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Earthquakes and Structures
  Volume 15, Number 6, December 2018 , pages 595-603

Statistical reference values for control performance assessment of seismic shake table testing
Pei-Ching Chen, Meng-Kwee Kek, Yu-Wei Hu and Chin-Ta Lai

    Shake table testing has been regarded as one of the most effective experimental approaches to evaluate seismic response of structural systems subjected to earthquakes. However, reproducing a prescribed acceleration time history precisely over the frequency of interest is challenging because shake table test systems are eventually nonlinear by nature. In addition, interaction between the table and specimen could affect the control accuracy of shake table testing significantly. Various novel control algorithms have been proposed to improve the control accuracy of shake table testing; however, reference values for control performance assessment remain rare. In this study, reference values for control performance assessment of shake table testing are specified based on the statistical analyses of 1,209 experimental data provided by the Seismic Simulator Laboratory of National Center for Research on Earthquake Engineering in Taiwan. Three individual reference values are considered for the assessment including the root-mean-square error of the achieved acceleration time history; the percentage of the spectral acceleration that exceeds the determined tolerance range over the frequency of interest; and the error-ratio of the achieved peak ground acceleration. Quartiles of the real experimental data in terms of the three objective variables are obtained, providing users with solid and simple references to evaluate the control performance of shake table testing. Finally, a set of experimental data of a newly developed control framework implementation for uni-axial shake tables are used as an application example to demonstrate the significant improvement of control accuracy according to the reference values provided in this study.
Key Words
    seismic shake table; performance assessment; root-mean-square error; spectral acceleration; peak ground acceleration
Pei-Ching Chen: Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, No.43, Sec.4, Keelung Rd., Taipei 10607, Taiwan
Meng-Kwee Kek, Yu-Wei Hu: Department of Civil Engineering, National Taiwan University, No.1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan
Chin-Ta Lai: National Center for Research on Earthquake Engineering, National Applied Research Laboratories, No.200, Sec. 3, HsinHai Rd., Taipei 10668, Taiwan

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