Adaptation of real earthquake records for their reproduction by a shaking table with limited stroke

Blostotsky, B.; Ribakov, Yuri; Agranovich, G.

doi:10.1007/s11803-010-0031-3

Cited by 3 publications

(14 citation statements)

References 5 publications

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“…To obtain a numerical indication regarding the response spectra distortion, the same integral evaluation criterion, similar with the previous research ‎, was used:

J = \frac{true \int_{0}^{\infty} true| S_{orig} ((), f) - S_{scal} ((), f) true| d f}{true \int_{0}^{\infty} true| S_{orig} ((), f) true| d T} \cdot 100 %

where S orig ( f ) is the original earthquake spectral acceleration for a structure with natural frequency, f , and S scal ( f ) is the scaled earthquake spectral acceleration for a structure with the same natural frequency. As the shake table platform stroke, required for reproduction of the original ground motion after trend elimination (Table ) increases, the value of the criterion also increases.…”

Section: Numerical Examplesmentioning

confidence: 99%

“…The properties of the columns are presented in Table . The structural response has been obtained for the selected earthquakes and for the following study cases.Case 1: original ground motion,Case 2: scaled earthquake, obtained using the previously proposed method ‎,Case 3: scaled earthquake, obtained using the proposed method.…”

Section: Numerical Examplesmentioning

confidence: 99%

“…At the same time, it can be shown that by choosing of the coefficients of criterion (4), it can be ensured that solution of (2), (3) leads to satisfaction of conditions (1) and (3), or (2) and (3). Thus, solution of the original problem can be reduced by solving Equations (3) and (4) and selecting the performance index coefficients using further developed Equation (8).…”

Section: Mathematical Formulation Of the Problemmentioning

confidence: 99%

“…To obtain a numerical indication regarding the response spectra distortion, the same integral evaluation criterion, similar with the previous research [8,9], was used:…”

Section: Reproducing Earthquake Recordsmentioning

confidence: 99%

“…Case 1: original ground motion, Case 2: scaled earthquake, obtained using the previously proposed method [8], Case 3: scaled earthquake, obtained using the proposed method.…”

Section: Simulating Structural Response To Original and Scaled Earthqmentioning

confidence: 99%

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Scaling ground motions using optimal feedback control for testing structures by shake table

Agranovich

Ribakov

2012

Struct. Control Health Monit.

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Shake tables are widely used for testing structural models subjected to earthquakes. Time histories of real ground motions are reproduced by a moving shake table platform, controlled using an appropriate algorithm, considering the limitations in the platform's maximum displacement. As the real peak ground displacement is usually higher, compared with the platform's stroke, the earthquake records are scaled. Scaling yields distortion in the ground motion spectrum and consequently changes the influence of the earthquake on the tested structure. A method for minimization of the undesired effects, on the basis of linear models of a tested structure, was developed previously. Closeness of power spectral density to response spectra was chosen as the main criterion of scaling efficiency. However, strong earthquakes lead to nonlinear effects in structural response. Supplemental active and passive devices are widely applied for enhancing structural seismic response. Active and semi‐active devices are activated according to structural dynamic behavior, measured during the earthquake. But if the accelerations in the measured feedback include high distortions, control will not be effective as desired. An earthquake record scaling method, proposed in this study, is based on criteria that are more consistent with the tested structure. A mathematical formulation of the problem is developed. Effectiveness of the proposed method is demonstrated by comparing the total earthquake energy and response spectra of real and scaled earthquakes as well as by comparative evaluation of the acceleration distortions of their time histories. Response of two multistory structural models to real and scaled seismic records is compared to demonstrate the proposed method's efficiency, accuracy and convenience. Copyright © 2012 John Wiley & Sons, Ltd.

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“…To obtain a numerical indication regarding the response spectra distortion, the same integral evaluation criterion, similar with the previous research ‎, was used:

J = \frac{true \int_{0}^{\infty} true| S_{orig} ((), f) - S_{scal} ((), f) true| d f}{true \int_{0}^{\infty} true| S_{orig} ((), f) true| d T} \cdot 100 %

Section: Numerical Examplesmentioning

confidence: 99%

Section: Numerical Examplesmentioning

confidence: 99%

Section: Mathematical Formulation Of the Problemmentioning

confidence: 99%

“…To obtain a numerical indication regarding the response spectra distortion, the same integral evaluation criterion, similar with the previous research [8,9], was used:…”

Section: Reproducing Earthquake Recordsmentioning

confidence: 99%

“…Case 1: original ground motion, Case 2: scaled earthquake, obtained using the previously proposed method [8], Case 3: scaled earthquake, obtained using the proposed method.…”

Section: Simulating Structural Response To Original and Scaled Earthqmentioning

confidence: 99%

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Scaling ground motions using optimal feedback control for testing structures by shake table

Agranovich

Ribakov

2012

Struct. Control Health Monit.

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Evaluation of the dynamic characteristics of a super tall building using data from ambient vibration and shake table tests by a Bayesian approach

Zhang

Ventura

Xiong

et al. 2017

Struct Control Health Monit

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Summary The Shanghai Tower is a newly built 127‐story and 632 m high super tall building. As of April 2017, it was ranked as the second tallest building in the world. Its main structural system is a mega‐frame‐tube‐outrigger system with six outrigger trusses along the height. Due to its unique structural configuration, a series of field and laboratory model tests have been conducted to better understand its dynamic characteristics. Before its construction, a scaled model of the tower was tested on a shake table, and the results were used to refine the design of the tower. At the completion of the construction, full‐scale ambient vibration tests were performed. A Bayesian method was used to perform operational modal analysis from the shake table and full‐scale ambient vibration tests. The most probable value of the modal parameters and the associated posterior uncertainties were calculated using this method. The first eight modes were identified, including three translational modes in each principal direction and two torsional modes. Using these results, the dynamic characteristics and associated uncertainties obtained from the two tests were investigated and compared in this paper. Due to the scaling of the model, there are some discrepancies between the natural frequencies obtained from two different tests, but the identified mode shapes matched very well. Although the structure was designed in a very innovative manner, its dynamic characteristics are similar to regular tall buildings. The results from this investigation provide valuable information for an ongoing condition assessment of this super tall building.

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Development of a double-layer shaking table for large-displacement high-frequency excitation

Pan

Guo

Kang

et al. 2022

Earthq. Eng. Eng. Vib.

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Adaptation of real earthquake records for their reproduction by a shaking table with limited stroke

Cited by 3 publications

References 5 publications

Scaling ground motions using optimal feedback control for testing structures by shake table

Scaling ground motions using optimal feedback control for testing structures by shake table

Evaluation of the dynamic characteristics of a super tall building using data from ambient vibration and shake table tests by a Bayesian approach

Development of a double-layer shaking table for large-displacement high-frequency excitation

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