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Año de la consolidación del Mar de Grau
ALUMNO : GIRON ZETA, Cesar
DOCENTE : Ing. Carlos Silva Castillo
TEMA : ARMADURAS
FACULTAD : INGENIERIA CIVIL
Piura – Perú
2016
TRABAJO ENCARGADO ANALISIS ESTRUCURAL
P 4.6 Determine las fuerzas en todas las barras de las armaduras.
Indique si se encuentran a tensión o compresión:
Pendiente de 𝟔𝟎 𝒐
∑ 𝑴 𝑨 = 𝟎
15 × 24 + 45 × 12 = 30 × 𝑅 𝐹
360 + 540 = 30𝑅 𝐹
900 = 30𝑅 𝐹
𝑅 𝐹 = 30 𝐾𝑙𝑏
∑ 𝑭 𝒀 = 𝟎
𝑅 𝐴𝑌 + 𝑅 𝐹 = 24 + 12
𝑅 𝐴𝑌 + 30 = 36
𝑅 𝐴𝑌 = 6 𝐾𝑙𝑏
∑ 𝐹𝑥 = 0
𝑅 𝐴𝑋 = 0
NODO “A”
∑ 𝐹𝑦 = 0
𝐹𝐵𝐴 sin 60 = 6
𝐹𝐵𝐴 × (
√3
2
) = 6
𝐹𝐵𝐴 = 4√3 𝐾𝑙𝑏
∑ 𝐹𝑥 = 0
𝐹𝐵𝐴 × cos 60 = 𝐹𝐴𝐺
4√3 × (
1
2
) = 𝐹𝐴𝐺
𝐹𝐴𝐺 = 2√3 𝐾𝑙𝑏
NODO “B”
∑ 𝐹𝑦 = 0
𝐹𝐴𝐵 × sin 60 = 𝐹𝐵𝐺 × sin 60
𝐹𝐵𝐺 = 4√3 𝐾𝑙𝑏
600
𝐹𝐵𝐴
𝐹𝐴𝐺
𝐹𝐶𝐵
𝐹𝐵𝐺
𝐹𝐴𝐵
∑ 𝐹𝑥 = 0
𝐹𝐶𝐵 = 𝐹𝐵𝐺 × cos 60 + 𝐹𝐴𝐵 × cos 60
𝐹𝐶𝐵 = 4√3 × (
1
2
) + 4√3 × (
1
2
)
𝐹𝐶𝐵 = 4√3 𝐾𝑙𝑏
NODO “G”
∑ 𝐹𝑦 = 0
𝐹𝐺𝐵 × sin 60 + 𝐹𝐺𝑐 × sin 60 = 24
4√3 × (
√3
2
) + 𝐹𝐺𝐶 ×
√3
2
= 24
𝐹𝐺𝐶 ×
√3
2
= 18
𝐹𝐺𝐶 = 12√3 𝐾𝑙𝑏
∑ 𝐹𝑥 = 0
𝐹𝐹𝐺 + 𝐹𝐺𝐴 + 𝐹𝐺𝐵 × cos 60 = 𝐹𝐺𝐶 × cos 60
𝐹𝐹𝐺 + 2√3 + 4√3 × (
1
2
) = 12√3 × (
1
2
)
𝐹𝐹𝐺 + 4√3 = 6√3
𝐹𝐹𝐺 = 2√3 𝐾𝑙𝑏
𝐹𝐺𝐶𝐹𝐺𝐵
𝐹𝐹𝐺
𝐹𝐶𝐴
24
NODO “C”
∑ 𝐹𝑦 = 0
𝐹𝐶𝐺 × sin 60 = 𝐹𝐶𝐹 × sin 60
𝐹𝐶𝐹 = 12√3 𝐾𝑙𝑏
∑ 𝐹𝑥 = 0
𝐹𝐶𝐹 × cos 60 + 𝐹𝐶𝐺 × cos 60 = 𝐹𝐵𝐶 + 𝐹𝐶𝐷
12√3 ×
1
2
+ 12√3 ×
1
2
= 4√3 + 𝐹𝐷𝐶
𝐹𝐶𝐷 + 4√3 = 12√3
𝐹𝐶𝐷 = 8√3 𝐾𝑙𝑏
NODO “F”
𝐹𝐷𝐶𝐹𝐺𝐶
𝐹𝐶𝐹𝐹𝐶𝐺
𝐹𝐷𝐹
𝐹𝐸𝐹
𝐹𝐶𝐹
30 𝑘𝑙𝑏
𝐹𝐺𝐹
∑ 𝐹𝑦 = 0
𝐹𝐷𝐹 × sin 60 + 𝐹𝐶𝐹 × sin 60 = 30
𝐹𝐷𝐹 ×
√3
2
+ 12√3 ×
√3
