Seismic cracking of concrete gravity dams by plastic–damage model using different damping mechanisms

Omidi, Omid; Valliappan, S.; Lotfi, Vahid

doi:10.1016/j.finel.2012.08.008

Cited by 78 publications

(27 citation statements)

References 37 publications

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“…Figure 9 shows the final crack profile of Koyna dam under the 1967 Koyna earthquake obtained from the numerical simulation and the model test [Mridha and Maity, 2014], it can be noted that the occurring crack profile match reasonably well with the experimental results from the model test. By comparing the current results with the Koyna dam prototype observation [Chopra and Chakrabarti, 1973], the model test [Mridha and Maity, 2014], and previous research results [Calayir and Karaton, 2005;Pan et al, 2011;Das and Cleary, 2013;Omidi et al, 2013], it may be concluded that the XFEM procedure can predict effectively the crack propagation process in concrete gravity dams under seismic conditions.…”

Section: Seismic Crack Propagation Analysis Of Koyna Gravity Dam-dam-mentioning

confidence: 60%

“…To predict the possible crack profiles and the corresponding seismic capacity of concrete gravity dams with initial cracks is of outmost necessity to ensure safe operations of the structures. Significant research efforts on studying the cracking behavior of concrete gravity dams have been made over the last decade [Ayari and Saouma, 1990;Bhattacharjee and Léger, 1994;Lee and Fenves, 1998;Calayir and Karaton, 2005;Zhong et al, 2011;Pan et al, 2011;Omidi et al, 2013;Zhang et al, 2013a]. However, few attempts have been done to analyze the crack propagation process of concrete gravity dams with initial cracks in their base or at the upstream and downstream faces.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Initial Cracks on the Crack Propagation Process of Concrete Gravity Dam-Reservoir-Foundation Systems

Wang

Zhou

et al. 2015

Journal of Earthquake Engineering

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A scaled-down 1:40 model of a gravity dam with the initial notch in the upstream wall is analyzed using the XFEM. Furthermore, the cracking process of Koyna dam including dam-reservoir-foundation interaction under the 1967 Koyna earthquake is also simulated numerically by employing the XFEM. The computed distribution of cracking damage is consistent with other numerical methods and the model experiment. Subsequently, a typical concrete gravity dam with different crack cases is employed as a numerical example. The effects of the initial crack position and length on the crack propagation and seismic response of dam-reservoir-foundation systems are studied.

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Section: Seismic Crack Propagation Analysis Of Koyna Gravity Dam-dam-mentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

The Influence of Initial Cracks on the Crack Propagation Process of Concrete Gravity Dam-Reservoir-Foundation Systems

Wang

Zhou

et al. 2015

Journal of Earthquake Engineering

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“…This model has been successfully used for modeling the contraction joints in arch dams [6]. The former one itself can be divided into two major groups, i.e., the damage mechanics approach [29][30][31] and the smeared crack approach [32][33][34].…”

Section: Smeared Crack Modelmentioning

confidence: 99%

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Hariri-Ardebili

Kolbadi²,

Noori

2018

Shock and Vibration

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Recently, probabilistic simulations became an inseparable part of risk analysis. Managers and stakeholders prefer to make their decision knowing the existing uncertainties in the system. Nonlinear dynamic analysis and design of infrastructures are affected by two main uncertainty sources, i.e., epistemic and aleatory. In the present paper, the epistemic uncertainty is addressed in the context of material randomness. An old ultra-high arch dam is selected as a vehicle for numerical analyses. Four material properties are selected as random variables in the coupled dam-reservoir-foundation system, i.e., concrete elasticity, mass density, compressive (and tensile) strength, and the rock modulus of elasticity. The efficient Box-Behnken experimental design is adopted to minimize the required simulations. A response surface metamodel is developed for the system based on different outputs, i.e., displacement and damage index. The polynomial-based response surface model is subsequently validated with a large number of simulations based on Latin Hypercube sampling. Results confirm the high accuracy of proposed technique in material uncertainty quantification.

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“…The protection against damage or failure of this structures are the key task for civil engineering. There are many dynamic studies about influence of seismic and mining excitation to engineering structures in literature [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear performance of a concrete gravity dam under a moderate seismic shock

Torba¹,

Dulińska²,

Boroń³

2017

Vib. proced.

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Abstract. In the paper, the dynamic analysis of a concrete gravity dam was presented. The paper concerns the nonlinear dynamic analysis of an existing concrete dam subjected to a real moderate seismic shock calculated by time history analysis. The linear, elastic, response spectrum analysis was also performed. The dynamic analysis was carried out for 2D and 3D numerical models of the dam. The 2D model represented the middle section of dam's segment, whereas the 3D model reflected the whole segment. The concrete damage plasticity model (CDP) as a constitutive model of concrete was taking into account. Principal stresses, plastic deformations and degradation of the dam under the shock were evaluated. The results obtained for both models (2D and 3D) were compared. The 3D analysis led to the results revealing material degradation (tensile/compression cracks, stiffness degradation). Such behavior was not obtained for the 2D model.

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Seismic cracking of concrete gravity dams by plastic–damage model using different damping mechanisms

Cited by 78 publications

References 37 publications

The Influence of Initial Cracks on the Crack Propagation Process of Concrete Gravity Dam-Reservoir-Foundation Systems

The Influence of Initial Cracks on the Crack Propagation Process of Concrete Gravity Dam-Reservoir-Foundation Systems

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Nonlinear performance of a concrete gravity dam under a moderate seismic shock

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