几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 - 查看单个帖子 - web crippling of a w-beam encased in concrete

web crippling of a w-beam encased in concrete ??
if a wide flanged beam is encased in concrete (no mesh so i cant consider it composite), do i need to check for web crippling, and web yielding for the concentrated load on the beam?
is there any reference out there that covers this??
thanks
check out our whitepaper library.
i'm not aware of any reference...i would probably not consider the concrete as resisting web crippling or providing any other help if:
1. the concrete is simply unreinforced, cast fire proofing for the beam, or
2. the concrete might be removed someday for whatever reason, or
3. the beam and concrete is in any way exposed to potential moisture infiltration where rusting and spalling of the concrete might occur (i've seen this happen in buildings a lot).
i all of these cases, the concrete may not be considered structural by some future engineer or owner and the concrete removal would create a loss of capacity and safety without anyone (except for you) knowing it.
if the concrete is cast-in, integral with a slab, and reinforced, then perhaps you could then consider its benefits in regards to web crippling, ltb, etc.
thanks jae,
thats a good answer. this is an existing building and we have removed concrete from steel beams in other areas to investigate the existing conditions. i wouldn't like to rely on this concrete only to have someone else in 50 years remove it to investigate this connection.
thanks
t

2009-09-16, 07:24 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	web crippling of a w-beam encased in concrete web crippling of a w-beam encased in concrete ?? if a wide flanged beam is encased in concrete (no mesh so i cant consider it composite), do i need to check for web crippling, and web yielding for the concentrated load on the beam? is there any reference out there that covers this?? thanks check out our whitepaper library. i'm not aware of any reference...i would probably not consider the concrete as resisting web crippling or providing any other help if: 1. the concrete is simply unreinforced, cast fire proofing for the beam, or 2. the concrete might be removed someday for whatever reason, or 3. the beam and concrete is in any way exposed to potential moisture infiltration where rusting and spalling of the concrete might occur (i've seen this happen in buildings a lot). i all of these cases, the concrete may not be considered structural by some future engineer or owner and the concrete removal would create a loss of capacity and safety without anyone (except for you) knowing it. if the concrete is cast-in, integral with a slab, and reinforced, then perhaps you could then consider its benefits in regards to web crippling, ltb, etc. thanks jae, thats a good answer. this is an existing building and we have removed concrete from steel beams in other areas to investigate the existing conditions. i wouldn't like to rely on this concrete only to have someone else in 50 years remove it to investigate this connection. thanks t __________________ 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]