2
= 30
𝐹𝐷𝐹 ×
√3
2
= 12
𝐹𝐷𝐹 = 8√3 𝐾𝑙𝑏
∑ 𝐹𝑥 = 0
𝐹𝐸𝐹 + 𝐹𝐷𝐹 × cos 60 = 𝐹𝐶𝐹 × cos 60 + 𝐹𝐺𝐹
𝐹𝐸𝐹 + 8√3 ×
1
2
= 12√3 ×
1
2
+ 2√3
𝐹𝐸𝐹 = 4√3 𝐾𝑙𝑏
NODO “D”
∑ 𝐹𝑦 = 0
𝐹𝐹𝐷 × sin 60 = 𝐹𝐷𝐸 × sin 60
𝐹𝐷𝐸 = 𝐹𝐹𝐷
𝐹𝐷𝐸 = 8√3 𝐾𝑙𝑏
∑ 𝐹𝑥 = 0
𝐹𝐹𝐷 × cos 60 + 𝐹𝐷𝐸 × cos 60 = 𝐹𝐷𝐶
8√3 ×
1
2
+ 8√3 ×
1
2
= 8√3 … … √√
𝐹𝐷𝐶
𝐹𝐷𝐸
𝐹𝐹𝐷
NODO “E”
∑ 𝐹𝑦 = 0
𝐹𝐸𝐷 × sin 60 = 12 ... √√
8√3 ×
√3
2
= 12 … . . √√
∑ 𝐹𝑥 = 0
𝐹𝐸𝐷 × cos 60 = 𝐹𝐹𝐸 √√
8√3 × cos 60 = 4√3 √√
𝐹𝐸𝐷
12 𝑘𝑙𝑏
𝐹𝐹𝐸
P4.7 Determine las fuerzas en todas las barras de las armaduras. Indique
si se encuentran a tensión o compresión:
∑ 𝑀𝐴 = 0
4 × 9 + 8 × 12 = 6𝑅 𝐸𝑌
6𝑅 𝐸𝑌 = 132
𝑅 𝐸𝑌 = 22 𝑘𝑁
∑ 𝐹𝑦 = 0
𝑅 𝐸𝑌 = 𝑅 𝐴𝑌
𝑅 𝐴𝑌 = 22 𝑘𝑁
∑ 𝐹𝑥 = 0
𝐹𝐴𝑋 + 𝐹𝐸𝑋 = 12 + 9
𝐹𝐴𝑋 + 𝐹𝐸𝑋 = 21 𝑘𝑁
Análisis del nodo “C”
∑ 𝐹𝑥 = 0
𝐹𝐷𝐶 × sin 37 = 12
𝐹𝐷𝐶 ×
3
5
= 12
𝐹𝐷𝐶 = 20 𝑘𝑁
∑ 𝐹𝑦 = 0
𝐹𝐷𝐶 × cos 37 = 𝐹𝐶𝐵
𝐹𝐶𝐵 = 20 ×
4
5
𝐹𝐶𝐵 = 16 𝑘𝑁
Análisis nodo “B”
12 𝑘𝑁
𝐹𝐶𝐵
𝐹𝐷𝐶
𝐹𝐵𝐶
𝐹𝐷𝐵9𝑘𝑁
𝐹𝐵𝐴
∑ 𝐹𝑥 = 0
𝐹𝐷𝐵 = 9 𝑘𝑁
∑ 𝐹𝑦 = 0
𝐹𝐵𝐶 = 𝐹𝐵𝐴
𝐹𝐵𝐴 = 16 𝑘𝑁
Análisis del nodo “A”
∑ 𝐹𝑦 = 0
𝐹𝐴𝐷 × cos 37 + 𝐹𝐴𝐵 = 22 𝑘𝑁
𝐹𝐴𝐷 ×
4
5
+ 16 = 22
𝐹𝐴𝐷 = 7.5 𝑘𝑁
∑ 𝐹𝑋 = 0
𝐹𝐴𝑋 = 𝐹𝐴𝐷 × cos 53
𝐹𝐴𝑋 = 7.5 ×
3
5
𝐹𝐴𝑋 = 4.5 𝑘𝑁
𝐹𝐴𝐵
𝐹𝐴𝐷
22𝑘𝑁
𝐹𝐴𝑋
Análisis del nodo “D”
∑ 𝐹𝑦 = 0
𝐹𝐶𝐷 × sin 53 + 𝐹𝐷𝐴 × cos 37 = 𝐹𝐸𝐷 × cos 37
𝐹𝐸𝐷 = 𝐹𝐶𝐷 + 𝐹𝐷𝐴
𝐹𝐸𝐷 = 20 + 7.5
𝐹𝐸𝐷 = 27.5 𝑘𝑁
∑ 𝐹𝑋 = 0
𝐹𝐶𝐷 × cos 53 + 𝐹𝐵𝐷 = 𝐹𝐷𝐴 × cos 53 + 𝐹𝐸𝐷 × cos 53
20 ×
3
5
+ 9 = 27.5 ×
3
5
+ 7.5 ×
3
5
12 + 9 = 16.5 + 4.5
21 = 21 … . √
Analisis del nudo “E”
𝐹𝐷𝐸
22𝑘𝑁
𝐹𝐸𝑋
𝐹𝐶𝐷
𝐹𝐵𝐷
𝐹𝐷𝐴
𝐹𝐸𝐷
∑ 𝐹𝑌 = 0
𝐹𝐷𝐸 × sin 53 = 𝐹𝐸𝑌
