دانلود مقاله انگلیسی رایگان:تجزیه و تحلیل طیف پاسخ غیرخطی سازه های مجهز به میراگر چسبناک قانون غیرخطی - 2020
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  • Nonlinear response spectrum analysis of structures equipped with nonlinear power law viscous dampers Nonlinear response spectrum analysis of structures equipped with nonlinear power law viscous dampers
    Nonlinear response spectrum analysis of structures equipped with nonlinear power law viscous dampers

    سال انتشار:

    2020


    عنوان انگلیسی مقاله:

    Nonlinear response spectrum analysis of structures equipped with nonlinear power law viscous dampers


    ترجمه فارسی عنوان مقاله:

    تجزیه و تحلیل طیف پاسخ غیرخطی سازه های مجهز به میراگر چسبناک قانون غیرخطی


    منبع:

    Sciencedirect - Elsevier - Engineering Structures, 219 (2020) 110857: doi:10:1016/j:engstruct:2020:110857


    نویسنده:

    Afshin Moslehi Tabara,⁎, Dario De Domenicob,⁎


    چکیده انگلیسی:

    Response spectrum analysis is recognized as a reliable and practical method for dynamic analysis of structures subjected to earthquake excitation. However, for structures equipped with nonlinear viscous dampers (NVDs), the classical linear response structural analysis cannot be applied due to the nonlinearity induced by such devices, typically in the form of a power law function of the velocity. In this paper, the nonlinear differential equation governing the dynamic response of a single-degree-of-freedom (SDOF) system equipped with NVD is first converted into a set of surrogate linear differential equations using the perturbation technique. The first linear system (zero order) is excited by the real earthquake acceleration time-history, whereas the other SDOF surrogate systems are subjected to virtual excitations based on the velocity responses resulting from the previous linear equations (in a recursive fashion). By performing response spectrum analysis on each surrogate SDOF linear equation and combining the results, the nonlinear response spectrum is estimated. By using Fourier transform and simplifying the frequency-dependent functions, a convenient method is presented for practical design purposes. The proposed method lends itself to be readily adopted in international codes of practice by establishing an equivalent damping ratio. The proposed method, introduced for a SDOF system, is easily extended to multi-storey building structures equipped with different NVDs, and applied to a two-story and to two six-story building frames. The results obtained through the proposed method are in very good agreement with results obtained by nonlinear time-history analyses for a wide set of parameter combinations.
    Keywords: Nonlinear response spectrum analysis | Nonlinear viscous damper | Earthquake engineering | Perturbation technique | Power law damping | Fourier transform | Seismic analysis | Response spectrum method


    سطح: متوسط
    تعداد صفحات فایل pdf انگلیسی: 11
    حجم فایل: 1271 کیلوبایت

    قیمت: رایگان


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