Finite element model updating effects on nonlinear seismic response of arch dam–reservoir–foundation systems

Bayraktar, Alemdar; Sevim, Barış; Altunışık, Ahmet Can

doi:10.1016/j.finel.2010.09.005

Cited by 56 publications

(22 citation statements)

References 27 publications

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“…However, a FE model is usually obtained based on simplified assumptions that it may not truly represent all the physical aspects of an actual structure. Hence, the constructed FE model may result in significant differences in some dynamic response predictions (Bayraktar, Sevim, Altunisik, & Turker, 2010;Bayraktar, Altunisik, Sevim, & Turker, 2011), and these differences can be largely manifested in a nonlinear dynamic analysis (Bayraktar, Sevim, & Can Altunisik, 2011). As commonly known, these discrepancies originate from the uncertainties in the assumptions of structural material properties, geometries, boundary conditions and contributions from non-structural elements in the real structures.…”

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confidence: 99%

Effects of model updating on the estimation of stochastic seismic response of a concrete-filled steel tubular arch bridge

Zhang

Yan

et al. 2013

Structure and Infrastructure Engineering

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2014) Effects of model updating on the estimation of stochastic seismic response of a concrete-filled steel tubular arch bridge, Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance, 10:12,The objectives of this paper are to integrate the structural health monitoring (SHM) technique with the structural seismic analysis, and to make the SHM technique serve, benefit and promote the structural seismic analysis integrally. Therefore, considering a concrete-filled steel tubular arch bridge structure, the SHM technique is used to calibrate the finite element (FE) model through the model-updating scheme to minimise the structural response differences caused by FE model errors. Effects of model updating on structural seismic responses are investigated using the stochastic vibration analysis approach. It is observed that effects of model updating are significant on structural seismic responses, and these effects may become more evident in structural nonlinear dynamic analysis. Hence, it is of prime importance to calibrate the FE models through the SHM technique for seismic evaluations of some operational critical structures.

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confidence: 99%

Effects of model updating on the estimation of stochastic seismic response of a concrete-filled steel tubular arch bridge

Zhang

Yan

et al. 2013

Structure and Infrastructure Engineering

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“…In order to prevent concrete dams from causing secondary disasters during or after earthquakes, it is necessary to execute seismic safety check at regular intervals, and the usual approach is to evaluate the aseismic strength of dam body through the comparison between earthquake failure threshold and structural dynamic analysis result . Whether results of structural dynamic analysis are accurate depends on many factors, among which whether preset dynamic parameters of dam materials are consistent with the objective reality is dominant . Dynamic parameters of a concrete dam include elastic modulus, dynamic Poisson's ratio, and damping, which are usually obtained from dynamic tests of the concrete on site .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Whether results of structural dynamic analysis are accurate depends on many factors, among which whether preset dynamic parameters of dam materials are consistent with the objective reality is dominant. 4,5 Dynamic parameters of a concrete dam include elastic modulus, dynamic Poisson's ratio, and damping, which are usually obtained from dynamic tests of the concrete on site. 6 However, due to complexities of geometry, material composition and boundary condition, real dynamic parameter values are not exactly the same as test results.…”

Section: Introductionmentioning

confidence: 99%

Joint back‐analysis for dynamic material parameters of concrete dam based on time‐frequency domain information

Fang

Wen

2019

Struct Control Health Monit

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Summary It is significant to obtain dynamic material parameters for checking seismic safety of the concrete dam. At present, it is common to optimize dynamic material parameters based on modal parameters of the concrete dam, which are often identified by seismic response sequences. In this work, except for the frequency‐domain index, time‐domain index is also extracted from the seismic response sequence and contributes to joint back‐analysis for dynamic material parameters. Due to different physical meanings and dimensions of two objective functions, a fast nondominated ranking genetic algorithm with elitist strategy is introduced to conduct the multiobjective optimization, and then, the Pareto optimal frontier of dynamic parameters of the concrete dam material is obtained. The seismic response sequence of a realistic concrete dam in China is analyzed using the proposed back‐analysis method. It shows that joint back‐analysis for dynamic material parameters of concrete dam material based on the time‐frequency domain has strong ability to identify parameters and good stability, which indicates good application prospect in practical engineering.

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“…An optimum number of modes also depends on the frequency content of the selected excitation. The three dimensional (3D) dynamic analyses of important complex flexible structures, such as arch dams, usually require the determination of a larger number of eigenvalues and eigenvectors [9][10][11][12][13]. This is especially true when the applied excitation has a higher level of power spectral density and a wide range of dominant frequencies of the Fourier amplitude spectrum.…”

Section: Introductionmentioning

confidence: 99%

Eigenvalue solution for arch dams: ADAD-IZIIS Software

2018

JCE

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3D earthquake analyses of complex engineering structures such as arch dams are based on the determination of a range of eigenvalues and associated eigenvectors. Despite the variety of practical numerical eigensolutions available in the literature, the method of subspace iteration was found to offer time efficient and accurate eigenvalue solutions appropriate for large systems with high degrees of freedom. This paper presents the theoretical principles of the well known subspace iteration method implemented in the existing ADAD-IZIIS software for finite-element analyses of arch dams.

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Finite element model updating effects on nonlinear seismic response of arch dam–reservoir–foundation systems

Cited by 56 publications

References 27 publications

Effects of model updating on the estimation of stochastic seismic response of a concrete-filled steel tubular arch bridge

Effects of model updating on the estimation of stochastic seismic response of a concrete-filled steel tubular arch bridge

Joint back‐analysis for dynamic material parameters of concrete dam based on time‐frequency domain information

Eigenvalue solution for arch dams: ADAD-IZIIS Software

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