27.5 ×
4
5
= 22 … . √
∑ 𝐹𝑥 = 0
𝐹𝐷𝐸 × cos 53 = 𝐹𝐸𝑋
𝐹𝐸𝑋 = 27.5 ×
3
5
𝐹𝐸𝑋 = 16.5 𝑘𝑁
P 4.8 Determine las fuerzas en todas las barras de las armaduras. Indique
si se encuentran a tensión o compresión:
∑ 𝑀𝐴 = 0
12𝑅 𝐵 = 16 × 12 + 24 × 24
𝑅 𝐵 = 64 𝑘𝑙𝑏
∑ 𝐹𝑌 = 0
𝑅 𝐴𝑌 + 24 = 𝑅 𝐵
𝑅 𝐴𝑌 + 24 = 64
𝑅 𝐴𝑌 = 40 𝑘𝑙𝑏
∑ 𝐹𝑋 = 0
𝑅 𝐴𝑋 = 12 𝑘𝑙𝑏
Análisis del nodo “A”
∑ 𝐹𝑌 = 0
𝐹𝐵𝐴 × sin 53 = 40
𝐹𝐵𝐴 ×
4
5
= 40
𝐹𝐵𝐴 = 50 𝑘𝑙𝑏
∑ 𝐹𝑋 = 0
𝐹𝐴𝐸 = 𝐹𝐵𝐴 × cos 53 + 12
𝐹𝐴𝐸 = 50 ×
3
5
+ 12
𝐹𝐴𝐸 = 42 𝑘𝑙𝑏
Análisis del nodo “B”
64 𝑘𝑙𝑏
𝐹𝐴𝐸
𝐹𝐵𝐴
12 𝑘𝑙𝑏
40 𝑘𝑙𝑏
𝐹𝐴𝐵
𝐹𝐷𝐸
𝐹𝐶𝐵
∑ 𝐹𝑥 = 0
𝐹𝐴𝐵 × sin 37 = 𝐹𝐶𝐴 × sin 37
𝐹𝐴𝐵 = 𝐹𝐶𝐴
𝐹𝐶𝐴 = 50 𝑘𝑙𝑏
∑ 𝐹𝑦 = 0
𝐹𝐴𝐵 × cos 37 + 𝐹𝐶𝐴 × cos 37 = 𝐹𝐵𝐸 + 64
𝐹𝐵𝐸 + 64 = 50 ×
4
5
+ 50 ×
4
5
𝐹𝐵𝐸 + 64 = 80
𝐹𝐵𝐸 = 16 𝑘𝑙𝑏
Análisis nodo “E”
∑ 𝐹𝑥 = 0
𝐹𝐸𝐴 = 𝐹𝐸𝐶
𝐹𝐸𝐶 = 42 𝑘𝑙𝑏
∑ 𝐹𝑌 = 0
𝐹𝐸𝐵 = 𝐹𝐸𝐷
𝐹𝐸𝐷 = 16 𝑘𝑙𝑏
𝐹𝐸𝐷
𝐹𝐸𝐶𝐹𝐸𝐴
𝐹𝐸𝐵
Análisis del nodo “C”
∑ 𝐹𝑦 = 0
𝐹𝐷𝐶 × sin 53 + 24 = 𝐹𝐵𝐶 × sin 53
𝐹𝐷𝐶 ×
4
5
+ 24 = 50 ×
4
5
𝐹𝐷𝐶 = 20 𝑘𝑙𝑏
∑ 𝐹𝑥 = 0
𝐹𝐷𝐶 × sin 53 + 24 = 𝐹𝐵𝐶 × sin 53
20 ×
4
5
+ 24 = 50 ×
4
5
40 = 40 … … √
𝐹𝐷𝐶
𝐹𝐸𝐶
𝐹𝐵𝐶
24 𝑘𝑙𝑏
Análisis del nodo “D”
∑ 𝐹𝑋 = 0
𝐹𝐶𝐷 × sin 37 = 12
20 ×
3
5
= 12
12 = 12 … … . √
∑ 𝐹𝑌 = 0
𝐹𝐶𝐷 × cos 37 = 16
20 ×
4
5
= 16
16 = 16 … … √
12 𝑘𝑙𝑏
𝐹𝐷𝐸
𝐹𝐶𝐷
P4.9 Determine las fuerzas en todas las barras de las armaduras. Indique
si se encuentran a tensión o compresión:
∑ 𝑀𝐴 = 0
16 × 36 + 12 × 24 + 24 × 8 = 32𝑅 𝐵
32𝑅 𝐵 = 1056
𝑅 𝐵 = 33 𝐾𝑙𝑏
∑ 𝐹𝑌 = 0
𝑅 𝐴 + 𝑅 𝐵 = 36
𝑅 𝐴 + 33 = 36
𝑅 𝐴 = 3 𝑘𝑙𝑏
∑ 𝐹𝑋 = 0
