کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
284372 509141 2015 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of beam stiffness on seismic response of chevron concentric bracings
ترجمه فارسی عنوان
تأثیر سختی پرتو در پاسخ لرزهای برچسبی متشکل از شفرون
کلمات کلیدی
شورون عمدتا قاب قاب، پاسخ لرزه ای، طراحی ظرفیت سفتی، سختی، تقاضای انعطاف پذیری، انقباض بند
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• The seismic behaviour of chevron braced frames is investigated.
• A numerical parametric study has been carried out.
• The influence of the beam stiffness on the overall response is studied.
• Empirical equations to estimate brace ductility and beam stiffness are provided.
• Design criteria have been proposed to improve the response of chevron braced frames.

The seismic response of steel chevron concentric bracings is significantly influenced by the flexural behaviour of the brace-intercepted beam. The capacity design criteria provided by current codes aim both at avoiding the formation of plastic hinge into the beam following the brace buckling and at guaranteeing the energy dissipation by yielding in tension of the brace. However, besides the strength, the beam flexural stiffness has a key role in order to assure the formation of such failure mechanism. Indeed, structures with strong and deformable beams are characterized by poor seismic performance, showing severe damage concentration in the braces under compression, while those in tension behave elastically. In order to investigate this aspect, a comprehensive numerical parametric study is presented and described in this paper. In particular, the influence of beam flexural stiffness on chevron concentric bracings is analysed ranging the ratio between the beam flexural stiffness and the braces vertical rigidity, the beam span, the interstorey height and the brace slenderness. Analytical equations based on the regression of numerical data have been proposed as design aid in order to select the optimal beam stiffness depending on both the required brace ductility and interstorey drift ratio.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Constructional Steel Research - Volume 112, September 2015, Pages 305–324
نویسندگان
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