Tibby
Structural
- Oct 7, 2002
- 7
I have this situation. Steel Fy=50. A pretty long wideflange (W) simply supported, and in the middle, undernith, a monorail (S shape) passing perpendicular to the supporting W beam - BOLTED to the wideflange! Top flange of the MR is against the bottom flange of the W beam. At the intersection I have 2 full depth stiffeners on the W beam and a total of 4 bolts connecting the flanges of the two members (one in each quadrant formed by the web of W and the stiffeners).
In the bottom flange of the W member I get a general tension stress due to the global bending of the member and also local bending stresses (the load travels from the bolt towards the stiffener on a tributary area and I have the flange behaving as a plate in weak axis bending). Both these stresses are having the same direction -> along the member so I can just add them. The results : top fiber of the bottom flange is at 42 ksi (tension), bottom fiber of the bottom flange about 0 ksi.
I'm not interested in finding a way to reduce the 42 ksi, I'm rather interested in finding the documentation that would say this stress is too much or it is acceptable in such and such situations.
Note: The bending stresses in the W member from the
global bending are OK.
The local bending of the flange alone is OK - (stresses are less than 0.75 Fy)
Thank you,
Tibby.
In the bottom flange of the W member I get a general tension stress due to the global bending of the member and also local bending stresses (the load travels from the bolt towards the stiffener on a tributary area and I have the flange behaving as a plate in weak axis bending). Both these stresses are having the same direction -> along the member so I can just add them. The results : top fiber of the bottom flange is at 42 ksi (tension), bottom fiber of the bottom flange about 0 ksi.
I'm not interested in finding a way to reduce the 42 ksi, I'm rather interested in finding the documentation that would say this stress is too much or it is acceptable in such and such situations.
Note: The bending stresses in the W member from the
global bending are OK.
The local bending of the flange alone is OK - (stresses are less than 0.75 Fy)
Thank you,
Tibby.