𝑅 𝐴𝑋 = 8 + 24
𝑅 𝐴𝑋 = 32 𝑘𝑙𝑏
Análisis del nodo “C”
tan−1
(
16
24
) = 33.690
𝜃 = 33.690
∑ 𝐹𝑌 = 0
𝐹𝐸𝐶 × cos 53 = 𝐹𝐶𝐴 cos 33.69
𝐹𝐸𝐶 =
5
3
× cos 33.69 × 𝐹𝐶𝐴
𝐹𝐸𝐶 = 1.3868𝐹𝐶𝐴
∑ 𝐹𝑋 = 0
𝐹𝐸𝐶 × sin 53 + 𝐹𝐶𝐴 × sin 33.69 = 8
1.3868 × sin 53 × 𝐹𝐶𝐴 + sin 33.69 × 𝐹𝐶𝐴 = 8
1.662𝐹𝐶𝐴 = 8
𝐹𝐶𝐴 = 4.81 𝑘𝑙𝑏
𝐹𝐸𝐶 = 1.3868𝐹𝐶𝐴
𝐹𝐶𝐸 = 6.671
8 𝑘𝑙𝑏
𝐹𝐶𝐴
𝐹𝐶𝐸
Análisis del nodo “A”
∑ 𝐹𝑌 = 0
𝐹𝐴𝐶 × sin 56.31 + 3 = 𝐹𝐷𝐴 × sin 37
4.81 × sin 56.31 + 3 = 𝐹𝐷𝐴 × sin 37
𝐹𝐷𝐴 ×
3
5
= 7.0022
𝐹𝐷𝐴 = 11.67 𝑘𝑙𝑏
∑ 𝐹𝑋 = 0
𝐹𝐴𝐵 + 𝐹𝐴𝐶 × cos 56.31 = 𝐹𝐷𝐴 × cos 37 + 32
𝐹𝐴𝐵 + 4.81 × 0.555 = 9.336 +32
𝐹𝐴𝐵 = 38.66645
𝐹𝐴𝐵 = 38.67 𝑘𝑙𝑏
Análisis del nodo “D”
𝐹𝐴𝐵
𝐹𝐴𝐶 𝐹𝐷𝐴
32 𝑘𝑙𝑏
3 𝑘𝑙𝑏
𝐹𝐷𝐸
𝐹𝐵𝐷𝐹𝐴𝐷 36 𝑘𝑙𝑏
∑ 𝐹𝑌 = 0
𝐹𝐵𝐷 × sin 37 + 𝐹𝐴𝐷 × cos 53 = 36
𝐹𝐵𝐷 × sin 37 + 11.67 ×
3
5
= 36
3
5
𝐹𝐵𝐷 = 28.998
𝐹𝐵𝐷 = 48.33 𝑘𝑙𝑏
∑ 𝐹𝑋 = 0
𝐹𝐴𝐷 × sin 53 + 𝐹𝐷𝐸 = 𝐹𝐵𝐷 × cos 37
11.67 ×
4
5
+ 𝐹𝐷𝐸 = 48.33 ×
4
5
𝐹𝐷𝐸 = 29.328
𝐹𝐷𝐸 = 29.33 𝑘𝑙𝑏
Análisis del nodo “E”
∑ 𝐹𝑋 = 0
𝐹𝐶𝐸 × cos 37 + 24 = 𝐹𝐸𝐷
6.67 ×
4
5
+ 24 = 29.33
29.33 = 29.33 … . . √
𝐹𝐶𝐸
𝐹𝐸𝐷 24 𝑘𝑙𝑏
𝐹𝐵𝐸
∑ 𝐹𝑌 = 0
𝐹𝐶𝐸 × sin 37 = 𝐹𝐵𝐸
𝐹𝐵𝐸 = 6.67 ×
3
5
𝐹𝐵𝐸 = 4.002
𝐹𝐵𝐸 = 4 𝑘𝑙𝑏
Análisis del nodo “B”
∑ 𝐹𝑋 = 0
𝐹𝐵𝐴 = 𝐹𝐷𝐵 × cos 37
∑ 𝐹𝑌 = 0
𝐹𝐷𝐵 × sin 37 + 𝐹𝐸𝐵 = 33
𝐹𝐸𝐵
𝐹𝐷𝐵
𝐹𝐵𝐴
33 𝑘𝑙𝑏
P4.10 Determine las fuerzas en todas las barras de las armaduras. Indique
si se encuentran a tensión o compresión:
∑ 𝑀 𝐷 = 0
4𝑅 𝐶 = 12 × 30 + 8 × 60
4𝑅 𝐶 = 840
𝑅 𝐶 = 210 𝑘𝑁
∑ 𝐹𝑌 = 0
𝑅 𝐷 + 60 + 30 = 210
𝑅 𝐷 = 120 𝑘𝑁
Análisis del nodo “A”
𝐹𝐴𝐵
𝐹𝐵𝐴
30 𝑘𝑁
∑ 𝐹𝑌 = 0
