Experimental investigation on nonlinear dynamic response of concrete gravity dam-reservoir system

Mridha, S.; Maity, Damodar

doi:10.1016/j.engstruct.2014.09.017

Cited by 64 publications

(23 citation statements)

References 25 publications

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“…The Koyna earthquake's two components are shown in Figure 5. Only the horizontal and vertical components of the earth's seismic movement are taken into account in the verification test, which is consistent with the seismic data reported in the model test [24].…”

Section: Validation Testsupporting

confidence: 71%

“…All movement restrictions are removed after a static analysis and the flow and vertical components of the Koyna earthquake accelerations are added as an input load to the base of the foundation. In Figure 7, Final Koyna dam crack profile obtained by numerical modeling with design test profile [24]. The damage area is shaded in green showing crack profiles.…”

Section: Validation Testmentioning

confidence: 99%

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Simulation of Cracking in High Concrete Gravity Dam Using the Extended Finite Elements by ABAQUS

Ghallab¹

2020

AJMA

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Section: Validation Testsupporting

confidence: 71%

Section: Validation Testmentioning

confidence: 99%

Simulation of Cracking in High Concrete Gravity Dam Using the Extended Finite Elements by ABAQUS

Ghallab¹

2020

AJMA

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“…The maximum principal stress failure criterion is selected for damage initiation. 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-supporting

confidence: 69%

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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“…The influence of the incidence angle of the seismic waves on various dam bodies should also be taken seriously. RCC (roller-compacted concrete) has been widely used in engineering due to its structural and construction advantages [15,16], and the joint construction of RCC with other materials has become the future development trend [17,18]. However, material properties and deformation characteristics of CC (conventional concrete) and RCC are significantly different from each other, and high deformation gradients tend to occur at the interface under seismic excitation.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Dynamic Response of a CC-RCC Combined Dam Structure under Oblique Incidence of Near-Fault Ground Motions

Zhang

et al. 2020

Applied Sciences

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The velocity pulse contained in near-fault ground motions have a tremendous impact on dam safety. Previous studies have mainly focused on the response of dams under near-fault seismic records without considering the obliquely incident seismic waves. In this study, the structure–soil interaction (SSI) is taken into consideration, and the nonlinear behavior of a conventional concrete roller-compacted concrete (CC-RCC) gravity dam under near-fault pulse records and non-pulse records is investigated with consideration of the obliquely incident P waves. On the basis of the dam site conditions, three groups of near-fault pulse records are chosen, and three corresponding non-pulse records are fitted by their acceleration response spectra. Combining with the viscous-spring artificial boundary, the wave input method is proposed to transform the near-fault seismic records into the equivalent nodal forces at the boundary of the foundation. The concrete damaged plasticity model is used for the nonlinear analysis. The results show that the pulse ground motions are more destructive than the non-pulse motions. The nonlinear behavior of the dam varies with the incidence angle of P waves and generally reaches a maximum at 60° and 75°, the worst damage occurs at the interface between different materials of the dam, and the spatial variation of its damage is very obvious under near-fault seismic records with various incidence angles. Therefore, the effect of the angle of obliquely incident seismic waves and near-fault pulse effect should be considered comprehensively in the seismic analysis of dams.

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Experimental investigation on nonlinear dynamic response of concrete gravity dam-reservoir system

Cited by 64 publications

References 25 publications

Simulation of Cracking in High Concrete Gravity Dam Using the Extended Finite Elements by ABAQUS

Simulation of Cracking in High Concrete Gravity Dam Using the Extended Finite Elements by ABAQUS

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

Nonlinear Dynamic Response of a CC-RCC Combined Dam Structure under Oblique Incidence of Near-Fault Ground Motions

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