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pony truss stability
using the holt procedure (t.v. galambos, "guide to stability design criteria for metal structures,"5th ed., wiley).
table 15.1 has various values for 1/k values for cl/p and n, however it only goes to 16 panels. how would you extrapolate values for a 18, 20 and 22 panel truss?
would you use both the value interpolated from colum 16 panels only, and then from the lutz fisher column only? the one that gives the biggest buckling factor k you should be able to use for one conservative result.
aastho recommends the timoshenko method for highway pony trusses and the holt method for pedestrian bridges, why differnt recommended methods?
thanks, rich

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2009-09-15, 01:30 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	pony truss stability pony truss stability using the holt procedure (t.v. galambos, "guide to stability design criteria for metal structures,"5th ed., wiley). table 15.1 has various values for 1/k values for cl/p and n, however it only goes to 16 panels. how would you extrapolate values for a 18, 20 and 22 panel truss? would you use both the value interpolated from colum 16 panels only, and then from the lutz fisher column only? the one that gives the biggest buckling factor k you should be able to use for one conservative result. aastho recommends the timoshenko method for highway pony trusses and the holt method for pedestrian bridges, why differnt recommended methods? thanks, rich __________________ 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]