Time-domain analyses of three-dimensional dam-reservoir interactions by BEM and semi-analytical method

Tsai, C. S.; Lee, G.C.; Yeh, Ching‐Ming

doi:10.1016/0955-7997(92)90039-a

Cited by 14 publications

(8 citation statements)

References 29 publications

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“…After conducting the analysis, the sensitivity of seismic responses of horizontal displacement of the dam crest, the maximum and minimum principal stresses in the toe and heel of the dam and the maximum hydrodynamic pressure in the reservoir related to Ÿ parameter were extracted using ANSYS Software. The sensitivity of seismic responses to Ÿ parameter affected by EL Centro Earthquake have been represented in figures (3) to (7).…”

Section: Model Analysis and Results Evaluationmentioning

confidence: 99%

“…Saini et al (1978) [2] and Chopra and Chakrabarti (1981) [3] studied the dam-reservoir interaction problem in the frequency domain using the finite element model. Finite element analyses in time-domain were performed by 1986) [4][5][6] and Tsai et al (1992) [7]. For the reservoir with irregular geometry, numerical methods such as finite element method must be used, because an analytical solution cannot obtain the results for the arbitrary boundary and geometry of the system.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the effect of reservoir length on seismic behavior of concrete gravity dams using Monte Carlo method

Khiavi

Ghorbani

Kouchaki

2020

NMCE

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In present study, the effect of reservoir length on seismic performance of concrete gravity dam has been investigated. Monte Carlo probabilistic analysis has been used to achieve a sensitivity of the responses to variation of truncated reservoir length in finite element model. The ANSYS software based on finite element method is applied for modeling and analysis. The Pine Flat dam in California, under components of El Centro, San Fernando and North Ridge earthquake, is modeled as a case study to evaluate the effect of reservoir length on seismic behavior and optimization. The foundation flexibility has been considered in modeling and Sommerfeld boundary condition has been used for reservoir truncated boundary condition. In Monte Carlo probabilistic analysis, the reservoir length has been considered as input variable and maximum dam crest displacement, maximum hydrodynamic pressure in reservoir and maximum tensile principal stress in heel and compressive principal stress in toe of dam have been selected as output parameters. The Latin Hypercube sampling method has been applied with unique distribution function for input variable. Obtained results show the sensitivity of output responses to variation of reservoir length. Considering sensitivity results, it is possible to select the optimum length of reservoir for finite element model.

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Section: Model Analysis and Results Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of reservoir length on seismic behavior of concrete gravity dams using Monte Carlo method

Khiavi

Ghorbani

Kouchaki

2020

NMCE

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“…Dams are among the most significant engineering buildings, the resistance of these against severe earthquake loads will prevent catastrophic damages on humans, ecology, and economy. Therefore, the dynamic analysis of dams has previously been studied using a variety of methodologies, including the Boundary Element Method (BEM) (Domínguez and Medina 1989;Medina and Domínguez 1989;Dominguez and Meise 1991;Tsai et al 1992;Maeso and Domínguez 1993;Küçükarslan 2004b;Küçükarslan 2004a), Finite Element Method (FEM) (Chopra and Chakrabarti 1971;Gutierrez and Chopra 1978;Akkas et al 1979;Hacıefendioğlu et al 2007;Hacıefendioğlu 2009;Akköse and Şimşek 2010;Bayraktar et al 2011;Azizan et al 2017;Gorai and Maity 2021), and FEM-BEM (Touhei and Ohmachi 1994;Abouseeda and Dakoulas 1998;Yaseri and Konrad 2021). The reservoir domain has been modeled by using Eulerian (Chopra and Chakrabarti 1971;Gogoi and Maity 2007;Alembagheri 2016;Gorai and Maity 2019), Lagrangian (Akkas et al 1979;Wilson and Khalvati 1983;Hacıefendioğlu 2009;Akköse and Şimşek 2010;Bayraktar et al 2011;Hacıefendioğlu et al 2012) or Added Mass (Westergaard 1933;Kuo 1982;Zhang et al 2013) approach and boundary condition (Sommerfeld 1949;Sharan 1985;Higdon 1991;Kellezi 2000;Pelecanos et al 2013;…”

Section: Introductionmentioning

confidence: 99%

Seismic performance evaluation of concrete gravity dams using an efficient finite element model

Rasa

Budak

Düzgün

2022

Preprint

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The effective numerical model that examines the seismic behavior of concrete gravity dams in the Laplace domain-Finite Element (FE) approach is presented. Further research on the potential damage levels and seismic performance of the dam body is done considering the simultaneous effect of horizontal (H) and vertical (V) components of six different earthquake loads. The time durations of the selected earthquakes vary from 10 sec to 80 sec with the magnitude range from 6.5 to 7.62 Mw. The Lagrangian fluid finite elements are utilized to model the near-field water domain. On the other hand, the fluid infinite elements are utilized to model the far-field water domain considering the rigid base rock foundation condition. The two-dimensional (2D) model is developed in FORTRAN 90 and MATLAB programming languages. The findings of this study suggest that the seismic behavior of concrete gravity dam affects not only with the seismic severity; the length and significant time duration of the earthquake are also important factor. The evaluation of the obtained results revealed that the longer length of significant earthquake duration leads to the high deformations, the high stress excursions and high probability of damages in the dam. 20.9% and 18.8% of the selected dam cross section experiences overstress condition under the H and H + V components of the Chi-Chi earthquake loads, respectively; which result the dam failure.

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“…Saini et al (1978) [13] and Chopra -Chakrabarti (1981) [5] studied the dam-reservoir interaction problem in the frequency domain using the finite element model. Finite element analyses in time-domain were performed by 1986) [14, 15 and 16] and Tsai et al (1992) [17]. For the reservoir with irregular geometry, numerical methods such as finite element method must be used, because an analytical solution cannot achieve results for the arbitrary boundary and geometry of the system.…”

Section: Introductionmentioning

confidence: 99%

Frequency Analysis of Concrete Gravity Dam with Finite Element Model and LHS Method

Khiavi

Feizi

Jalali

2019

NMCE

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In this paper, the dynamic response of a concrete gravity dam along with reservoir domain is investigated by frequency analysis and Latin hypercube sampling (LHS) statistical methods using finite element model. In this analysis, the frequency value is assigned to the model as an input variable. Then, the effects of frequency parameter are studied on maximum horizontal displacement of the dam crest, maximum tensile stress in the heel, maximum compressive stress in the toe and hydrodynamic pressure on the heel of the dam. The ANSYS software, according to finite element method (FEM), is applied for modeling and analysis. In order to represent the effect of the dynamic loading frequency, which is an important parameter in the analysis of the structures, the maximum response values are presented as sensitivity and probability curves. According to the sensitivity diagram of the hydrodynamic pressure response vs. the input frequency, it can be concluded that in the frequency of loading near the natural frequency of reservoir, the most critical condition occurs for seismic display, which should be highly considered in designing concrete dams.

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Time-domain analyses of three-dimensional dam-reservoir interactions by BEM and semi-analytical method

Cited by 14 publications

References 29 publications

Evaluation of the effect of reservoir length on seismic behavior of concrete gravity dams using Monte Carlo method

Evaluation of the effect of reservoir length on seismic behavior of concrete gravity dams using Monte Carlo method

Seismic performance evaluation of concrete gravity dams using an efficient finite element model

Frequency Analysis of Concrete Gravity Dam with Finite Element Model and LHS Method

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