Dynamic analysis of earth dam using numerical method – a case study: Doyraj earth dam

IF 0.5 4区工程技术 Q4 ENGINEERING, GEOLOGICAL

Acta Geotechnica Slovenica Pub Date : 2021-01-01 DOI:10.18690/actageotechslov.18.1.65-78.2021

A. Mazaheri, M. Komasi, Majid Veisi, M. Nasiri

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引用次数: 4

Abstract

The precise study of the response of earth dams to earthquakes is one of the most complex issues in the field of soil structures. In this research, dynamic analysis of earth dam structures (a case study: Doyraj dam in the west of Iran) have been performed using 2D Finite Difference Method (2D F.D.M.). The aim of this study is to investigate accelerations, lateral (horizontal) and vertical displacements (i.e. settlements) due to earthquake occurrence. The results of dynamic analysis indicate that the performance of the dam is satisfactory for each one of the seismic scenarios considered in this investigation. The maximum settlements at the dam crest is considerably smaller than that of the dam freeboard, with maximum value of 540 mm, which is comparable to recommendation of the Department of Safety of Dams (DSOD). Depth of sliding surfaces is better shown in the Finn model, and the settlements based on the Finn model is about 2.5 times higher than that of Mohr model. In contrast to what is commonly accepted about earthquake acceleration (the increase in earthquake acceleration from the base to the top of the dam), it cannot generalize to all cases, and it can be limited to very strong dams or can be related to poor earthquakes.

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用数值方法进行土坝动力分析——以多拉吉土坝为例

土坝对地震反应的精确研究是土结构领域中最复杂的问题之一。本文采用二维有限差分法(2D F.D.M.)对伊朗西部多拉吉大坝结构进行了动力分析。本研究的目的是调查地震发生时的加速度、横向(水平)和垂直位移(即沉降)。动力分析结果表明，在本次调查中考虑的每一种地震情景下，大坝的性能都是令人满意的。坝顶最大沉降量明显小于干舷沉降量，最大沉降量为540 mm，与大坝安全部门(DSOD)的推荐值相当。Finn模型较好地显示了滑动面的深度，基于Finn模型的沉降比Mohr模型高约2.5倍。与人们普遍接受的地震加速度(从大坝底部到顶部的地震加速度增加)相反，它不能推广到所有情况，它可能仅限于非常坚固的大坝，也可能与弱地震有关。

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

Acta Geotechnica Slovenica 地学-工程：地质

CiteScore

1.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： ACTA GEOTECHNICA SLOVENICA aims to play an important role in publishing high-quality, theoretical papers from important and emerging areas that will have a lasting impact on fundamental and practical aspects of geomechanics and geotechnical engineering. ACTA GEOTECHNICA SLOVENICA publishes papers from the following areas: soil and rock mechanics, engineering geology, environmental geotechnics, geosynthetic, geotechnical structures, numerical and analytical methods, computer modelling, optimization of geotechnical structures, field and laboratory testing. The journal is published twice a year.