12.05.2013 Views

Apostila de Treliças 2

Apostila de Treliças 2

Apostila de Treliças 2

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

173.sen22,62°-130.sen22,62°-50-(-52).sen39,81°=0 -130.cos22,62°+NBC.cos22,62°+(-<br />

52).cos39,81°=0<br />

NCB<br />

= 0<br />

66,5-50-50+33,5=0 NBC.cos22,62°-120-40<br />

0=0 NBC = 160÷cos22,62°<br />

NBC = 173 KN<br />

Nó “C” Forças Verticais (V) Forças Verticais (H)<br />

VC<br />

HC<br />

VC<br />

NCF NCB NCF<br />

NCB<br />

ΣFV= 0 ΣFH = 0<br />

VC-NCF-NCB.sen22,62°=0 -NCB.cos22,62°+HC = 0<br />

100-(+33,3)-(+173).sen22,62°=0 -(+173).c os22,62°+160 = 0<br />

100-33,3-66,7=0 -160+160 = 0<br />

0=0 0 = 0<br />

HC<br />

BARRA<br />

FORÇAS NORMAIS<br />

AXIAIS (KN)<br />

ESFORÇO<br />

NDA 100 TRAÇÃO<br />

NDE 0 -<br />

NAE -130 COMPRESSÃO<br />

NAB 130 TRAÇÃO<br />

NEB 50 TRAÇÃO<br />

NEF -120 COMPRESSÃO<br />

NFC 33,3 TRAÇÃO<br />

NFB -52 COMPRESSÃO<br />

NBC 173 TRAÇÃO<br />

40

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!