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buckling strength of bracing with cut and reinforcement
hi,
i have a situation in calculating bracing strength. the flanges of an existing w8x31 bracing is to be chopped at middle at one side, the cut is 3鈥?deep curved. the disturbed length is about 2ft. the center to center support distance of the bracing is about 12鈥?6鈥? with a 陆鈥?plate welded to the other side of the cutting along the length, the sectional properties is equivalent to the intact section. along the chopped length the member is offset 0鈥?to 2.7鈥?/-, there will be bending moment along the length because of the eccentricity and axial force. question: how to calculate the bracing strength in this case?
thanks for comments
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nobody ever encountered this? it's like a straight bar with a shallow arc in a short portion.
my thought is the strength (with lateral-torsional buckling) is higher than the strength with the bending moment parabolically distributed to the whole length. the effect is somehow bending-moment length related.
the bending moment is usually very small except for in the bracing with huge axial force.

2009-09-07, 05:28 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	buckling strength of bracing with cut and reinforcemen buckling strength of bracing with cut and reinforcement hi, i have a situation in calculating bracing strength. the flanges of an existing w8x31 bracing is to be chopped at middle at one side, the cut is 3鈥?deep curved. the disturbed length is about 2ft. the center to center support distance of the bracing is about 12鈥?6鈥? with a 陆鈥?plate welded to the other side of the cutting along the length, the sectional properties is equivalent to the intact section. along the chopped length the member is offset 0鈥?to 2.7鈥?/-, there will be bending moment along the length because of the eccentricity and axial force. question: how to calculate the bracing strength in this case? thanks for comments check out our whitepaper library. nobody ever encountered this? it's like a straight bar with a shallow arc in a short portion. my thought is the strength (with lateral-torsional buckling) is higher than the strength with the bending moment parabolically distributed to the whole length. the effect is somehow bending-moment length related. the bending moment is usually very small except for in the bracing with huge axial force. __________________ 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]