An efficient concrete plastic damage model for crack propagation in gravity dams during seismic action

IF 1.5 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Trong Nghia-Nguyen, Le Thanh Cuong, Samir Khatir, Le Minh Hoang, Salisa Chaiyaput, Magd Abdel Wahab
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引用次数: 0

Abstract

Purpose

Concrete gravity dams are important structures for flood control and hydraulic power generation, but they can be vulnerable to seismic activity due to ground movements that trigger crack propagation.

Design/methodology/approach

To better understand the factors that affect the stability of concrete gravity dams against concrete fracture during earthquakes, a concrete plastic damage model has been utilized with two new expressions to simulate compressive and tensile damage variables.

Findings

The findings showed that the crack patterns were strongly influenced by the concrete’s strength. The simulation results led to the proposal of appropriate concrete properties aimed at minimizing damage. These findings, together with the proposed model, offer significant insights that can enhance the safety and stability of concrete gravity dam structures.

Originality/value

This study offers a comprehensive analysis of concrete behavior under varying grades and introduces simple and robust expressions for evaluating concrete parameters in plastic damage models. The versatility of these expressions enables accurate simulation of stress-strain curves for different grades, resulting in excellent agreement between model results and experimental findings. The simulation of the Koyna Dam case study demonstrates a similarity in crack patterns with previous simulations and field observations.

地震作用下重力坝裂缝扩展的高效混凝土塑性破坏模型
目的 混凝土重力坝是防洪和水力发电的重要结构,但在地震活动中很容易因地面运动而引发裂缝扩展。为了更好地了解影响混凝土重力坝在地震中防止混凝土断裂的稳定性的因素,我们利用混凝土塑性破坏模型和两个新的表达式来模拟压缩和拉伸破坏变量。模拟结果提出了适当的混凝土属性,旨在最大限度地减少损坏。这些研究结果以及所提出的模型为提高混凝土重力坝结构的安全性和稳定性提供了重要依据。这些表达式的多功能性使其能够准确模拟不同等级的应力-应变曲线,从而使模型结果与实验结果非常一致。Koyna 大坝案例研究的模拟结果表明,裂缝模式与之前的模拟结果和现场观测结果相似。
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
Engineering Computations
Engineering Computations 工程技术-工程:综合
CiteScore
3.40
自引率
6.20%
发文量
61
审稿时长
5 months
期刊介绍: The journal presents its readers with broad coverage across all branches of engineering and science of the latest development and application of new solution algorithms, innovative numerical methods and/or solution techniques directed at the utilization of computational methods in engineering analysis, engineering design and practice. For more information visit: http://www.emeraldgrouppublishing.com/ec.htm
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