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ENCONTRAR AS REAÇÕES DE APOIO
Os exercícios que se seguem, apresentam estruturas isostática. O número de reações de apoio
será então de no máximo três.
Para determinar as reações de apoio usa-se apenas as três equações de equilíbrio:
∑ Fx = 0
∑ Fy = 0
∑ M = 0
A convenção de sinais utilizada é :
Fy
+sentido positivo
M Fx
A simbologia dos vínculos:
1a Espécie
2a Espécie
3a Espécie
01
10 [KN/m] 12 [ KN / M ].
A B
2,5 m 3,0 m
02
10 [KN / m] 18 [KN].
A B
3,50 m 4,0 m
03
10 KN 8 KN
12 KN / M.
A C
4,0 m 2,5 m B 1,4 m
04
8 [KN / m] 12 [KN].
A B
1,8 m
05
10 [KN]. 14 [KN / m] 18 [KN].
A 15 KNm B
1,5 m 2,20 m 1,5 m 3,0 m
06
10 KNm A B 10 KNm
6,0 m
07
2,5 m 4,5 m
10 [KN / m]
12 KN
B C
4m
4m
15 KN D
2m 14 [KN / m]
A
08 1,5 m
8 [KN / m] 6 KN
B
10 KN/m
3,5m
12 KN 8 KNm
2,5m
A
09
5 m 4 m
C
10 KN
1,5 m
4 m
2,5 m
B D
12KN / m
2m
2m
18 KN E
2m
A
10
6 KN
8 KN 7 KN
5 KN
7 KN
1,50 m
4 KN
A
B
2 m 2 m 2 m 2 m 1,5 m 1,5 m 1,0 m
12 m
RESPOSTAS
EXERCÍCIO Apoio A Apoio B
01
RY = 29,14 KN
RX = KN
M = KNm
RY = 31,86 KN
RX = KN
M = KNm
02 RY = 36,43 KN
RX = KN
M = KNm
RY = 16,57 KN
RX = KN
M = KNm
03 RY = 39,31 KN
RX = KN
M = KNm
RY = 73,49 KN
RX = KN
M = KNm
04 RY = 26,40 KN
RX = KN
M = 34,56 KNm
RY = KN
RX = KN
M = KNm
05 RY = 43,22 KN
RX = KN
M = KNm
RY = 15,58 KN
RX = KN
M = KNm
06 RY = - 0,83 KN
RX = KN
M = KNm
RY = 0,83 KN
RX = KN
M = KNm
07 RY = 13,89 KN
RX = -43 KN
M = KNm
RY = 43,11 KN
RX = KN
M = KNm
08 RY = 18 KN
RX = -47 KN
M = 196,8 KNm
RY = KN
RX = KN
M = KNm
09 RY = 4,64 KN
RX = KN
M = KNm
RY = 3,17 KN
RX = -0,25 KN
M = KNm
10 RY = 9,31 KN
RX = KN
M = KNm
RY = 15,69 KN
RX = 2 KN
M = KNm
RESPOSTAS
EXERCÍCIO Apoio A Apoio B
01
RY = 29,14 KN
RX = KN
M = KNm
RY = 31,86 KN
RX = KN
M = KNm
02 RY = 36,43 KN
RX = KN
M = KNm
RY = 16,57 KN
RX = KN
M = KNm
03 RY = 39,31 KN
RX = KN
M = KNm
RY = 73,49 KN
RX = KN
M = KNm
04 RY = 26,40 KN
RX = KN
M = 34,56 KNm
RY = KN
RX = KN
M = KNm
05 RY = 43,22 KN
RX = KN
M = KNm
RY = 15,58 KN
RX = KN
M = KNm
06 RY = - 0,83 KN
RX = KN
M = KNm
RY = 0,83 KN
RX = KN
M = KNm
07 RY = 13,89 KN
RX = -43 KN
M = KNm
RY = 43,11 KN
RX = KN
M = KNm
08 RY = 18 KN
RX = -47 KN
M = 196,8 KNm
RY = KN
RX = KN
M = KNm
09 RY = 4,64 KN
RX = KN
M = KNm
RY = 3,17 KN
RX = -0,25 KN
M = KNm
10 RY = 9,31 KN
RX = KN
M = KNm
RY = 15,69 KN
RX = 2 KN
M = KNm

