Simplified evaluation of the vibration period and seismic response of gravity dam–water systems

Miquel, Benjamin; Bouaanani, Najib

doi:10.1016/j.engstruct.2010.04.025

Cited by 22 publications

(10 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many prediction equations for estimating the fundamental vibration period of gravity dams (Aldemir, 2018; Chopra, 1978; Fenves and Chopra, 1986; Hatanaka, 1960; Miquel and Bouaanani, 2010; Okamoto, 1984; Varughese and Nikithan, 2016). These efforts usually used a standard dam body geometry (i.e.…”

Section: Definition Of the Problemmentioning

confidence: 99%

Prediction equation for the fundamental vibration period of concrete gravity dams with impounded water

Aldemir

2021

Earthquake Spectra

View full text Add to dashboard Cite

The design of dam structures requires advanced analysis techniques due to the dam body’s complicated interaction with its surroundings. Consequently, most of the time, it is a must to perform response history analysis during the design and assessment of dam structures. The target fundamental vibration period is necessary to generate ground motion histories compatible with the site-specific response spectrum. In this study, an equation was developed to predict the fundamental vibration period of concrete gravity dams based on an extensive database. First, a wide range of parameters to describe gravity dams’ three-dimensional (3D) geometry and their valleys are determined. A total of 19,440 different 3D numerical models with fluid and solid elements were formed, and the fundamental vibration period values were determined to create the necessary database. Then, multiple nonlinear regression analysis was conducted to propose an equation to predict the fundamental vibration period. The proposed equation could be used to accurately estimate the required fundamental vibration period during the preliminary design stage or the implementation of simplified procedures or during the spectrum matching operations.

show abstract

Section: Definition Of the Problemmentioning

confidence: 99%

Prediction equation for the fundamental vibration period of concrete gravity dams with impounded water

Aldemir

2021

Earthquake Spectra

View full text Add to dashboard Cite

show abstract

“…Due to the devastating earthquake experience, this dam has been more studied. Moreover, the properties of the allocated material for the concrete dam, the foundation, and the reservoir based on experience and background of studies are listed in Table 1 [21][22][23][24][25][26][27][28].…”

Section: Case Studymentioning

confidence: 99%

Parametric Study of the Modal Behavior of Concrete Gravity Dam by Using Finite Element Method

Jafari

Khiavi

2019

Civ Eng J

View full text Add to dashboard Cite

Calculating the natural frequency of dams is an essential part of its seismic behavior analysis. Therefore, it is important to calculate the natural frequency. This paper aims simulation and analysis the finite element (FE) model of the Koyna concrete gravity as a case study. For the investigation of the suitable mesh size to achievement the grid independence, the element size considered as a variable parameter and calculated its optimized value by using the Response Surface Optimization (RSO) method. In the independent grid, the Error Contour utilized for controlling mesh quality, which indicates fast variations of the energy in the adjacent elements and can recognize parts of the model that has a high error in calculating responses. The modal response of the dam with a rigid and flexible foundation with and without mass were appraised. The results indicated that modal frequencies in the condition of with and without Pre-stress were different value in all cases. Moreover, the frequency of first four modes by increasing mass and decreasing the stiffness of foundation, frequencies in the case without initial condition (without Pre-stress) has a slightly increased and in the case with initial condition (Pre-stress) had considerable decrease.

show abstract

“…Lee and Tsai [15] also developed a closed form solution for fluid domain. Miquel and Bouaanani [16] first presented a simplified evaluation for seismic response of the dam-reservoir systems, and then they used this simplified approach to determine the modal dynamic response of flexible beam-fluid systems [17]. ese analytical solutions are really efficient in time but they have geometrical and boundary condition limitation and also they cannot be used in nonlinear problems.…”

Section: Introductionmentioning

confidence: 99%

Numerical Uncoupling of Domains in Dam‐Reservoir Problem

Golchin

Attarnejad

Vahdani

2018

Shock and Vibration

View full text Add to dashboard Cite

Flexibility of dam structure affects the hydrodynamic pressure acting on the dam. Several approaches have been proposed to consider this effect. Most of these approaches are involved with an iterative scheme. Of course solving the total numerical model including the dam and the reservoir is the most accurate method, but it has certain deficiencies. Using the frontal solution method of total model, dam structure, and fluid domain and keeping the interface degrees of freedom in the front is proposed in the current study. Having the solution of the interface degrees of freedom, the structure and fluid may be analyzed separately. The main advantage of the method lies in the fact that the accuracy of the results is the same as analysis of the total model, no iteration is necessary, combination of Lagrangian and Eulerian formulations for solid and fluid may be used, and the unknown variables are of the same order. Performing the analysis in time domain extends the method to nonlinear analysis if required.

show abstract

Simplified evaluation of the vibration period and seismic response of gravity dam–water systems

Cited by 22 publications

References 15 publications

Prediction equation for the fundamental vibration period of concrete gravity dams with impounded water

Prediction equation for the fundamental vibration period of concrete gravity dams with impounded water

Parametric Study of the Modal Behavior of Concrete Gravity Dam by Using Finite Element Method

Numerical Uncoupling of Domains in Dam‐Reservoir Problem

Contact Info

Product

Resources

About