vertical reaction
vertical reaction
(OP)
Need to find out what will be vertical reaction on this truss, manually
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: vertical reaction
Review your classnotes.
RE: vertical reaction
RE: vertical reaction
another day in paradise, or is paradise one day closer ?
RE: vertical reaction
RE: vertical reaction
RE: vertical reaction
I doubt it is. His posting history is just too long (i.e. too many years) to be a student.
RE: vertical reaction
RE: vertical reaction
Basic truss solving methodology: Find external reactions first, then dive into truss to find internal forces if needed for a problem.
For this problem you can start by taking a moment down at L5. Taking a moment at this point leaves only 1 unknown item, which is the x-component of the force at U4.
The vertical component of the reaction at U4 goes through L5 so it creates no moment. All that is unknown is the horizontal component at U4, which you can solve for.
Once you have the horizontal component at U4, you can find the axial force in element U3-U4 by using sines/cosines. Or you can use sines/cosines to find the vertical reaction at U4. You know the direction of the force at that point, which is along the line U3-U4 and you also now know the x-component of this force.
Hope that helps.....
RE: vertical reaction
RE: vertical reaction
another day in paradise, or is paradise one day closer ?
RE: vertical reaction
Excellent. In addition, I got:
U2-U3= 78 kN (T)
U1-L3= 15.6 kN (C)
U2-M1= 31.2 kN (C)
RE: vertical reaction
student posts are not allowed. Correct me if this is for work, but it looks like a homework problem
I doubt it is. His posting history is just too long (i.e. too many years) to be a student.
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And dgkhan has received 11 votes on this very forum, to boot. At least 1 as far back as 2007
RE: vertical reaction
previous to that I was working long hand ...
L1-U1 is 12*13/5 = 31.2kN T
L1-L2 is 12*12/5 = 28.8kN C
U1-L2 is 12kN T
L2-L3 is 28.8kN C
U2-U1 is 46.8kN T
U1-L3 is 15.6kN C
... oh god, this is boring ...
another day in paradise, or is paradise one day closer ?