Reducing the Earthquake Induced Damage and Risk in Monumental Structures: Experience at Ecole Polytechnique De Montreal for Large Concrete Dams Supported by Hydro-Quebec and Alcan

Léger, Pierre

doi:10.1007/978-1-4020-5656-7_11

Cited by 6 publications

(7 citation statements)

References 21 publications

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“…As earthquake motion cycles swing toward the upstream direction, the potential cracking shifts to the upper part and the base of the dam [2]. Figure 3 shows failure mechanism of concrete gravity dams under increasing intensity of earthquake ground motions adapted from [31]. As seen, under normal water level and imposed ground motion, there are some critical locations in dam where cracking may start at these locations.…”

Section: Qualitative Observationsmentioning

confidence: 99%

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Quantitative failure metric for gravity dams

Hariri-Ardebili

2014

Earthq Engng Struct Dyn

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SummaryQuantitative failure monitoring is a critical tool for safety assessment of concrete dams. This includes damage occurrence, intensity, location, number, size, and propagation pattern. Such an assessment is essential for a quantifiable prioritization of repair and will thus reduce overall cost and improve safety. This paper will address this timely topic through the nonlinear transient analysis of a dam and failure will be ascertained through a multi‐scale damage index. A damage‐plastic model for mass concrete is used, Drucker‐Prager elasto‐plastic one for the foundation, and infinite elements are used for far‐field boundaries. Water‐dam interaction is accounted for through fluid finite elements. It is determined that the proposed damage indices can indeed provide a quantitative metric for the degree of failure in gravity dams in terms of the input dynamic motion. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Qualitative Observationsmentioning

confidence: 99%

“…Figure shows failure mechanism of concrete gravity dams under increasing intensity of earthquake ground motions adapted from . As seen, under normal water level and imposed ground motion, there are some critical locations in dam where cracking may start at these locations.…”

Section: Potential Failure Modesmentioning

confidence: 99%

Quantitative failure metric for gravity dams

Hariri-Ardebili

2014

Earthq Engng Struct Dyn

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“…The opening of cracks weakens the structure, thus leading to sliding or rocking. Crack paths start from both the upstream and the downstream face of the dam and then propagate toward the core [35]. There are four main critical locations where cracks tend to start: (A) the neck area, where there is a change in the downstream face slope; (B) along lift joints at various elevations; (C) along the dam-foundation interface both near to the toe and the dam heel; (D) and at the foundation in near field of the dam.…”

Section: Failure Mechanisms and Damage Development In Concrete Damsmentioning

confidence: 99%

Dynamic structural health monitoring for concrete gravity dams based on the Bayesian inference

Sevieri

Falco

2020

J Civil Struct Health Monit

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The preservation of concrete dams is a key issue for researchers and practitioners in dam engineering because of the important role played by these infrastructures in the sustainability of our society. Since most of existing concrete dams were designed without considering their dynamic behaviour, monitoring their structural health is fundamental in achieving proper safety levels. Structural Health Monitoring systems based on ambient vibrations are thus crucial. However, the high computational burden related to numerical models and the numerous uncertainties affecting the results have so far prevented structural health monitoring systems for concrete dams from being developed. This study presents a framework for the dynamic structural health monitoring of concrete gravity dams in the Bayesian setting. The proposed approach has a relatively low computational burden, and detects damage and reduces uncertainties in predicting the structural behaviour of dams, thus improving the reliability of the structural health monitoring system itself. The application of the proposed procedure to an Italian concrete gravity dam demonstrates its feasibility in real cases.

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“…On the other hand, the performance limits and the analysis methodology are intertwined in the nonlinear performance range as very few large dams have undergone significant seismic damage in order to effectively quantify the performance limits from experience and to establish a possible relation with ground motion characteristics. The problem has been addressed in the literature by using typical damage patterns and specially developed analytical tools , by utilizing the pushover analyses for determining limit states , by using nonlinear incremental dynamic analysis (IDA) to propose damage indices on concrete arch dams , by evaluating the effects of uncertainties in the ground motions and material behavior , by assessing the uncertainties in modeling parameters utilizing fragility curves and by using endurance‐time analysis, such as the proposal for a quantitative damage index given in . These approaches focus on developing damage indices/indicators, and the variability in the ground motion is treated only on the level of spectral acceleration as an intensity measure (IM) given the complexity introduced by the analyses tools.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the relationship of seismic intensity measures and the accumulation of damage on concrete gravity dams using incremental dynamic analysis

Soysal

Binici

Arıcı

2015

Earthq Engng Struct Dyn

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Summary Nonlinear analysis tools are gaining prominence for the design and evaluation of concrete gravity dams. The performance limits of concrete gravity dams within the framework of performance based design are challenging to determine in comparison to those used for the assessments based on linear elastic analyses. The uncertainty in quantifying the behavior of these systems and the strong dependence of the behavior on the ground motion play an important role. The purpose of the study is to quantify the damage levels on a representative monolith using incremental dynamic analysis (IDA). For this purpose, the constitutive model utilized was calibrated first to the existing experimental results to verify the ability of the utilized cracking model to simulate the crack propagation process. Next, the relation between the damage levels on the monolith and the ground motion characteristics was investigated. The results of the conducted IDA showed that the engineering demand parameters (EDP) such as the crest displacement and acceleration showed weak correlation with the damage states. The spectral velocity and the peak ground acceleration were determined to be better predictors for the damage on the monolith. Copyright © 2015 John Wiley & Sons, Ltd.

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Reducing the Earthquake Induced Damage and Risk in Monumental Structures: Experience at Ecole Polytechnique De Montreal for Large Concrete Dams Supported by Hydro-Quebec and Alcan

Cited by 6 publications

References 21 publications

Quantitative failure metric for gravity dams

Quantitative failure metric for gravity dams

Dynamic structural health monitoring for concrete gravity dams based on the Bayesian inference

Investigation of the relationship of seismic intensity measures and the accumulation of damage on concrete gravity dams using incremental dynamic analysis

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