کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6694647 1428215 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel non-invasive seismic upgradation strategies for gravity load designed exterior beam-column joints
ترجمه فارسی عنوان
استراتژی ارتقاء لرزه نگاری غیر تهاجمی برای بار گرانشی اتصالات بیرونی ستون های ستونی طراحی شده است
کلمات کلیدی
ستون پرتو-ستون، ارتقاء، از بین بردن انرژی، تضعیف قدرت، معکوس چرخه،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
Existing gravity load designed (GLD) structures are vulnerable to seismic event due to their inherent weaknesses. The present study, focuses on the development of non-invasive and feasible strategies for seismic upgradation of these non-seismically designed structures. Three novel schemes, namely (i) single haunch upgradation scheme (U1), (ii) straight bar upgradation scheme (U2) and (iii) simple angle upgradation scheme (U3) are proposed for seismic upgradation of GLD specimens. The efficacy and effectiveness of these upgradation schemes are evaluated by conducting the reverse cyclic load tests on control and upgraded GLD exterior beam-column sub-assemblages. The performance of the upgraded specimens is compared with that of the control GLD beam-column sub-assemblage, in terms of load-displacement hystereses, energy dissipation capacities and global strength degradation behaviour. Tremendous improvement in the energy dissipation capacity to the tune of 2.63, 2.83 and 1.54 times the energy dissipated by the control GLD specimen is observed in single haunch upgraded specimens, straight bar upgraded specimen and simple angle upgraded specimen respectively. The specimen with single haunch upgradation performed much better compared to the GLD specimens upgraded with the other two schemes, by preventing the brittle anchorage failure, delaying the joint shear damage and redirecting the damage partially towards the beam.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Civil and Mechanical Engineering - Volume 18, Issue 2, February 2018, Pages 479-489
نویسندگان
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