Moment of Inertia of a typical trapezoidal-type corrugated sheets.

[dkgpune]

HI,

Could you anybody support in finding out Moment of Inertia and Moment of Resistance for a Sheet with following characteristics.

attached is a figure with key generic dimensions.

Any help/pointers/formulas would be greatly appreciated.

Thanks,

DG

 

[robyengIT]

1 - see attached data sheet

2 - you can make a drawing with autocad and find it easily

 

[rb1957]

post pdf not docx.

without seeing your sketch, change the sloping sides of the trapezium with vertical sides, so now the section is a bunch of rectangles, horizontal and vertical.

make sure not to double count any areas. the vertical rectangle can be placed at the mid-point of the sloping side, if you have to worry about the other axis.

clear as mud ?

another day in paradise, or is paradise one day closer ?

 

[UcfSE]

Depending on your area of practice, you may need the effective properties, not just the gross properties you would calculate using AutoCAD's "massprop" command. In North America, you would use the AISI's NASPEC code to find the effective section properties. The effective section properties are used in lieu of the gross section properties to account for the loss of stiffness due to local instability of the cross section.

For gross properties only, AutoCAD is a good suggestion. If you need to repeat this for many shapes and variations, a software intended for this would serve better.

 

[drawoh]

dkgpune,

Your corrugated sheet is equivalent to a channel with vertical and somewhat thicker sides. That increase thickness can be calculated.

--
JHG

 

[JStephen]

I can't see what it looks like...is the manufacturer any help?
By any chance is it sheet piling?