𝐹𝐴𝐹 × sin 37 = 30
𝐹𝐴𝐹 ×
3
5
= 30
𝐹𝐴𝐹 = 50 𝑘𝑁
∑ 𝐹𝑋 = 0
𝐹𝐵𝐴 = 𝐹𝐴𝐹 × cos 37
𝐹𝐵𝐴 = 50 ×
4
5
𝐹𝐵𝐴 = 40 𝑘𝑁
Análisis del nodo “F”
∑ 𝐹𝑥 = 0
𝐹𝐹𝐸 × cos 14.03 = 𝐹𝐹𝐴 × sin 53
𝐹𝐹𝐸 × cos 14.03 = 50 ×
4
5
𝐹𝐹𝐸 × cos 14.03 = 40
𝐹𝐹𝐸 = 41.2299
𝐹𝐹𝐸 = 41.23 𝑘𝑁
𝐹𝐹𝐸
𝐹𝐹𝐴
𝐹𝐵𝐹
∑ 𝐹𝑌 = 0
𝐹𝐵𝐹 + 𝐹𝐸𝐹 × sin 14.04 = 𝐹𝐹𝐴 × cos 53
𝐹𝐵𝐹 + 41.23 × sin 14.04 = 50 ×
3
5
𝐹𝐵𝐹 = 30 − 10.0024
𝐹𝐵𝐹 = 19.9976
𝐹𝐵𝐹 = 20 𝑘𝑁
Análisis del nodo “B”
∑ 𝐹𝑌 = 0
𝐹𝐵𝐸 × cos 45 = 𝐹𝐹𝐵 + 60
𝐹𝐵𝐸 ×
√2
2
= 20 + 60
𝐹𝐵𝐸 = 113.1371
𝐹𝐵𝐸 = 113.14 𝑘𝑁
∑ 𝐹𝑋 = 0
𝐹𝐶𝐵 = 𝐹𝐵𝐸 × cos 45 + 𝐹𝐵𝐶
𝐹𝐶𝐵 = 113.14 ×
√2
2
+ 40
𝐹𝐶𝐵 = 120.00 𝑘𝑁
𝐹𝐹𝐵
𝐹𝐵𝐸
𝐹𝐴𝐵 𝐹𝐶𝐵
60 𝑘𝑁
Análisis del nodo “C”
∑ 𝐹𝑋 = 0
𝐹𝐷𝐶 × cos 26.56 = 𝐹𝐵𝐶
𝐹𝐷𝐶 × cos 26.56 = 120
𝐹𝐷𝐶 = 134.1581
𝐹𝐷𝐶 = 134.16 𝑘𝑁
∑ 𝐹𝑌 = 0
𝐹𝐷𝐶 × sin 26.56 + 𝐹𝐸𝐶 = 210
134.16 × 0.447 + 𝐹𝐸𝐶 = 210
𝐹𝐸𝐶 = 150.030
𝐹𝐸𝐶 = 150 𝑘𝑁
𝐹𝐵𝐶
𝐹𝐸𝐶
𝐹𝐷𝐶
210 𝑘𝑁
Análisis del nodo “D”
∑ 𝐹𝑌 = 0
𝐹𝐷𝐸 × sin 26.56 + 𝐹𝐶𝐷 × sin 26.56 = 120
𝐹𝐷𝐸 × sin 26.56 + 134.16 × sin 26.56 = 120
𝐹𝐷𝐸 = 134.215
Análisis nodo “E”
∑ 𝐹𝑥 = 0
∑ 𝐹𝑌 = 0
𝐹𝐷𝐸
𝐹𝐶𝐷 120 𝑘𝑁
𝐹𝐸𝐹
𝐹𝐶𝐵𝐹𝐸𝐵
𝐹𝐸𝐷
SOLUCION DE LOS EJERCICION MEDIANTE EL PROGRAMA
MDSolids
P4.6
P4.7
P4.8
P4.9
P4.10

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Armaduras

  • 1. Año de la consolidación del Mar de Grau ALUMNO : GIRON ZETA, Cesar DOCENTE : Ing. Carlos Silva Castillo TEMA : ARMADURAS FACULTAD : INGENIERIA CIVIL Piura – Perú 2016
