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

prestressed piles interaction charts
does anyone know where to obtain interaction charts for various size square prestressed concrete piles?
thanks!
check out our whitepaper library.
my first suggestion would be to contact the prestressed concrete institute (pci). if they don't have them, they most likely would know where to find them.
for piles in clay you could consider using the converse-labarre formula to compute the effiency (%) of a specified group of piling compared to the performance on an isolated pile.
e = 1 - (a/90) x ((n-1)m + (m-1)n) / mn
gees... reminds me of writing equations in fortran 2!
e = effiency of pile group
a = arc tan (d / s)
d = pile width
s = pile spacing, center to center
m = number of rows of piles
n = number of piles in each row
(note: if i put some of my parentheses in the wrong place just search on google for the formula - you'll find it.)
holiver77!
jheidt2543 suggestion is a good idea. you could find some charts of square, hollow鈥?pipe at their website
you can get this at:

2009-09-15, 02:42 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	prestressed piles interaction charts prestressed piles interaction charts does anyone know where to obtain interaction charts for various size square prestressed concrete piles? thanks! check out our whitepaper library. my first suggestion would be to contact the prestressed concrete institute (pci). if they don't have them, they most likely would know where to find them. for piles in clay you could consider using the converse-labarre formula to compute the effiency (%) of a specified group of piling compared to the performance on an isolated pile. e = 1 - (a/90) x ((n-1)m + (m-1)n) / mn gees... reminds me of writing equations in fortran 2! e = effiency of pile group a = arc tan (d / s) d = pile width s = pile spacing, center to center m = number of rows of piles n = number of piles in each row (note: if i put some of my parentheses in the wrong place just search on google for the formula - you'll find it.) holiver77! jheidt2543 suggestion is a good idea. you could find some charts of square, hollow鈥?pipe at their website you can get this at: __________________ 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]