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Old Apr 8th 2012, 07:00 PM   #1
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calculating forces in a truss, method of joints

The question is to calculate the forces ina ll members of the trussnby method of joints.

First i have calculated the reaction forces for A and B by taking the moment from both these points.
These came too: Ay=65N and By=55N

I do not know where to go from here, what point should i analyse first, i tried analysing point H however i am not sure how i should go about this, is F_hj equal to zero. and would CH equal to the force of AC.

Please help i am lost. i just need to know how to start, so maybe could you just help me solve two points and i can probably finish the rest. thank you for your time.
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Last edited by jaxta; Apr 8th 2012 at 09:41 PM.
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Old Apr 17th 2012, 12:30 AM   #2
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For these kind of questions you can go for the following method

break the truss into two parts where you'll end up breaking maximum three rods.
mark there forces. Now write three equations for the equilibrium of one of the parts

in this case I would write , and . Now solve for unknown three forces
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calculating, civil engineering, forces, joints, mechanis, method, statics, structures, truss



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