Failure analysis of fractured dams during earthquakes by DEM

Pekau, O. A.; Cui, Yuzhu

doi:10.1016/j.engstruct.2004.05.019

Cited by 56 publications

(21 citation statements)

References 25 publications

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“…However, once sliding or rocking starts, the structure becomes a mechanism since the cracks may change their contact status or even separate the structure into independent free bodies. Compared with friction and impact damping, the viscous damping elsewhere is negligible [11] since the velocity is reasonably low even when under a very strong earthquake.…”

Section: Energy Dissipationmentioning

confidence: 97%

See 1 more Smart Citation

Seismic behavior of concrete gravity dams with penetrated cracks and equivalent impact damping

Zhu¹,

Pekau²

2007

Engineering Structures

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Section: Energy Dissipationmentioning

confidence: 97%

“…Tinawi et al [10] conducted a shake table test on the seismic behavior of cracked gravity dams. Pekau and Cui [11] studied the dynamic behavior of the fractured Koyna dam by DEM. All these studies involve only a single crack.…”

Section: Introductionmentioning

confidence: 99%

Seismic behavior of concrete gravity dams with penetrated cracks and equivalent impact damping

Zhu¹,

Pekau²

2007

Engineering Structures

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“…Due to this kind of structure widely used in a variety of water conservancy fields and great promise for future application, the safety of the structure has received widespread attention and has been investigated extensively by many researchers. For example, Pekan et al [1] performed a comprehensive study on the dynamic behavior of the fractured dam during earthquakes using the distinct element method. Their results showed that the safety of the dam is ensured if the crack shape is horizontal or upstream-sloped; it is very dangerous if the crack slopes downstream.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of gravity dam model with crack and damage detection

Wang

Ren

2011

Sci. China Technol. Sci.

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Gravity dam is a typical structure that has been frequently used in the fields of water conservancy engineering, and the safety of the structure has received widespread attention recently. Due to earthquakes or other reasons, gravity dams normally have damage such as cracks in practical service. Damage in the structures can alter the structural dynamic behavior and seriously affect structural performance. Maintaining safety and integrity of the gravity dam structures requires a better understanding of dynamic response of structure with damage and associated damage detection method. In order to study thoroughly the dynamic behavior of gravity dam with damage, the sweep vibration responses of the gravity dam with and without damage are investigated. The experimental results show that the peak-peak acceleration responses all increase for the structure is with crack. At the same time, a structural damage detection method, i.e., the local damage factor (LDF) method, is considered in the study of gravity dam damage detection when the dam is subjected to the base excitation. It is shown that the LDF method can be used as a damage index and is capable of evaluating both the presence and relative severity of structural damage, and it can be used as a viable condition assessment and damage identification technique to detect and quantify the damage in the gravity dam. gravity dam, dynamic response, crack, sweep, damage detection, local damage factor Citation:Wang S S, Ren Q W. Dynamic response of gravity dam model with crack and damage detection.

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“…Numerical simulations for engineering practice have been applied by an increasing number of researchers, especially with advances in computer technology. Pekau and Cui (2004) presented a comprehensive study of the dynamic behavior of the fractured Koyna dam in India during earthquakes using the distinct element method (DEM). Zhang et al (2004) simulated a high concrete-faced rock fill dam of Tianshengqiao-1 in China to reveal whether the deformation of the dam body is non-linear or time dependent.…”

Section: Introductionmentioning

confidence: 99%

Seismic liquefaction analysis of a reservoir dam foundation in the South–North Water Diversion Project in China. Part II: seismic response simulation

Zheng

Zhuang

2011

Nat Hazards

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As shown in Part I of this study, the saturated surface silt of the dam foundations in Tianjin is vulnerable to liquefaction with a seismic intensity of VII. According to the Chinese codes for the seismic design of buildings (Hydropower Research Institute of China), specifications for seismic design of hydraulic structures (DL 5073procedures were selected for anti-liquefaction treatments in this project. Numerical simulation analyses, which have become an indispensable step in engineering practice, especially for large projects such as this, have been applied to dam foundations before and after anti-liquefaction treatments to see how they will behave in an earthquake. Simulated results of the dam foundations during an earthquake were obtained for excess pore water pressure, acceleration, displacement, and properties that are considered useful for earthquake geotechnical design. The simulation is in good agreement with empirical methods for the performance of the dam foundation during the earthquake. Results also show that the anti-liquefaction treatments that made use of a cutoff wall and a platform beyond the dam improved the integral stability of the dam. The cutoff wall can prevent lateral spreading (of the left side foundation soil in the case presented here), and the platform prevents an increase in pore water pressure.

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Failure analysis of fractured dams during earthquakes by DEM

Cited by 56 publications

References 25 publications

Seismic behavior of concrete gravity dams with penetrated cracks and equivalent impact damping

Seismic behavior of concrete gravity dams with penetrated cracks and equivalent impact damping

Dynamic response of gravity dam model with crack and damage detection

Seismic liquefaction analysis of a reservoir dam foundation in the South–North Water Diversion Project in China. Part II: seismic response simulation

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