Deterministic Seismic Damage Analysis for Concrete Gravity Dams: A Case Study of Oued Fodda Dam

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-06-25 DOI:10.2478/ama-2023-0039

D. Ouzandja, A. Berrabah

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Abstract

Abstract One of the major dangers for seismic damage of concrete dams is the propagation of cracks in dam concrete. The present study undertakes a numerical investigation of the seismic damage for Oued Fodda concrete gravity dam, located in the northwest of Algeria, considering the impacts of properties of joints along the dam-foundation rock interface and cross-stream earthquake excitation. Three-dimensional transient analyses for coupled dam-foundation rock system are carried out using Ansys software. The hydrodynamic effect of reservoir fluid is modelled using the added mass approach. The smeared crack approach is utilised to present the seismic damage of dam concrete using the Willam and Warnke failure criterion. The dam-foundation rock interface joints are presented with two ways, adhesive joints and frictional joints. The Drucker–Prager model is considered for dam concrete in nonlinear analyses. Consideration of the study results indicates that the frictional joints model can reduce the seismic response and damage hazard of the dam body to a better extent compared with the adhesive joints model. Furthermore, the application of cross-stream earthquake excitation reveals the significant effect on cracking response of the dam in the two models of joints.

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混凝土重力坝的确定性地震损伤分析——以Oued Fodda大坝为例

摘要混凝土大坝地震破坏的主要危险之一是大坝混凝土中裂缝的扩展。本研究对位于阿尔及利亚西北部的Oued Fodda混凝土重力坝的地震损伤进行了数值研究，考虑了坝基-岩石界面接缝特性和跨流地震激励的影响。利用Ansys软件对大坝-基岩耦合系统进行了三维瞬态分析。储层流体的流体动力学效应采用附加质量法进行建模。涂抹裂缝法用于采用Willam和Warnke破坏准则来表示大坝混凝土的地震损伤。坝基岩石界面节理分为粘性节理和摩擦节理两种。大坝混凝土的非线性分析考虑了Drucker–Prager模型。考虑研究结果表明，与粘性节点模型相比，摩擦节点模型可以更好地降低坝体的地震反应和破坏危险。此外，横流地震激励的应用表明，在这两种节理模型中，对大坝的开裂反应有显著影响。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.