FEM-based parametric analysis of a typical gravity dam considering input excitation mechanism

Hariri-Ardebili, Mohammad Amin; Kolbadi, S. Mahdi S.; Kianoush, M.R.

doi:10.1016/j.soildyn.2016.01.013

Cited by 55 publications

(17 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three of them belong to concrete, i.e., elasticity, mass density, and compressive strength, and the remaining one belongs to the foundation, i.e., modulus of elasticity. These parameters are among those most sensitive RVs identified for concrete dams in [37]. Furthermore, it is noteworthy to say that a full correlation is assumed among the concrete tensile and compressive strength through a deterministic relationship = 0.1 .…”

Section: Numerical Examplementioning

confidence: 99%

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Hariri-Ardebili

Kolbadi²,

Noori

2018

Shock and Vibration

View full text Add to dashboard Cite

Recently, probabilistic simulations became an inseparable part of risk analysis. Managers and stakeholders prefer to make their decision knowing the existing uncertainties in the system. Nonlinear dynamic analysis and design of infrastructures are affected by two main uncertainty sources, i.e., epistemic and aleatory. In the present paper, the epistemic uncertainty is addressed in the context of material randomness. An old ultra-high arch dam is selected as a vehicle for numerical analyses. Four material properties are selected as random variables in the coupled dam-reservoir-foundation system, i.e., concrete elasticity, mass density, compressive (and tensile) strength, and the rock modulus of elasticity. The efficient Box-Behnken experimental design is adopted to minimize the required simulations. A response surface metamodel is developed for the system based on different outputs, i.e., displacement and damage index. The polynomial-based response surface model is subsequently validated with a large number of simulations based on Latin Hypercube sampling. Results confirm the high accuracy of proposed technique in material uncertainty quantification.

show abstract

Section: Numerical Examplementioning

confidence: 99%

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Hariri-Ardebili

Kolbadi²,

Noori

2018

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…In the case of the foundation model, an appropriate boundary condition for the far end nodes is required to prevent reflection of the outgoing waves back into the system. And the consistent equivalent viscoelastic boundary is adopted in this paper to simulate the ground radiation damping [28][29][30].…”

Section: Engineering Situation and Calculationmentioning

confidence: 99%

Dynamic Stability Discrimination Method for Concrete Dam under Complex Geological Conditions

Zhang

et al. 2019

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The instability of dams will bring immeasurable personal and property losses to the downstream, so it has always been a trendy topic worthy of investigation. Currently, the rigid body limit equilibrium method is the most commonly used method for the dynamic stability analysis of dams. However, under the action of earthquakes, the instability of the integral dam-foundation system threatens the safety of the dams and is of great concern. In this paper, a stability analysis method that can reflect the complex geological structural forms of dam foundations is proposed in this paper. The advantages are that this method deals with the difficulty in assuming sliding surfaces and the lack of quantitative criteria for the dynamic instability analysis of dams with complex geological structural forms of dam foundations. In addition, through the method, the sliding channels that may appear in the dam foundations can be automatically searched under random earthquake action, and the safety factors of the dynamic instability of dams be quantitatively obtained. Taking a high RCC gravity dam under construction in China as an example, the proposed method is applied to the three-dimensional finite element model of the dam-foundation system of this dam, and then the dynamic stability calculation is carried out. Through this method, the formation process of the dam foundation’s plastic zone and the failure of sliding channels with different strength reduction coefficients are studied on and analyzed detailedly, and the quantitative acquisition of the safety factors is realized. The results show that the method is reasonable and feasible, and helps provide a new idea and method for the dynamic stability analysis of dams.

show abstract

“…ese include the viscous boundary [8], viscous-spring boundary [9][10][11][12], multitransmitting boundary [13,14], the scaled boundary finite element method [15][16][17][18][19], infinite elements [20][21][22][23], the perfectly matched layers (PMLs) [24][25][26], and high-order absorbing boundary conditions. e viscous boundary was proposed by Lysmer and Kuhlemeyer [8].…”

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

View full text Add to dashboard Cite

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.

show abstract

FEM-based parametric analysis of a typical gravity dam considering input excitation mechanism

Cited by 55 publications

References 56 publications

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Response Surface Method for Material Uncertainty Quantification of Infrastructures

Dynamic Stability Discrimination Method for Concrete Dam under Complex Geological Conditions

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

Contact Info

Product

Resources

About