Study on the Dynamic Response of Landslide Subjected to Earthquake by the Improved DDA Method

IF 0.8 Q3 ENGINEERING, MULTIDISCIPLINARY

Modelling and Simulation in Engineering Pub Date : 2021-03-26 DOI:10.1155/2021/6637939

Xiu-Li Zhang, Bingsen Xie, Hao Wang, Y. Jiao

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引用次数: 3

Abstract

Majiagou landslide, a major ancient landslide in Three Gorges Reservoir region, is located in the high earthquake area of southwest China. The 2013 Badong earthquake caused an obvious deformation of landslide monitored by the sliding inclinometer. A strong earthquake may induce the reactivation of ancient landslide. So, it is necessary to research the seismic dynamic response of Majiagou landslide. For this purpose, discontinuous deformation analysis (DDA), improved by introducing the artificial joint and viscous boundary, is applied in this study. The displacements at monitoring points caused by Badong earthquake are calculated and compared with the field data, verifying the numerical method and model. Further, a strong earthquake with the peak acceleration of 1 g is assumed to act on the landside, the initiation and evolution process of landslide is simulated, and the movement features of landslide are discussed. The dynamic failure of landslide and the local amplification of seismic wave can be embodied, indicating that the improved DDA provides an alternative approach for analyzing the seismic dynamic response of jointed rock.

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地震作用下滑坡动力响应的改进DDA方法研究

马家沟滑坡位于中国西南地震高发区，是三峡库区重要的古滑坡。2013年巴东地震发生后，滑坡发生了明显的变形。强烈地震可能诱发古滑坡的复燃。因此，有必要对马家沟滑坡的地震动力响应进行研究。为此，本文采用了不连续变形分析(DDA)方法，并通过引入人工节理和粘性边界进行了改进。计算了巴东地震引起的监测点位移，并与现场数据进行了对比，验证了数值方法和模型的正确性。在此基础上，假设一场峰值加速度为1g的强震作用于陆面，模拟了滑坡的发生演化过程，并对滑坡的运动特征进行了探讨。可以体现滑坡的动力破坏和地震波的局部放大，表明改进的DDA为分析节理岩体的地震动力响应提供了另一种方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Modelling and Simulation in Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

3.10%

发文量

审稿时长

18 weeks

期刊介绍： Modelling and Simulation in Engineering aims at providing a forum for the discussion of formalisms, methodologies and simulation tools that are intended to support the new, broader interpretation of Engineering. Competitive pressures of Global Economy have had a profound effect on the manufacturing in Europe, Japan and the USA with much of the production being outsourced. In this context the traditional interpretation of engineering profession linked to the actual manufacturing needs to be broadened to include the integration of outsourced components and the consideration of logistic, economical and human factors in the design of engineering products and services.