Dynamic centrifuge tests of concrete dam

Uchita, Yasuo; Shimpo, Takashi; Saouma, Victor E.

doi:10.1002/eqe.493

Cited by 20 publications

(9 citation statements)

References 7 publications

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“…In the scaling process of the test specimen, the stress and strain values are scaled independently whereas the fracture energy of the concrete was scaled by the reciprocal of the scale, that is, 1/75 [17]. The strength increase of concrete as a result of rapid loading cannot be obtained during the PsD test due to the slow nature of this testing procedure.…”

Section: Psd For Testing Of a Dam Monolith And The Test Specimenmentioning

confidence: 99%

“…However, the concrete strength was adjusted such that the static tensile strength of the scaled model matches the dynamic tensile strength of the actual dam section under high loading rates. In the scaling process of the test specimen, the stress and strain values are scaled independently whereas the fracture energy of the concrete was scaled by the reciprocal of the scale, that is, 1/75 [17]. Therefore, the fracture process zone of the concrete should be reduced to decrease the fracture energy [17,27].…”

Section: Psd For Testing Of a Dam Monolith And The Test Specimenmentioning

confidence: 99%

“…In the scaling process of the test specimen, the stress and strain values are scaled independently whereas the fracture energy of the concrete was scaled by the reciprocal of the scale, that is, 1/75 [17]. Therefore, the fracture process zone of the concrete should be reduced to decrease the fracture energy [17,27]. To accomplish this, the aggregate sizing was also reduced by the scale factor during the concrete manufacturing process.…”

Section: Psd For Testing Of a Dam Monolith And The Test Specimenmentioning

confidence: 99%

“…In this regard, engineers usually resort to scaled testing by either changing the density of the dam material [15,16] or adjusting the gravitational acceleration using centrifuges in order to simulate the vertical stresses [17] properly according to the similitude laws. In this regard, engineers usually resort to scaled testing by either changing the density of the dam material [15,16] or adjusting the gravitational acceleration using centrifuges in order to simulate the vertical stresses [17] properly according to the similitude laws.…”

Section: Introductionmentioning

confidence: 99%

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Pseudo‐dynamic testing of a concrete gravity dam

Aldemir

Binici

Arıcı

et al. 2015

Earthq Engng Struct Dyn

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Summary Inspired from the simplified single degree of freedom modeling approach used in the preliminary design of concrete gravity dams, a pseudo‐dynamic testing method was devised for the seismic testing of a concrete gravity dam section. The test specimen was a 1/75 scaled section of the 120‐m‐high monolith of the Melen Dam, one of the highest concrete gravity dams to be built in Turkey. The single degree of freedom idealization of the dam section was validated in the first stage of the study using numerical simulations including the dam–reservoir interaction. Afterwards, pseudo‐dynamic testing was conducted on the specimen using three ground motions corresponding to different hazard levels. Lateral displacement and base shear demands were measured. The crack propagation at the base of the dam was monitored with the measurement of the crack widths and the base sliding displacements. After the pseudo‐dynamic loading, a static pushover test was conducted to determine the reserve capacity of the test specimen. Despite major cracking at the base of the monolith, neither significant sliding nor a stability problem that might jeopardize the stability of the dam was observed. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Psd For Testing Of a Dam Monolith And The Test Specimenmentioning

confidence: 99%

Section: Psd For Testing Of a Dam Monolith And The Test Specimenmentioning

confidence: 99%

“…In the scaling process of the test specimen, the stress and strain values are scaled independently whereas the fracture energy of the concrete was scaled by the reciprocal of the scale, that is, 1/75 [17]. Therefore, the fracture process zone of the concrete should be reduced to decrease the fracture energy [17,27]. To accomplish this, the aggregate sizing was also reduced by the scale factor during the concrete manufacturing process.…”

Section: Psd For Testing Of a Dam Monolith And The Test Specimenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pseudo‐dynamic testing of a concrete gravity dam

Aldemir

Binici

Arıcı

et al. 2015

Earthq Engng Struct Dyn

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“…Previous endeavors included shake table tests 8 as well as centrifuge tests 9 on small‐scale dam models. In shake table tests, reduced‐scale dam models are subjected to dynamic excitations based on similitude principles.…”

Section: Introductionmentioning

confidence: 99%

Quantifying modeling uncertainties in seismic analysis of dams: Insights from an international benchmark study

Hariri‐Ardebili

2023

Earthq Engng Struct Dyn

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Advances in nonlinear dynamic analysis of dams have not completely resolved concerns over modeling confidence and analysis accuracy. Verification and validation offer accuracy assessment, but uncertainties persist during performance evaluation due to both epistemic (modeling) and aleatory (parametric) sources. Epistemic uncertainties arise from simplifications and modeling techniques. This paper addresses epistemic uncertainties in a gravity dam seismic analysis using data from the International Comnission on Large Dams (ICOLD) benchmark study. While the benchmark formulation included the finite element model of the dam, mechanical material properties, and dynamic loads, participants retained the flexibility to opt for best‐practice modeling assumptions, simplifications, and other specifics. Notable response variability emerged, particularly in crack profiles and damage predictions. This study examines sources of variability, quantifying modeling uncertainty for the benchmark problem. More specifically, the modeling variability is quantified using the logarithmic standard deviation, also known as dispersion. This metric enables its incorporation into other seismic risk assessment and fragility studies. Under relatively low‐intensity motion (peak ground acceleration [PGA] of 0.18 g in this case), modeling dispersion of 0.45, 0.30, 0.32, and 0.30 were calculated for the maximum dynamic crest displacement, maximum hydrodynamic pressure at the heel, heel and crest maximum acceleration, respectively. Additionally, the dispersion of the failure PGA was determined to be 0.7. Findings underscore the need for systematic seismic response modeling in dam engineering to enhance prediction accuracy. A better understanding of the sources and magnitudes of modeling uncertainties can help improve the reliability of dam seismic analysis and contribute to the development of more effective risk assessment and mitigation strategies.

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Seismic deformation and seismic resistance analysis of Shapai Roller Compacted Concrete Arch Dam based on field monitoring and dynamic finite element method

He²,

Xie³

2013

J. Mt. Sci.

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Dynamic centrifuge tests of concrete dam

Cited by 20 publications

References 7 publications

Pseudo‐dynamic testing of a concrete gravity dam

Pseudo‐dynamic testing of a concrete gravity dam

Quantifying modeling uncertainties in seismic analysis of dams: Insights from an international benchmark study

Seismic deformation and seismic resistance analysis of Shapai Roller Compacted Concrete Arch Dam based on field monitoring and dynamic finite element method

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