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slenderness ratio & compressive resistance of steel bridge m
steel compression members for bridges are limited to a slenderness ratio of 120. if i have diagonal truss members that exceed this limit, how do i obtain the compressive resistance of the member, as code formulas must satisfy the limit of the slenderness ratio?
right now, i'm thinking that buckling effects must then be considered, but there's no guidance in the bridge code (i'm using the canadian code, but aashto would be similar).
any help is much appreciated!

you can run lateral bracing across them. whether a truck will hit them is another question. that becomes a real design problem sometimes. maybe you can angle them up.
good luck
actually, it's an existing bridge and we're doing the structural evaluation, so it's a matter of determining the demand/capacity ratio. right now, the problem is trying to figure out the resistance of existing diagonal member built-up of 2 angles not placed back-to-back, but like a c-shape with an open space in the middle.
thanks.

2009-09-15, 11:38 PM	#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	slenderness ratio compressive resistance of steel bridge m slenderness ratio & compressive resistance of steel bridge m steel compression members for bridges are limited to a slenderness ratio of 120. if i have diagonal truss members that exceed this limit, how do i obtain the compressive resistance of the member, as code formulas must satisfy the limit of the slenderness ratio? right now, i'm thinking that buckling effects must then be considered, but there's no guidance in the bridge code (i'm using the canadian code, but aashto would be similar). any help is much appreciated! you can run lateral bracing across them. whether a truck will hit them is another question. that becomes a real design problem sometimes. maybe you can angle them up. good luck actually, it's an existing bridge and we're doing the structural evaluation, so it's a matter of determining the demand/capacity ratio. right now, the problem is trying to figure out the resistance of existing diagonal member built-up of 2 angles not placed back-to-back, but like a c-shape with an open space in the middle. thanks. __________________ 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]