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Mecânica das Estruturas

  • 1. ENCONTRAR AS REAÇÕES DE APOIO Os exercícios que se seguem, apresentam estruturas isostática. O número de reações de apoio será então de no máximo três. Para determinar as reações de apoio usa-se apenas as três equações de equilíbrio: ∑ Fx = 0 ∑ Fy = 0 ∑ M = 0 A convenção de sinais utilizada é : Fy +sentido positivo M Fx A simbologia dos vínculos: 1a Espécie 2a Espécie 3a Espécie
  • 2. 01 10 [KN/m] 12 [ KN / M ]. A B 2,5 m 3,0 m 02 10 [KN / m] 18 [KN]. A B 3,50 m 4,0 m 03 10 KN 8 KN 12 KN / M. A C 4,0 m 2,5 m B 1,4 m 04 8 [KN / m] 12 [KN]. A B 1,8 m
  • 3. 05 10 [KN]. 14 [KN / m] 18 [KN]. A 15 KNm B 1,5 m 2,20 m 1,5 m 3,0 m 06 10 KNm A B 10 KNm 6,0 m 07 2,5 m 4,5 m 10 [KN / m] 12 KN B C 4m 4m 15 KN D 2m 14 [KN / m] A
  • 4. 08 1,5 m 8 [KN / m] 6 KN B 10 KN/m 3,5m 12 KN 8 KNm 2,5m A 09 5 m 4 m C 10 KN 1,5 m 4 m 2,5 m B D 12KN / m 2m 2m 18 KN E 2m A
  • 5. 10 6 KN 8 KN 7 KN 5 KN 7 KN 1,50 m 4 KN A B 2 m 2 m 2 m 2 m 1,5 m 1,5 m 1,0 m 12 m
  • 6. RESPOSTAS EXERCÍCIO Apoio A Apoio B 01 RY = 29,14 KN RX = KN M = KNm RY = 31,86 KN RX = KN M = KNm 02 RY = 36,43 KN RX = KN M = KNm RY = 16,57 KN RX = KN M = KNm 03 RY = 39,31 KN RX = KN M = KNm RY = 73,49 KN RX = KN M = KNm 04 RY = 26,40 KN RX = KN M = 34,56 KNm RY = KN RX = KN M = KNm 05 RY = 43,22 KN RX = KN M = KNm RY = 15,58 KN RX = KN M = KNm 06 RY = - 0,83 KN RX = KN M = KNm RY = 0,83 KN RX = KN M = KNm 07 RY = 13,89 KN RX = -43 KN M = KNm RY = 43,11 KN RX = KN M = KNm 08 RY = 18 KN RX = -47 KN M = 196,8 KNm RY = KN RX = KN M = KNm 09 RY = 4,64 KN RX = KN M = KNm RY = 3,17 KN RX = -0,25 KN M = KNm 10 RY = 9,31 KN RX = KN M = KNm RY = 15,69 KN RX = 2 KN M = KNm
  • 7. RESPOSTAS EXERCÍCIO Apoio A Apoio B 01 RY = 29,14 KN RX = KN M = KNm RY = 31,86 KN RX = KN M = KNm 02 RY = 36,43 KN RX = KN M = KNm RY = 16,57 KN RX = KN M = KNm 03 RY = 39,31 KN RX = KN M = KNm RY = 73,49 KN RX = KN M = KNm 04 RY = 26,40 KN RX = KN M = 34,56 KNm RY = KN RX = KN M = KNm 05 RY = 43,22 KN RX = KN M = KNm RY = 15,58 KN RX = KN M = KNm 06 RY = - 0,83 KN RX = KN M = KNm RY = 0,83 KN RX = KN M = KNm 07 RY = 13,89 KN RX = -43 KN M = KNm RY = 43,11 KN RX = KN M = KNm 08 RY = 18 KN RX = -47 KN M = 196,8 KNm RY = KN RX = KN M = KNm 09 RY = 4,64 KN RX = KN M = KNm RY = 3,17 KN RX = -0,25 KN M = KNm 10 RY = 9,31 KN RX = KN M = KNm RY = 15,69 KN RX = 2 KN M = KNm