  • 2. TRABAJO ENCARGADO ANALISIS ESTRUCURAL P 4.6 Determine las fuerzas en todas las barras de las armaduras. Indique si se encuentran a tensión o compresión: Pendiente de 𝟔𝟎 𝒐 ∑ 𝑴 𝑨 = 𝟎 15 × 24 + 45 × 12 = 30 × 𝑅 𝐹 360 + 540 = 30𝑅 𝐹 900 = 30𝑅 𝐹 𝑅 𝐹 = 30 𝐾𝑙𝑏 ∑ 𝑭 𝒀 = 𝟎 𝑅 𝐴𝑌 + 𝑅 𝐹 = 24 + 12 𝑅 𝐴𝑌 + 30 = 36 𝑅 𝐴𝑌 = 6 𝐾𝑙𝑏 ∑ 𝐹𝑥 = 0 𝑅 𝐴𝑋 = 0
  • 3. NODO “A” ∑ 𝐹𝑦 = 0 𝐹𝐵𝐴 sin 60 = 6 𝐹𝐵𝐴 × ( √3 2 ) = 6 𝐹𝐵𝐴 = 4√3 𝐾𝑙𝑏 ∑ 𝐹𝑥 = 0 𝐹𝐵𝐴 × cos 60 = 𝐹𝐴𝐺 4√3 × ( 1 2 ) = 𝐹𝐴𝐺 𝐹𝐴𝐺 = 2√3 𝐾𝑙𝑏 NODO “B” ∑ 𝐹𝑦 = 0 𝐹𝐴𝐵 × sin 60 = 𝐹𝐵𝐺 × sin 60 𝐹𝐵𝐺 = 4√3 𝐾𝑙𝑏 600 𝐹𝐵𝐴 𝐹𝐴𝐺 𝐹𝐶𝐵 𝐹𝐵𝐺 𝐹𝐴𝐵
  • 4. ∑ 𝐹𝑥 = 0 𝐹𝐶𝐵 = 𝐹𝐵𝐺 × cos 60 + 𝐹𝐴𝐵 × cos 60 𝐹𝐶𝐵 = 4√3 × ( 1 2 ) + 4√3 × ( 1 2 ) 𝐹𝐶𝐵 = 4√3 𝐾𝑙𝑏 NODO “G” ∑ 𝐹𝑦 = 0 𝐹𝐺𝐵 × sin 60 + 𝐹𝐺𝑐 × sin 60 = 24 4√3 × ( √3 2 ) + 𝐹𝐺𝐶 × √3 2 = 24 𝐹𝐺𝐶 × √3 2 = 18 𝐹𝐺𝐶 = 12√3 𝐾𝑙𝑏 ∑ 𝐹𝑥 = 0 𝐹𝐹𝐺 + 𝐹𝐺𝐴 + 𝐹𝐺𝐵 × cos 60 = 𝐹𝐺𝐶 × cos 60 𝐹𝐹𝐺 + 2√3 + 4√3 × ( 1 2 ) = 12√3 × ( 1 2 ) 𝐹𝐹𝐺 + 4√3 = 6√3 𝐹𝐹𝐺 = 2√3 𝐾𝑙𝑏 𝐹𝐺𝐶𝐹𝐺𝐵 𝐹𝐹𝐺 𝐹𝐶𝐴 24
  • 5. NODO “C” ∑ 𝐹𝑦 = 0 𝐹𝐶𝐺 × sin 60 = 𝐹𝐶𝐹 × sin 60 𝐹𝐶𝐹 = 12√3 𝐾𝑙𝑏 ∑ 𝐹𝑥 = 0 𝐹𝐶𝐹 × cos 60 + 𝐹𝐶𝐺 × cos 60 = 𝐹𝐵𝐶 + 𝐹𝐶𝐷 12√3 × 1 2 + 12√3 × 1 2 = 4√3 + 𝐹𝐷𝐶 𝐹𝐶𝐷 + 4√3 = 12√3 𝐹𝐶𝐷 = 8√3 𝐾𝑙𝑏 NODO “F” 𝐹𝐷𝐶𝐹𝐺𝐶 𝐹𝐶𝐹𝐹𝐶𝐺 𝐹𝐷𝐹 𝐹𝐸𝐹 𝐹𝐶𝐹 30 𝑘𝑙𝑏 𝐹𝐺𝐹
  • 6. ∑ 𝐹𝑦 = 0 𝐹𝐷𝐹 × sin 60 + 𝐹𝐶𝐹 × sin 60 = 30 𝐹𝐷𝐹 × √3 2 + 12√3 × √3 2 = 30 𝐹𝐷𝐹 × √3 2 = 12 𝐹𝐷𝐹 = 8√3 𝐾𝑙𝑏 ∑ 𝐹𝑥 = 0 𝐹𝐸𝐹 + 𝐹𝐷𝐹 × cos 60 = 𝐹𝐶𝐹 × cos 60 + 𝐹𝐺𝐹 𝐹𝐸𝐹 + 8√3 × 1 2 = 12√3 × 1 2 + 2√3 𝐹𝐸𝐹 = 4√3 𝐾𝑙𝑏 NODO “D” ∑ 𝐹𝑦 = 0 𝐹𝐹𝐷 × sin 60 = 𝐹𝐷𝐸 × sin 60 𝐹𝐷𝐸 = 𝐹𝐹𝐷 𝐹𝐷𝐸 = 8√3 𝐾𝑙𝑏 ∑ 𝐹𝑥 = 0 𝐹𝐹𝐷 × cos 60 + 𝐹𝐷𝐸 × cos 60 = 𝐹𝐷𝐶 8√3 × 1 2 + 8√3 × 1 2 = 8√3 … … √√ 𝐹𝐷𝐶 𝐹𝐷𝐸 𝐹𝐹𝐷
