• on the use of the half-power bandwidth method to estimate damping in building structures

    کلمات کلیدی :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1099
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the objective of this note is to assess the accuracy of the half-power bandwidth method for the estimation of damping ratios in single- and multi-degree-of-freedom structures with linear viscous damping including those that do not possess classical normal modes. this is done by performing some numerical experiments involving single- and multi-degree-of-freedom structures. it is found that the use of the half-power bandwidth method in its classical form may lead to significant errors, while a third order correction to this classical form provides conservative and more reliable results. it is also found in conjunction with this correction that application of the half-power bandwidth method should be performed to the acceleration frequency response transfer function of the structure on a mode-to-mode basis and that its damping ratio estimates for higher modes should always be viewed with caution.

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