مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Verion
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

video

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

sound

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Version

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View:

150
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Download:

0
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Cites:

Information Journal Paper

Title

Vibration Isolation on the Foundation of Shaking Tables and its Effects on Operational Performance of the Table and its Surrounding Environment

Pages

  67-81

Abstract

 Using Shaking Tables in experimental studies on buildings or other installations subjected to earthquake actions are considered inevitable in many circumstances. Due to their unique abilities in simulating ground motion effects on prototype systems, such facilities can provide the researcher with the most accurate and sophisticated results on the role of earthquake actions on the specimen under investigation. However, providing accuracy in ground motion simulation for Shaking Tables needs careful attention to its subsystems and dynamic interaction between them (specimen, table, actuators, control system and the foundation). In fact there is the possibility of a strong interaction between the Shaking Table itself and the specimen under investigation depending on its weight and frequency contents. Interaction between the table and its foundation assembly can also be considered important in certain cases. In addition, during Shaking Tables operation some vibrational force and energy can be transferred to its surrounding environment and causes undesirable effects in the nearby buildings. In this case, Vibration Isolation for the foundation of Shaking Table can partially solve this problem. However, it may also intensify the interaction between the table and its foundation that needs to be addressed properly to maintain the accuracy of the system in ground motion simulation. In this work a simplified model for investigation on the role of Vibration Isolation on foundation of Shaking Table assembly is proposed that takes into account the interaction problems among all subsystems of Shaking Tables. A large number of time integration analysis subjected to actual earthquake records (applied in the table’ s degree of freedom) have been carried out on this model. According to the results of this study, Vibration Isolation on a 4000 tons foundation of a typical middle size Shaking Table (6 by 6 meters in size with the weight of 40 tons) reduces, on average, the level of maximum acceleration transferring to the ground to about 1/3 of that for the non-isolated system. This has happened in the expenses of about ± 3 mm maximum lateral displacement for the foundation with respect to the ground. However, the results in this case also signifies sensible changes in the actuator’ s force, stroke and frequency demands that have to be provided to meet the required accuracy in the ground motion simulation. In addition, according to the results of this study the dominant frequency of vibration that transfers to the ground and the surrounding environment in case of non-isolated foundation is in the range of 8 to 15 Hertz while in the isolated system a low amplitude dominant frequency exist within the range of 5 Hz. Such results vary with the change in the mass and natural frequency of the specimen subsystem. According to these results Vibration Isolation for the foundation of Shaking Table is quite effective in reducing vibrational effects transferring to the surrounding environment and nearby buildings. On the other hand, using Vibration Isolation technique in design process for foundation of Shaking Tables may require a major upgrade in the technical specifications for actuators of the table and a need for more sophisticated control system hardware and its add-on algorithm and software.

Cites

  • No record.

    • References

  • No record.

    • Cite

    APA: Copy

    NABATI, FARZANEH, & ZIYAEIFAR, MANSOUR. (2021). Vibration Isolation on the Foundation of Shaking Tables and its Effects on Operational Performance of the Table and its Surrounding Environment. BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING, 8(2 ), 67-81. SID. https://sid.ir/paper/959143/en

    Vancouver: Copy

    NABATI FARZANEH, ZIYAEIFAR MANSOUR. Vibration Isolation on the Foundation of Shaking Tables and its Effects on Operational Performance of the Table and its Surrounding Environment. BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING[Internet]. 2021;8(2 ):67-81. Available from: https://sid.ir/paper/959143/en

    IEEE: Copy

    FARZANEH NABATI, and MANSOUR ZIYAEIFAR, “Vibration Isolation on the Foundation of Shaking Tables and its Effects on Operational Performance of the Table and its Surrounding Environment,” BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING, vol. 8, no. 2 , pp. 67–81, 2021, [Online]. Available: https://sid.ir/paper/959143/en

    Related Journal Papers

  • No record.

    • Related Seminar Papers

  • No record.

    • Related Plans

  • No record.

    • Recommended Workshops






    Move to top
    telegram sharing button
    whatsapp sharing button
    linkedin sharing button
    twitter sharing button
    email sharing button
    email sharing button
    email sharing button
    sharethis sharing button