  • 7. NODO “E” ∑ 𝐹𝑦 = 0 𝐹𝐸𝐷 × sin 60 = 12 ... √√ 8√3 × √3 2 = 12 … . . √√ ∑ 𝐹𝑥 = 0 𝐹𝐸𝐷 × cos 60 = 𝐹𝐹𝐸 √√ 8√3 × cos 60 = 4√3 √√ 𝐹𝐸𝐷 12 𝑘𝑙𝑏 𝐹𝐹𝐸
  • 8. P4.7 Determine las fuerzas en todas las barras de las armaduras. Indique si se encuentran a tensión o compresión: ∑ 𝑀𝐴 = 0 4 × 9 + 8 × 12 = 6𝑅 𝐸𝑌 6𝑅 𝐸𝑌 = 132 𝑅 𝐸𝑌 = 22 𝑘𝑁 ∑ 𝐹𝑦 = 0 𝑅 𝐸𝑌 = 𝑅 𝐴𝑌 𝑅 𝐴𝑌 = 22 𝑘𝑁 ∑ 𝐹𝑥 = 0 𝐹𝐴𝑋 + 𝐹𝐸𝑋 = 12 + 9 𝐹𝐴𝑋 + 𝐹𝐸𝑋 = 21 𝑘𝑁
  • 9. Análisis del nodo “C” ∑ 𝐹𝑥 = 0 𝐹𝐷𝐶 × sin 37 = 12 𝐹𝐷𝐶 × 3 5 = 12 𝐹𝐷𝐶 = 20 𝑘𝑁 ∑ 𝐹𝑦 = 0 𝐹𝐷𝐶 × cos 37 = 𝐹𝐶𝐵 𝐹𝐶𝐵 = 20 × 4 5 𝐹𝐶𝐵 = 16 𝑘𝑁 Análisis nodo “B” 12 𝑘𝑁 𝐹𝐶𝐵 𝐹𝐷𝐶 𝐹𝐵𝐶 𝐹𝐷𝐵9𝑘𝑁 𝐹𝐵𝐴
  • 10. ∑ 𝐹𝑥 = 0 𝐹𝐷𝐵 = 9 𝑘𝑁 ∑ 𝐹𝑦 = 0 𝐹𝐵𝐶 = 𝐹𝐵𝐴 𝐹𝐵𝐴 = 16 𝑘𝑁 Análisis del nodo “A” ∑ 𝐹𝑦 = 0 𝐹𝐴𝐷 × cos 37 + 𝐹𝐴𝐵 = 22 𝑘𝑁 𝐹𝐴𝐷 × 4 5 + 16 = 22 𝐹𝐴𝐷 = 7.5 𝑘𝑁 ∑ 𝐹𝑋 = 0 𝐹𝐴𝑋 = 𝐹𝐴𝐷 × cos 53 𝐹𝐴𝑋 = 7.5 × 3 5 𝐹𝐴𝑋 = 4.5 𝑘𝑁 𝐹𝐴𝐵 𝐹𝐴𝐷 22𝑘𝑁 𝐹𝐴𝑋
  • 11. Análisis del nodo “D” ∑ 𝐹𝑦 = 0 𝐹𝐶𝐷 × sin 53 + 𝐹𝐷𝐴 × cos 37 = 𝐹𝐸𝐷 × cos 37 𝐹𝐸𝐷 = 𝐹𝐶𝐷 + 𝐹𝐷𝐴 𝐹𝐸𝐷 = 20 + 7.5 𝐹𝐸𝐷 = 27.5 𝑘𝑁 ∑ 𝐹𝑋 = 0 𝐹𝐶𝐷 × cos 53 + 𝐹𝐵𝐷 = 𝐹𝐷𝐴 × cos 53 + 𝐹𝐸𝐷 × cos 53 20 × 3 5 + 9 = 27.5 × 3 5 + 7.5 × 3 5 12 + 9 = 16.5 + 4.5 21 = 21 … . √ Analisis del nudo “E” 𝐹𝐷𝐸 22𝑘𝑁 𝐹𝐸𝑋 𝐹𝐶𝐷 𝐹𝐵𝐷 𝐹𝐷𝐴 𝐹𝐸𝐷
  • 12. ∑ 𝐹𝑌 = 0 𝐹𝐷𝐸 × sin 53 = 𝐹𝐸𝑌 27.5 × 4 5 = 22 … . √ ∑ 𝐹𝑥 = 0 𝐹𝐷𝐸 × cos 53 = 𝐹𝐸𝑋 𝐹𝐸𝑋 = 27.5 × 3 5 𝐹𝐸𝑋 = 16.5 𝑘𝑁
  • 13. P 4.8 Determine las fuerzas en todas las barras de las armaduras. Indique si se encuentran a tensión o compresión: ∑ 𝑀𝐴 = 0 12𝑅 𝐵 = 16 × 12 + 24 × 24 𝑅 𝐵 = 64 𝑘𝑙𝑏 ∑ 𝐹𝑌 = 0 𝑅 𝐴𝑌 + 24 = 𝑅 𝐵 𝑅 𝐴𝑌 + 24 = 64 𝑅 𝐴𝑌 = 40 𝑘𝑙𝑏 ∑ 𝐹𝑋 = 0 𝑅 𝐴𝑋 = 12 𝑘𝑙𝑏
