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

1940's rebar fy
i am looking at a reinforced concrete building from the 1940's. the drawings indicate fs = 20 ksi. until we have the rebar tested, i planned to use fy = 30 ksi to run preliminary numbers to estimate the loads this building can carry.
does anyone have experience with rebar of this vintage? what values of yield strength should we expect?
find a job or post a job opening
i would probably use 33 ksi if deformed bars. it could be well above that if it is either rail steel or square twisted (cold worked).
don't forget if your tests confirm a higher yield you may still have a development problem if your bars have the low deformation ribs of the 40's.
check out this paper.
good paper, structuraleit, i'll post it on my website.

2009-09-06, 10:40 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	1940s rebar fy 1940's rebar fy i am looking at a reinforced concrete building from the 1940's. the drawings indicate fs = 20 ksi. until we have the rebar tested, i planned to use fy = 30 ksi to run preliminary numbers to estimate the loads this building can carry. does anyone have experience with rebar of this vintage? what values of yield strength should we expect? find a job or post a job opening i would probably use 33 ksi if deformed bars. it could be well above that if it is either rail steel or square twisted (cold worked). don't forget if your tests confirm a higher yield you may still have a development problem if your bars have the low deformation ribs of the 40's. check out this paper. good paper, structuraleit, i'll post it on my website. __________________ 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]