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aisc beam-column tables
in the 13th manual on page 6-5, there are beam-column selection tables based on section h of the specification. it also describes the use of these tables on pages 6-3 and 6-4 by plugging directly into the h1 equations and checking versus unity.
what i don't see is any mention of applying the b1 amplifier according to chapter c, or some other method of including second order effects between brace points. the comments on pages 6-3 and 6-4 basically say just check the h1 equations and that is it. i could see ignoring second order effects if the pc/pr ratio is low, but the comments to the tables also mention using the table values directly when pc/pr > 0.2.
all moments used for any strength check should already include any magnification effects due to member slenderness or sway. code-wise, chapter b requires that the general analysis and design of all
in hindsight now it is obvious since "mrx, mry" is shown in the equations on page 6-4, which as defined by c2-1a as including second order effects.

2009-09-07, 10:34 AM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	aisc beam-column tables aisc beam-column tables in the 13th manual on page 6-5, there are beam-column selection tables based on section h of the specification. it also describes the use of these tables on pages 6-3 and 6-4 by plugging directly into the h1 equations and checking versus unity. what i don't see is any mention of applying the b1 amplifier according to chapter c, or some other method of including second order effects between brace points. the comments on pages 6-3 and 6-4 basically say just check the h1 equations and that is it. i could see ignoring second order effects if the pc/pr ratio is low, but the comments to the tables also mention using the table values directly when pc/pr > 0.2. all moments used for any strength check should already include any magnification effects due to member slenderness or sway. code-wise, chapter b requires that the general analysis and design of all in hindsight now it is obvious since "mrx, mry" is shown in the equations on page 6-4, which as defined by c2-1a as including second order effects. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]