Seismic performance and failure modes of the Jin'anqiao concrete gravity dam based on incremental dynamic analysis

Chen, Denghong; Yang, Zhengjian; Wang, Min; Xie, Jinghui

doi:10.1016/j.engfailanal.2019.02.018

Cited by 43 publications

(11 citation statements)

References 43 publications

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“…e ABAQUS/Standard-based wave input subroutine, SDAB for [41,44], for the viscous-spring boundary is created using FORTRAN. e wave field at the truncated boundary is separated into a free field without local topography effects and a scattering field induced by local topography effects.…”

Section: Seismic Input Using the Viscous-spring Boundarymentioning

confidence: 99%

“…Mandal and Maity [43] adopted a cone-type local nonreflecting boundary condition (spring-dashpot artificial boundary) to model the semiinfinite soil domain and conducted the seismic analysis of the dam-foundation coupled system considering a direct coupling approach. Chen et al [44] established a comprehensive and integral analysis model of the dam-foundation-reservoir water interaction system based on the viscous-spring boundary and its corresponding free field input mechanism. Guo et al [45] established a dynamic analysis model of a dam-foundationreservoir system in consideration of the interactions between the gravity dam and foundation and the radiation damping effect of the far-field boundary based on the contact model together with the viscous-spring boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influences on the Seismic Response of the Gravity Dam-Foundation-Reservoir System with Different Boundary and Input Models

Chen

Hou

Wang

2021

Shock and Vibration

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Dynamic dam-foundation interaction is great important in the design and safety assessment of the dam structures. Two classic boundary conditions, i.e., the viscous-spring boundary and the viscous boundary, are employed to consider the radiation damping of the unbounded rock foundation. The input models of seismic excitation of the viscous-spring boundary and the viscous boundary are derived. The accuracy of the two boundary conditions in the dynamic analysis of the dam foundation is verified through the foundation analysis using an impulsive load. The influences of two boundary conditions and their earthquake input models on the seismic analysis of the Pine Flat and Jin’anqiao gravity dam-foundation-reservoir systems are then investigated. The results of displacements, hydrodynamic pressure, and principal stresses show that the agreement between the results of the viscous-spring boundary and viscous boundary is good. The relative errors of the two models in the Pine Flat and Jin’anqiao gravity dams are both less than 5%. They are both acceptable from an engineering point of view.

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Section: Seismic Input Using the Viscous-spring Boundarymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influences on the Seismic Response of the Gravity Dam-Foundation-Reservoir System with Different Boundary and Input Models

Chen

Hou

Wang

2021

Shock and Vibration

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“…The current practice of modeling concrete gravity dams follows a two-dimensional approach under the plane strain assumption. This model (the plane strain) condition for the foundation and dam has been used by [20][21][22][23] to study the gravity dam's earthquake response.…”

Section: Two-dimensional Idealizationmentioning

confidence: 99%

Improving Resistance of Gravity Dam to Seismic Wave by Using Stepped Base

2021

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This study analyzes the possible modes of the seismic wave for concrete gravity dams and the damage occurring in the body where two gravity dam sections are taken as a case study. Model (1) is a typical section of a gravity dam, while model (2) is a gravity dam section provided with specified steps at its base. The design of seismic waves included Operational Base Earthquake (OBE), Maximum Design Earthquake (MDE), and Maximum Credible Earthquake (MCE) levels. The dam body-foundation-reservoir water interaction system is analyzed by numerical analysis software (ABAQUS). The main conclusion shows that the gravity dam model's underground motion loadings have a noticeable increase in the displacement distribution within the first gravity dam body model, especially in the higher mode compared to the first model. The first model's Damage Index value was equal to 0.357 at the MCE wave, which does not appear in the second model. The time taken for the damage that occurs within a model (1) is faster than the model (2). Consequently, model (2) significantly reduces seismic waves with different intensity levels on the amount of damage transmission within the gravity dam body.

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“…Considering the RTR variability in the IDA capacity functions, they should be summarized using some central values like the mean, median, and 16% and 84% fractiles. [47], (c) gravity dam [48], (d) gravity dam [49], (e) gravity dam [43], (f) arch dam [50], (g) gravity dam [51], and (h) gravity dam [52]. PGA, peak ground acceleration.…”

Section: Incremental Dynamic Analysismentioning

confidence: 99%

On the Dynamic Capacity of Concrete Dams

et al. 2019

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The purpose of this joint contribution is to study the maximum dynamic load concrete dams can withstand. The so-called "dynamic capacity functions" for these infrastructures seems now technically and commercially feasible thanks to the modern finite element techniques, hardware capabilities, and positive experiences collected so far. The key topics faced during the dynamic assessment of dams are also discussed using different point of view and examples, which include: the selection of dynamic parameters, the progressive level of detail for the numerical simulations, the implementation of nonlinear behaviors, and the concept of the service and collapse limit states. The approaches adopted by local institutions and engineers on the subject of dam capacity functions are discussed using the authors' experiences, and an overview of time and resources is outlined to help decision makers. Three different concrete dam types (i.e., gravity, buttress, and arch) are used as case studies with different complexities. Finally, the paper is wrapped up with a list of suggestions for analysts, the procedure limitations, and future research needs.

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Seismic performance and failure modes of the Jin'anqiao concrete gravity dam based on incremental dynamic analysis

Cited by 43 publications

References 43 publications

Influences on the Seismic Response of the Gravity Dam-Foundation-Reservoir System with Different Boundary and Input Models

Influences on the Seismic Response of the Gravity Dam-Foundation-Reservoir System with Different Boundary and Input Models

Improving Resistance of Gravity Dam to Seismic Wave by Using Stepped Base

On the Dynamic Capacity of Concrete Dams

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