake based on a generalized plasticity model
Numerical simulation of the seismic response of the Zipingpu concrete face rockfill dam during the Wenchuan earthquake based on a generalized plasticity model
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基于广义塑性模型的汶川地震紫坪铺面板堆石坝地震响应数值模拟
DOI：
10.1016/j.compgeo.2012.10.010
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发表时间：
2013-04-01
影响因子：
5.3
通讯作者：
Zhou, Yang
中科院分区：
文献类型：
--
作者：
Zou, Degao;Xu, Bin;Zhou, Yang
2008年汶川地震的强烈地震动对紫坪铺面板堆石坝造成了严重破坏。顶板最大沉降量约为1.0 m，面板出现压缩破坏和接缝错动。这种破坏使得有必要了解高面板堆石坝在强震作用下的破坏模式和安全性，紫坪铺面板堆石坝在汶川地震中的反应可以作为这一目的的基准。本文采用三维动力分析方法对紫坪铺面板堆石坝进行了动力分析。堆石料采用广义塑性模型描述，而面板和垫层之间的界面采用零厚度界面单元建模，该界面单元在切向方向上采用库仑摩擦定律遵循理想弹塑性应力应变模型。对大坝变形、面板应力和面板错动进行了数值模拟，并与现场实测结果进行了比较。采用广义塑性模型，可以直接得到地震过程中大坝的残余变形，而不需要单独的半经验方法。由于强烈的震动，堆石料收缩到山谷的中心，在板片区域造成挤压破坏。施工缝的错位也被复制的数值程序。研究结果表明，基于广义塑性模型的三维有限元程序可以用来评估在强震时的动力反应的混凝土面板堆石坝。皇冠版权所有（C）2012由爱思唯尔有限公司出版。保留所有权利。
The strong ground motion of the 2008 Wenchuan earthquake in China caused considerable damage to the Zipingpu concrete face rockfill dam (CFRD). The maximum crest settlement was approximately 1.0 m, and compressive failure and joint dislocations were observed in the face slabs. This damage has made it necessary to understand the damage pattern and safety of high CFRDs subjected to strong earthquake shaking, and the response of the Zipingpu CFRD during the Wenchuan earthquake can be used as a benchmark for this purpose. In this study, a 3D dynamic procedure was employed to simulate the dynamic responses of the Zipingpu CFRD. The rockfill materials were described using a generalized plasticity model, while the interfaces between the face slabs and cushions were modeled using zero-thickness interface elements that follow a perfect elasto-plastic stress-strain model in the tangential direction using Coulomb's friction law. Dam deformation, face-slab stress, and face joint dislocations were simulated, and the results were compared with the field measurements. Using the generalized plastic model, the residual deformation of the dam during the earthquake could be directly obtained without being complemented by separate, semi-empirical procedures. The rockfill materials shrank to the center of the valley due to the strong shaking, causing crushing damage in the zone of the slabs. The dislocation of construction joints was also duplicated by the numerical procedure. The results of this study indicate that a 3D finite element procedure based on a generalized plasticity model can be used to evaluate the dynamic responses of CFRDs during strong earthquakes. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.