By Xiao-Ling Zhao
Chilly shaped structural participants are getting used extra commonly in regimen structural layout because the international metal strikes from the creation of hot-rolled part and plate to coil and strip, frequently with galvanised and/or painted coatings. metal during this shape is extra simply brought from the metal mill to the producing plant the place it's always cold-rolled into open and closed part members.
This booklet not just summarises the study played thus far on chilly shape tubluar contributors and connections but additionally compares layout ideas in a variety of criteria and offers useful layout examples
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Extra info for Cold-Formed Tubular Members and Connections. Structural Behaviour and Design
1. The buckling resistance moment (Mb) is calculated using the same equations as the section capacity equations given above, but using Pb rather than py. 20) The ratio pb/py could be considered equivalent to the slenderness reduction factor as in AS 4100. 21) mmax where Mmax is the maximum bending moment in the segment, and M2,/143, M4 are the values of bending moment at the quarter points of the segment, mLV is the equivalent of the reciprocal of the AS 4100 term am. The member moment capacity is then taken as the lesser of the Mc and Mb/mLT.
5t "" :" . / Neutral axis of gross section . . . . . . . .............. ~. . . . . . . I 0 0 . . - 1/ .... ~ ]" / t. . . . . . . . . . . . . . . . . Neutral axis of effective section . . . . . "V'"" J n / 11 /I o a o t ! :T-F- . Cross-section with slender web f~w &ftw used to determine bar should be based on a cross-section in which the web is taken as fully effective, using the effective width of the compression flange if this is Class 4 slender. 12) where f~w is the maximum compressive stress in the web, fw is the maximum tensile stress in the web andfyw is the yield stress of the web.
Solution according to AS 4100 1. 50 mm. kJ .... b= 50mm d = 100 mm t = 2 . 9 100 mm a2 "-, ' ' 2. 5 Flange slenderness limits, L~fp= 30 (plastic); ~fy = 40 (yield) Hence the flange is compact. 5 Web slenderness limits, kewp = 82 (plastic); ~fy = 115 (yield) Hence the web is compact. 93 Members Subjected to Bending 51 3. 15 k N m Solution according to BS 5950 Part 1 1. 886 2. 8 Hence the flange is Class 1. 62 Hence the web is Class 1. The section is Class 1. 3. 95 k N m Discussion This was a simple example and the calculations might be considered trivial.
Cold-Formed Tubular Members and Connections. Structural Behaviour and Design by Xiao-Ling Zhao