Earthquake Damage Analysis of Concrete Gravity Dams: Modeling and Behavior under Near-Fault Seismic Excitations

2015 ◽  
Vol 19 (7) ◽  
pp. 1037-1085 ◽  
Author(s):  
Junjie Huang
Keyword(s):  
Earthquake Damage ◽  
Damage Analysis ◽  
Gravity Dams ◽  
Seismic Excitations ◽  
Near Fault ◽  
Concrete Gravity Dams ◽  
And Behavior

scholarly journals Determination of limit-states for near-fault seismic fragility assessment of concrete gravity dams

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0 ◽  
Author(s):  
Mohammad Ali Sotoudeh ◽  
Mohsen Ghaemian ◽  
Abdolreza Sarvghad Moghadam
Keyword(s):  
Seismic Fragility ◽  
Gravity Dams ◽  
Limit States ◽  
Near Fault ◽  
Concrete Gravity Dams

scholarly journals Evolution law of overall damage of concrete gravity dam under near-fault ground motion

2021 ◽  
Author(s):  
Yafei Zhai ◽  
Liaojun Zhang ◽  
Hanyun Zhang ◽  
Tianxiao Ma ◽  
Binghui Cui
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Gravity Dam ◽  
Gravity Dams ◽  
Near Fault ◽  
Concrete Gravity Dams ◽  
Fling Step ◽  
Ground Motion Records ◽  
Near Fault Ground Motion ◽  
Dynamic Damage

Abstract Strong earthquake cases of concrete gravity dams show that the foundation damage has an important influence on the seismic response and damage characteristics of the dam body. Compared with non-pulse ground motions, pulse-like near-fault ground motions have a wider response spectrum sensitive zone, which will cause more modes of the structure to respond, resulting in more serious damage to the structure. In order to study the real dynamic damage characteristics of concrete gravity dams under the action of near-fault ground motions, this paper takes Koyna gravity dam as the object and establishes a multi-coupling simulation model that can reasonably reflect the dynamic damage evolution process of dam concrete and foundation rock mass. A total of 12 near-fault ground motion records with three types of rupture directivity pulse, fling-step pulse and non-pulse are selected, deep research on the overall damage evolution law of concrete gravity dams. Considering the additional influence of different earthquake mechanisms, different site types and other factors on the study, the selected ground motion records are from the same seismic events (Chi-Chi), the same direction but different stations. The results show that the foundation of the concretes gravity dam often get damaged before the dam body under the action of strong earthquakes. Compared with the near-fault non-pulse ground motion, the structural damage of the gravity dam under the action of the near-fault directivity pulse ground motion is significantly increased, and causes greater damage and displacement response to the dam body. The near-fault fling-step pulse ground motion has the least impact on the dynamic response of the gravity dam structure.

Seismic Risk Analysis of Concrete Gravity Dams under Near-Fault Ground Motions

2012 ◽  
Vol 256-259 ◽  
pp. 2240-2243
Author(s):  
Abdelhamid Hebbouche ◽  
Mahmoud Bensaibi ◽  
Hussein Mroueh
Keyword(s):  
Seismic Vulnerability ◽  
Human Life ◽  
Ground Motions ◽  
Probabilistic Method ◽  
Gravity Dams ◽  
Seismic Risk Analysis ◽  
Near Fault ◽  
Concrete Gravity Dams ◽  
Financial Losses

There are a large number of concrete dams worldwide. Some of the dams are in areas prone to seismicity and were built many years ago with minimal consideration to seismic loads. Dam safety during and after an earthquake, is the aim of the present study. The failure of a dam during an earthquake will be catastrophic in terms of human life and financial losses. In the present work, an analytical fragility analysis was performed in order to characterize the seismic vulnerability of concrete gravity dams by using a probabilistic method to model sources of uncertainty that could impact dam performance. The assessment of the seismic vulnerability of concrete gravity dams under near-fault ground motions was performed to assess their performance against seismic hazards. A case study was considered, it is about the dam of Oued el Fodda on the Oued Chelif River, West Algeria. This dam was designed in the early 1930s.

Application of Digital Simulation Software ANSYS in Rolling Concrete Dams Construction Technology

2011 ◽  
Vol 704-705 ◽  
pp. 352-357
Author(s):  
Gui Xiang Zeng
Keyword(s):  
Digital Simulation ◽  
Simulation Software ◽  
Construction Technology ◽  
Dynamic Features ◽  
Concrete Gravity Dam ◽  
Gravity Dams ◽  
Concrete Dam ◽  
Concrete Gravity Dams ◽  
Xinjiang Autonomous Region ◽  
Important Significance

Taking a large hydropower station in Xinjiang Autonomous Region as an example, and based on the limited unit method, the structure and seism forces features and response rules of rolling concrete gravity dam under different construction conditions were studied. The purpose for the paper is to understand dam working status under the different design conditions, and to evaluate anti-earthquake safety capability. It is proved that the present findings should play an important significance in the development of rolling concrete dam construction technology. Key words: Rolling Concrete Gravity Dams, Limited Unit Methods, Static Force Analysis, Dynamic Features.

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