Seismic assessment of a monolithic RCC gravity dam including three dimensional dam–foundation–reservoir interaction

Yilmazturk, Sema; Arıcı, Yalin; Binici, Barış

doi:10.1016/j.engstruct.2015.05.041

Cited by 25 publications

(14 citation statements)

References 13 publications

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“…The consideration of the DFRI in a 3D setting was initiated with the concern for the behavior of arch dams. Such analyses have been utilized for RCC dams lacking any expansion joints [14][15][16]. Such analyses have been utilized for RCC dams lacking any expansion joints [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, despite the early evaluations of Rashed and Iwan [13], who pointed out the need of 3D analyses for the seismic design of dams in narrow canyons, 3D analyses were rarely employed in the design of gravity dams. Such analyses have been utilized for RCC dams lacking any expansion joints [14][15][16]. In spite of the development of the 3D procedures, the provisions for the seismic design and evaluation of gravity dams [17,18] are mostly based on 2D model considerations [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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The use of 3D modeling for the prediction of the seismic demands on the gravity dams

Bybordiani

Arıcı

2017

Earthq Engng Struct Dyn

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Summary Seismic behavior of gravity dams has long been evaluated using a representative two‐dimensional (2D) system. Formulated for the gravity dams built in wide canyons, the assumption is nevertheless utilized extensively for almost all concrete dams due to the established procedures as well as the expected computational costs of a three‐dimensional model. However, a significant number of roller‐compacted concrete dams, characterized as such systems, do not conform to the basic assumptions of these methods by violating the conditions on canyon dimensions and joint‐spacing/details. Based on the premise that the 2D modeling assumption is overstretched for practical purposes in a variety of settings, the purpose of this study is to critically evaluate the use of 2D modeling for the prediction of the seismic demands on these systems. Using a rigorous soil–structure interaction approach, the difference between the two and three‐dimensional response for gravity dams was investigated first in the frequency domain for a range of canyon widths and foundation to dam moduli ratios. Then, the time domain differences between the crest displacements and the maximum principal stress were obtained using 70 different ground motions in order to show the possible bias introduced into the analysis results due to the modeling approach. The results of the study show that even for relatively wide canyons, the 2D analysis can lead to misleading predictions. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The use of 3D modeling for the prediction of the seismic demands on the gravity dams

Bybordiani

Arıcı

2017

Earthq Engng Struct Dyn

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“…The dynamic behavior of gravity dams must be evaluated by analyzing the seismic influence on the dam considering the interaction effect of the dam-reservoir-foundation system. These interactions are complicated by many assumptions and factors involved in analyzing the performance of gravity dams [109]. These factors include the foundation/dam modulus of elasticity ratio, the dam-reservoir-foundation material damping, and the bottom absorption with reservoir compressibility.…”

Section: Vibration Effect On Dam Bodymentioning

confidence: 99%

“…The effects of water depth, abutments, and foundation on model parameters were investigated along with the dam-foundation interaction [136]. Yilmazturk et al [109] analyzed 2D and 3D FE numerical models that represent an RCC gravity dam by applying the EAGD-84 program (Earthquake analysis of concrete gravity dams), and the vertical stress, principal stress, maximum displacement, and frequency parameters were calculated. The 2D and 3D model results were compared to underline the calculated parameters that were used to evaluate the dynamic behaviors of the gravity dam and the dam should be tested for seismic safety assessment [109].…”

Section: D Dam Modelingmentioning

confidence: 99%

State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

Yaseen‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

Ameen

Aldlemy

et al. 2020

Sustainability

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Dam and powerhouse operation sustainability is a major concern from the hydraulic engineering perspective. Powerhouse operation is one of the main sources of vibrations in the dam structure and hydropower plant; thus, the evaluation of turbine performance at different water pressures is important for determining the sustainability of the dam body. Draft tube turbines run under high pressure and suffer from connection problems, such as vibrations and pressure fluctuation. Reducing the pressure fluctuation and minimizing the principal stress caused by undesired components of water in the draft tube turbine are ongoing problems that must be resolved. Here, we conducted a comprehensive review of studies performed on dams, powerhouses, and turbine vibration, focusing on the vibration of two turbine units: Kaplan and Francis turbine units. The survey covered several aspects of dam types (e.g., rock and concrete dams), powerhouse analysis, turbine vibrations, and the relationship between dam and hydropower plant sustainability and operation. The current review covers the related research on the fluid mechanism in turbine units of hydropower plants, providing a perspective on better control of vibrations. Thus, the risks and failures can be better managed and reduced, which in turn will reduce hydropower plant operation costs and simultaneously increase the economical sustainability. Several research gaps were found, and the literature was assessed to provide more insightful details on the studies surveyed. Numerous future research directions are recommended.

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“…In this case, performing detailed nonlinear analysis is required. Application of these linear analysis based criteria on concrete dams (gravity, arch, and buttress) and their partial calibration with nonlinear models can be found in [24][25][26][27][28][29][30][31][32].…”

mentioning

confidence: 99%

Probabilistic Identification of Seismic Response Mechanism in a Class of Similar Arch Dams

Hariri-Ardebili

Heshmati²,

Boodagh

et al. 2019

Infrastructures

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Different numerical models have been proposed for seismic analysis of concrete dams by taking into account the nonlinear behavior of concrete and joints; interaction between the dam, foundation, and reservoir; and other seismic hazard considerations. Less focus, however, has been placed on the real seismic performance of the dams and their relative correlation. This paper investigates the linear and nonlinear seismic performance of two similar high arch dams with relatively different response mechanisms. The response correlation is performed from statistical and probabilistic points of view. Similarities and differences are highlighted, and the best practice to compare the responses in a class of dams is presented. It is found that some demand parameters and seismic intensity measures can reduce the dispersion of the results and increase the correlation. In general, the dam geometry has a direct relation with the deformation and spatial distribution of potential damaged area. However, it is not related to the localized damage at the most critical location. Moreover, the real crack pattern (from nonlinear analysis) is more discrete compared to the continuous overstressed/overstrained regions (from linear analysis).

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Seismic assessment of a monolithic RCC gravity dam including three dimensional dam–foundation–reservoir interaction

Cited by 25 publications

References 13 publications

The use of 3D modeling for the prediction of the seismic demands on the gravity dams

The use of 3D modeling for the prediction of the seismic demands on the gravity dams

State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

Probabilistic Identification of Seismic Response Mechanism in a Class of Similar Arch Dams

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