Characterizing Effects of Near-fault Earthquakes in Context of Response Spectra

  • سال انتشار: 1404
  • محل انتشار: ماهنامه بین المللی مهندسی، دوره: 38، شماره: 2
  • کد COI اختصاصی: JR_IJE-38-2_001
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 102
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نویسندگان

V. V. Cao

Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam

چکیده

This paper characterized the effects of near-fault earthquakes in the context of response spectra. ۸۴ real earthquake records, including ۴۲ near-fault and ۴۲ far-fault records, were selected based on six velocity spectrum intensities. The results revealed that near-fault ground motions do not always impose higher demand on structures than far-fault ground ones, whereas the effects of near-fault earthquakes depend on the fundamental periods (T) of structures; therefore, constant scaling of the response spectrum over the whole period domain seems inappropriate for all structures. For structures with T ≤ ۱.۱۷s, near-fault motions have much higher acceleration response spectra than far-fault ones. In contrast, for structures with T ≥ ۱.۱۷s, near-fault motions have lower acceleration response spectra than far-fault ones. A scaling factor of ۱.۲۹۴ is proposed to scale the acceleration response spectra of far-fault motions to account for the effects of near-fault earthquakes on structures with T ≤ ۱.۱۷s. When T ≥ ۱.۱۷s, scaling is not recommended. The outcomes of this study can be useful for structural engineers in the seismic design of structures in near-fault earthquake regions.

کلیدواژه ها

Near-fault earthquake, Far-fault earthquake, Response Spectrum, structure, Near-fault factor, Single Degree of Freedom

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