کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
785513 1465309 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Interval analysis of nonlinear frames with uncertain connection properties
ترجمه فارسی عنوان
تجزیه و تحلیل فاصله فریم های غیر خطی با خواص اتصالات نامشخص
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• An interval analysis is used to account for uncertainties in semi-rigid connections.
• Both the initial stiffness and strain-hardening are modeled as interval data.
• A direct computation of the extreme structural responses is carried out.
• The analysis is formulated as a pair of the nonstandard optimization problems.
• A simple regularization algorithm is used to solve these optimizations problems.

Semi-rigid connections can often be a more economical solution for a framing system than one with either fully fixed connections or fully pinned ones. In view of the fact that the properties of such ductile and partial-strength connections are not known accurately, this paper presents a method for the obtention of both upper and lower bound responses of semi-rigid frames for possible variations in their moment-rotation properties. The latter are thus assumed to be known within some key upper and lower bound values, namely a constitutive law that is still deterministic but is described in terms of a so-called “interval” model. A mathematical programming approach is used to formulate and solve the problem. In particular, for each load level, a pair of nonstandard optimization problems known as interval mathematical programs with equilibrium constraints (or interval MPECs) are solved to provide the required bounds. A number of examples are provided to highlight the important effects of considering uncertainties in semi-rigid connection properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Non-Linear Mechanics - Volume 86, November 2016, Pages 83–95
نویسندگان
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