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4-portal-dan-pelengkung-tiga-sendi

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Y<br />

P Pada potongan yang ditinjau terdapat<br />

N<br />

gaya-gaya dalam: N, V, M<br />

M Gaya N <strong>dan</strong> V diuraikan menjadi<br />

komponen masing-masing :<br />

V<br />

R N N 1<br />

x <strong>dan</strong> N y<br />

A<br />

V V<br />

R x <strong>dan</strong> V y<br />

1<br />

R AH<br />

R AV<br />

X<br />

Selanjutnya dapat dihitung N, V <strong>dan</strong> M<br />

dengan persamaan keseimbangan :<br />

F x = 0<br />

F y = 0<br />

M = 0

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