Seismic analysis of hydraulic structures affected by alkali-aggregate reaction: a case study

Parvini, Mehdi; Pietruszczak, S.; Gocevski, Vladimir

doi:10.1139/l00-116

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…They conducted the dynamic analysis after a period of transient static one (considering AAR phenomenon). The analyses with AAR involved only the pre-earthquake duration; meanwhile, the postearthquake analysis was not included in the study [5].…”

Section: Introductionmentioning

confidence: 99%

Simulating Structural Responses of a Generic AAR-Affected Arch Dam Considering Seismic Loading

Lamea

Mirzabozorg

2017

Scientia Iranica

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Abstract. Alkali-Aggregate Reaction (AAR) is a deteriorative phenomenon for concrete that a ects the performance of structures. This study focuses on seismic and postearthquake behaviors of an AAR-a ected dam. A computer program is developed for simulating the structural behavior of AAR-a ected dams including the seismic and postearthquake durations. A thin high double-curvature arch dam is selected as a case study and is modelled in a series of analyses within the assumed 30-year operating period. Each analysis includes an earthquake excitation in a di erent speci ed time. In each analysis, the seismic record is applied to the dam at di erent statuses of AAR progression, considering the proposed ARI index. The results show that AAR a ects seismic performance of the dam, i.e., with the AAR progression, the dynamic responses are signi cantly changed. On the other side, the e ect of earthquake occurrence time on the dam post-earthquake behavior is not noticeable. This may be explained by the linear elastic behavior assigned to the body material in the provided FE model.

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Section: Introductionmentioning

confidence: 99%

Simulating Structural Responses of a Generic AAR-Affected Arch Dam Considering Seismic Loading

Lamea

Mirzabozorg

2017

Scientia Iranica

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“…In the case of hydraulic structures, the most notable non-mechanical loads include the annual changes in temperature of the water in the river, drying shrinkage of the concrete during the construction as well as hydration heat [4]. In addition, chemical causes like alkali-aggregate reaction (AAR) affect the durability and serviceability of hydraulic structures by the effect of deterioration of concrete characteristics [1], [2], [5]. As the evidence suggests, one of the major non-mechanical loads is an annual fluctuation in temperature of water [3], [6].…”

Section: Introductionmentioning

confidence: 99%

State of Strength in Massive Concrete Structure Subjected to Non-Mechanical Loads

Łydżba

Sobótka

2015

Studia Geotechnica Et Mechanica

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The paper deals with an impact of non-mechanical loads on the state of strength in massive concrete hydraulic structures. An example of hydroelectric plant subjected to the effect of water temperature annual fluctuation is considered. Numerical analysis of transient thermal-elasticity problem was performed. After determining the temperature distributions within the domain, the Duhamel-Neumann set of constitutive equations was employed to evaluate fields of mechanical quantities: displacement, strain and stress. The failure criterion proposed by Pietruszczak was adopted in assessing whether the load induces exceeding of strength of concrete within the structure volume. The primary finding is that the temperature effect can lead to damage of concrete in draft tubes and spirals, especially in winter months.

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“…Parvini et al investigated seismic behavior of an AAR affected hydraulic structure as a case study. They performed the dynamic analysis after a period of transient static analysis (with consideration of AAR phenomenon), but the effects of solar radiation were not considered during the analysis [7]. Noorzaei et al analyzed a RCC dam using finite element approach.…”

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confidence: 99%

Evaluating Sensitivity of an AAR-Affected Concrete Arch Dam to the Effects of Structural Joints and Solar Radiation

Lamea

Mirzabozorg

2015

Strength Mater

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Alkali aggregate reaction may affect the ultimate strength and structural performance of wet concrete structures such as arch dams. In addition to chemically-dependent factors, such as alkali aggregate reactivity, humidity, the mixture materials, etc., some other parameters intensify the complexity of the reaction simulation. In this regard, structural responses, i.e., stress values, cracks and their distributions, as well as thermal status of the damaged structures are known significant factors. The accuracy and quality of modeling for the aforementioned factors, may affect the validity of performed simulations. Contraction joints impress the structural reactions and solar radiation mainly impresses the dam thermal distribution. In the present paper, effects of both mentioned parameters during simulating the performance of a double-curvature concrete arch dam suffering from alkali aggregate reaction are evaluated. A computer program previously developed by the authors is utilized for modeling the selected case study. In addition to the final step results, the histories of structural responses during the dam life time are accounted for. The final results show high importance of both phenomena when stresses are evaluated but, the effect of solar radiation is ignorable when only crest displacements are considered. However, the deduction is somehow different when responses of a middle step are compared. Such differences would be more impressive to final results when nonlinear materials are assigned to the model and may be a shortcoming for the simulations in which the material behavior is assumed linear-elastic.

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Seismic analysis of hydraulic structures affected by alkali-aggregate reaction: a case study

Cited by 5 publications

References 10 publications

Simulating Structural Responses of a Generic AAR-Affected Arch Dam Considering Seismic Loading

Simulating Structural Responses of a Generic AAR-Affected Arch Dam Considering Seismic Loading

State of Strength in Massive Concrete Structure Subjected to Non-Mechanical Loads

Evaluating Sensitivity of an AAR-Affected Concrete Arch Dam to the Effects of Structural Joints and Solar Radiation

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