Influence of reservoir geometry and conditions on the seismic response of arch dams

García, F. Francisco Pérez; Aznárez, Juan J.; Cifuentes, Héctor; Medina, Fernando R. Contreras; Maeso, Orlando

doi:10.1016/j.soildyn.2014.10.008

Cited by 6 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two-dimensional (2D) analyses of the dam geometries are still the most common approach for the design or evaluation of gravity dams. Most three-dimensional analysis methods in the past were developed in reference to arch dams [29]. In this type of analysis, a single (horizontal) or two-component (horizontal and vertical) approach is used for seismic loading.…”

Section: Horizontal Vs Combined Horizontal and Vertical Earthquake Co...mentioning

confidence: 99%

Modeling Variability in Seismic Analysis of Concrete Gravity Dams: A Parametric Analysis of Koyna and Pine Flat Dams

Patra,

Segura,

Bagchi

2024

Infrastructures

View full text Add to dashboard Cite

This study addresses the vital issue of the variability associated with modeling decisions in dam seismic analysis. Traditionally, structural modeling and simulations employ a progressive approach, where more complex models are gradually incorporated. For example, if previous levels indicate insufficient seismic safety margins, a more advanced analysis is then undertaken. Recognizing the constraints and evaluating the influence of various methods is essential for improving the comprehension and effectiveness of dam safety assessments. To this end, an extensive parametric study is carried out to evaluate the seismic response variability of the Koyna and Pine Flat dams using various solution approaches and model complexities. Numerical simulations are conducted in a 2D framework across three software programs, encompassing different dam system configurations. Additional complexity is introduced by simulating reservoir dynamics with Westergaard-added mass or acoustic elements. Linear and nonlinear analyses are performed, incorporating pertinent material properties, employing the concrete damage plasticity model in the latter. Modal parameters and crest displacement time histories are used to highlight variability among the selected solution procedures and model complexities. Finally, recommendations are made regarding the adequacy and robustness of each method, specifying the scenarios in which they are most effectively applied.

show abstract

Section: Horizontal Vs Combined Horizontal and Vertical Earthquake Co...mentioning

confidence: 99%

Modeling Variability in Seismic Analysis of Concrete Gravity Dams: A Parametric Analysis of Koyna and Pine Flat Dams

Patra,

Segura,

Bagchi

2024

Infrastructures

View full text Add to dashboard Cite

show abstract

“…The results showed that the reservoir geometry obviously affected the accuracy of numerical computation of fluid–structure interaction. For 3D arch dams, Garcia et al. (2014) took the different far-field geometries and the levels of the reservoir into consideration based on the boundary finite element.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic pressures on arch dam faces with irregular reservoir geometry

Wang

Guo

2018

Journal of Vibration and Control

View full text Add to dashboard Cite

A scaled boundary finite element method is developed for the analysis of hydrodynamic pressures acting on arch dam faces with a reservoir of irregular geometry. Water compressibility and reservoir boundary absorption are considered simultaneously. The reservoir is idealized as composed of finite and infinite subdomains. Governing equations for evaluating hydrodynamic pressures of finite fluid domain have been established and the solution procedures are presented. In addition, the boundary conditions at the interface between finite and infinite subdomains are decided. Numerical examples validate the present method with high accuracy and show that the fairly irregular geometry of a reservoir has an important influence on the hydrodynamic pressures acting on the arch dam face. Frequency response functions of the hydrodynamic pressures in the stream and cross-stream directions are evidently influenced by reservoir geometry, while hydrodynamic pressures in the vertical direction are relatively less influenced. Another feature of the frequency response function of hydrodynamic pressures is that the amplitude of resonant peaks is affected much more by reservoir geometry as compared to the resonant frequency. Besides, peak value of hydrodynamic pressures in the arch direction and cantilever direction is also significantly influenced by reservoir geometry. Based on these facts, it can be concluded that the effect of reservoir geometry on hydrodynamic pressure should be considered for seismic design of arch dams.

show abstract