کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
284592 509153 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Probabilistic performance assessment of gravity-designed steel frame buildings using buckling-restrained knee braces
ترجمه فارسی عنوان
ارزیابی عملکرد احتمالی ساختارهای قاب فولادی طراحی شده توسط جاذبه با استفاده از اتصالات زانویی محکم شده
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Probabilistic performance for gravity-designed steel frame building was evaluated.
• 75 types of Buckling-Restrained Knee Brace (BRKB) models were considered.
• Using a rapid fragility contour, a seismic retrofit scheme of BRKBs was developed.
• The building with the optimum BRKBs was satisfied with a code-defined performance.

In building design codes, buildings having less than 3 stories and a floor area less than 1000 m2 are generally defined as small-scale buildings, and these are generally exempted from seismic requirements. To prevent potential loss of life and economic damage in the event of an earthquake, such buildings should be retrofitted so as to conform to current seismic design codes. In this study, a seismic retrofit scheme using buckling-restrained knee brace (BRKBs) was developed for a 2-story non-seismic gravity-designed steel frame building using the fragility contour method. To develop an effective retrofit scheme using BRKB for this building, 75 types of BRKB analytical models were used to achieve the desired performance levels and analyzed. Then, the seismic performance of the building before and after the retrofit was evaluated using the fragility contour method, and the improvement in the performance level of the probability against the structural limit state, such as component failures and structural collapse, was investigated. Based on the analytical studies, the most effective BRKB model for the retrofit scheme was proposed based on various scenarios in terms of the weight of the developed BRKB models. This study shows that the fragility contour method can be used for rapid evaluations and should be an effective tool for structural engineers to perform the seismic retrofit of buildings.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Constructional Steel Research - Volume 104, January 2015, Pages 250–260
نویسندگان
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