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HB<br />
HA<br />
NEA<br />
NC<br />
NCB<br />
Nó “B” Forças Verticais (V) Forças Verticais (H)<br />
VB<br />
NBA<br />
= 0<br />
0<br />
ΣFV = 0 ΣFH = 0<br />
VB-NBA-NBC.sen26,57° = 0 -HB+NBC.cos26,57°<br />
20-NBA-22,36.sen26,57° = 0 -20+NBC.cos26,57° =<br />
NBA = 10 KN NBC = 20÷cos26,57°<br />
NBC = 22,36 KN<br />
Nó “A” Forças Verticais (V) Forças Verticais (H)<br />
NAB<br />
NAB+NAC.sen26,57° = 0<br />
HA+NAC.cos26,57°+NAE = 0<br />
ΣFV = 0 ΣFH = 0<br />
10+NAC.sen26,57° = 0 60+(-<br />
22,36).cos26,57°+NAE = 0<br />
NAC = -10÷sen26,57° NAE+60-20 = 0<br />
NAC = -22,36 KN NAE = -40 KN<br />
Nó “E” Forças Verticais (V) Forças Verticais (H)<br />
NEC<br />
0<br />
NBC<br />
NA<br />
VB<br />
NBA<br />
NAB<br />
NBC<br />
ΣFV = 0 ΣFH = 0<br />
NEC = 0 -NEA+NED =<br />
-(-40)+NED = 0<br />
NED = -40 KN<br />
Nó “C” Forças Verticais (V) Forças Verticais (H)<br />
NC<br />
NAE<br />
NED<br />
40<br />
NEC<br />
NCB<br />
NA<br />
HB<br />
HA<br />
NEA<br />
NCB<br />
NC<br />
NBC<br />
NA<br />
NAE<br />
NED<br />
40<br />
NC<br />
7
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