کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
309379 513601 2012 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation concerning lipped channel columns undergoing local–distortional–global buckling mode interaction
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Experimental investigation concerning lipped channel columns undergoing local–distortional–global buckling mode interaction
چکیده انگلیسی

This work deals with the structural behaviour and ultimate strength of fixed-ended cold-formed steel lipped channel columns experiencing local–distortional–global buckling mode interaction, due to the closeness between the critical buckling stresses associated with these three buckling mode types. After briefly addressing the column specimen geometry selection and showing a few numerical elastic post-buckling results, the paper reports the results of an experimental investigation involving a set of 12 columns with several cross-section dimensions and yield stresses, which is aimed at (i) providing experimental evidence of the occurrence of the triple mode interaction under consideration and (ii) quantifying its effect on the column deformed configuration evolution and failure load erosion (drop). Various aspects concerning the test set-up and procedure are described in some detail before presenting and discussing the obtained column experimental results, which basically consist of (i) measured cross-section dimensions, lengths and initial displacements (geometrical imperfections), (ii) stress–strain curves and yield stresses determined from tensile coupon tests, (iii) recorded non-linear equilibrium paths (applied load vs. various relevant displacements) and ultimate strength values, and (iv) observed deformed configurations and collapse mechanisms.


► Structural response and ultimate strength of fixed-ended lipped channel columns affected by local–distortional–global mode interaction.
► Experimental investigation carried out in the Structures Laboratory of the Federal University of Rio de Janeiro.
► Characterisation of the column post-buckling behaviour and collapse mechanisms.
► Experimental evidence of the occurrence of distortional–global interaction, no local deformations perceptible prior to failure.
► Experimental results will be used to validate a shell finite element model and develop a Direct Strength Method (DSM) design approach accounting for local–distortional–global interaction.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin-Walled Structures - Volume 54, May 2012, Pages 19–34
نویسندگان
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