Summary:: Require to determine the designated forces using principle of virtual work ( unit force method )
I have no idea how to determine the multispan beam using virtual work, if I start to analyse the subsidiary portion BC member, the Yc can be calculated and following by the Ma... it seems...
Summary:: The question requires us to determine the axial forces using method of sections but it is statically indetermine structure
Can I make up one more equation by summing the moment at point O ?
Summary:: The question requires us to determine the member forces using method of joints but I couldn’t figure out how to calculate the support reaction forces
I tried to use equilibrium equations to solve the question but the force applied will be canceled out, and eventually the reaction...
relevant equations:
My questions:
(1)Not sure whether I did correct especially for the deflection angle
(2)The limit taken for calculating defection Yc , I didn't understand why is from 0 to L/2 instead of the sum of 0 to L/2 and 0 to L, how is the limit determined?
Kindly advise, thanks
but also the Tension of AB and BC will not longer the same right? I saw another explanation that the Tension BC is assumed as 0 since the cable slacks so the W will have a clockwise moment which cause it to return equilibrium