Mar 1, 2007 #1 etabs2002 Civil/Environmental Feb 22, 2003 11 If girder got camber 2" how much that will be change lenght of the girder. How to calculate?
Mar 1, 2007 #2 JStephen Mechanical Aug 25, 2004 8,620 Assume the centerline length along the arc stays constant. With a small camber, the change in length should be fairly negligible. Example: With a 14,400" rolling radius and a 480" long beam, I get a 2" camber and a change in length due to curvature of 0.022". Upvote 0 Downvote
Assume the centerline length along the arc stays constant. With a small camber, the change in length should be fairly negligible. Example: With a 14,400" rolling radius and a 480" long beam, I get a 2" camber and a change in length due to curvature of 0.022".
Mar 3, 2007 #3 kxa Structural Nov 16, 2005 207 How did you come up with 14400" for the radius? I get R=1200". Anyway, I agree the length change is megligible. Besides, once it is installed it will straighten out somewhat. Upvote 0 Downvote
How did you come up with 14400" for the radius? I get R=1200". Anyway, I agree the length change is megligible. Besides, once it is installed it will straighten out somewhat.
Mar 4, 2007 #4 wannabeSE Civil/Environmental Feb 23, 2007 1,251 kxa, One way is to use Pythagorean's theorem: radius²=(½ span)²+(radius-camber)² This reduces to radius=[¼span²+camber²]/[2camber]. The arc length = 2radius*asin(½span/r) Upvote 0 Downvote
kxa, One way is to use Pythagorean's theorem: radius²=(½ span)²+(radius-camber)² This reduces to radius=[¼span²+camber²]/[2camber]. The arc length = 2radius*asin(½span/r)
