We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Modeling Variability in Seismic Analysis of Concrete Gravity Dams: A Parametric Analysis of Koyna and Pine Flat Dams.
- Authors
Patra, Bikram Kesharee; Segura, Rocio L.; Bagchi, Ashutosh
- Abstract
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.
- Subjects
CONCRETE dams; GRAVITY dams; ARCH dams; CONCRETE analysis; DAM safety; DAMS; SEISMIC response
- Publication
Infrastructures, 2024, Vol 9, Issue 1, p10
- ISSN
2412-3811
- Publication type
Article
- DOI
10.3390/infrastructures9010010