truss - find internal force in each member


by jhox08
Tags: force, internal, member, truss
jhox08
jhox08 is offline
#1
Nov18-10, 03:34 PM
P: 8
1. The problem statement, all variables and given/known data

please see the image, I am supposed to find the internal force in each member of the truss and state if its in compression or tension


2. Relevant equations



3. The attempt at a solution
here is what I have so far (all in kN)....
My=40 up
Gy=80 up
Mx=0
from joint G
Tga=100 in compression
Tgh=60 in tension
from joint A
Tah=90 in compression
Tab=80 in tension
from joint H
Thb=162.5 in tension
Thj=157.5 in compression
from joint J
Tjb=20 in tension
Tjk=157.5 in tension
from joint B
Tbk=162.5 in tension
Tbc=80 in compression
from joint K
Tkl=255 in compression

I stopped here, I feel I've done something wrong, can someone let me know if I'm doing something wrong.....thanks
Attached Thumbnails
ce2pic.jpg  
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