  • 14. Análisis del nodo “A” ∑ 𝐹𝑌 = 0 𝐹𝐵𝐴 × sin 53 = 40 𝐹𝐵𝐴 × 4 5 = 40 𝐹𝐵𝐴 = 50 𝑘𝑙𝑏 ∑ 𝐹𝑋 = 0 𝐹𝐴𝐸 = 𝐹𝐵𝐴 × cos 53 + 12 𝐹𝐴𝐸 = 50 × 3 5 + 12 𝐹𝐴𝐸 = 42 𝑘𝑙𝑏 Análisis del nodo “B” 64 𝑘𝑙𝑏 𝐹𝐴𝐸 𝐹𝐵𝐴 12 𝑘𝑙𝑏 40 𝑘𝑙𝑏 𝐹𝐴𝐵 𝐹𝐷𝐸 𝐹𝐶𝐵
  • 15. ∑ 𝐹𝑥 = 0 𝐹𝐴𝐵 × sin 37 = 𝐹𝐶𝐴 × sin 37 𝐹𝐴𝐵 = 𝐹𝐶𝐴 𝐹𝐶𝐴 = 50 𝑘𝑙𝑏 ∑ 𝐹𝑦 = 0 𝐹𝐴𝐵 × cos 37 + 𝐹𝐶𝐴 × cos 37 = 𝐹𝐵𝐸 + 64 𝐹𝐵𝐸 + 64 = 50 × 4 5 + 50 × 4 5 𝐹𝐵𝐸 + 64 = 80 𝐹𝐵𝐸 = 16 𝑘𝑙𝑏 Análisis nodo “E” ∑ 𝐹𝑥 = 0 𝐹𝐸𝐴 = 𝐹𝐸𝐶 𝐹𝐸𝐶 = 42 𝑘𝑙𝑏 ∑ 𝐹𝑌 = 0 𝐹𝐸𝐵 = 𝐹𝐸𝐷 𝐹𝐸𝐷 = 16 𝑘𝑙𝑏 𝐹𝐸𝐷 𝐹𝐸𝐶𝐹𝐸𝐴 𝐹𝐸𝐵
  • 16. Análisis del nodo “C” ∑ 𝐹𝑦 = 0 𝐹𝐷𝐶 × sin 53 + 24 = 𝐹𝐵𝐶 × sin 53 𝐹𝐷𝐶 × 4 5 + 24 = 50 × 4 5 𝐹𝐷𝐶 = 20 𝑘𝑙𝑏 ∑ 𝐹𝑥 = 0 𝐹𝐷𝐶 × sin 53 + 24 = 𝐹𝐵𝐶 × sin 53 20 × 4 5 + 24 = 50 × 4 5 40 = 40 … … √ 𝐹𝐷𝐶 𝐹𝐸𝐶 𝐹𝐵𝐶 24 𝑘𝑙𝑏
  • 17. Análisis del nodo “D” ∑ 𝐹𝑋 = 0 𝐹𝐶𝐷 × sin 37 = 12 20 × 3 5 = 12 12 = 12 … … . √ ∑ 𝐹𝑌 = 0 𝐹𝐶𝐷 × cos 37 = 16 20 × 4 5 = 16 16 = 16 … … √ 12 𝑘𝑙𝑏 𝐹𝐷𝐸 𝐹𝐶𝐷
  • 18. P4.9 Determine las fuerzas en todas las barras de las armaduras. Indique si se encuentran a tensión o compresión: ∑ 𝑀𝐴 = 0 16 × 36 + 12 × 24 + 24 × 8 = 32𝑅 𝐵 32𝑅 𝐵 = 1056 𝑅 𝐵 = 33 𝐾𝑙𝑏 ∑ 𝐹𝑌 = 0 𝑅 𝐴 + 𝑅 𝐵 = 36 𝑅 𝐴 + 33 = 36 𝑅 𝐴 = 3 𝑘𝑙𝑏 ∑ 𝐹𝑋 = 0 𝑅 𝐴𝑋 = 8 + 24 𝑅 𝐴𝑋 = 32 𝑘𝑙𝑏
  • 19. Análisis del nodo “C” tan−1 ( 16 24 ) = 33.690 𝜃 = 33.690 ∑ 𝐹𝑌 = 0 𝐹𝐸𝐶 × cos 53 = 𝐹𝐶𝐴 cos 33.69 𝐹𝐸𝐶 = 5 3 × cos 33.69 × 𝐹𝐶𝐴 𝐹𝐸𝐶 = 1.3868𝐹𝐶𝐴 ∑ 𝐹𝑋 = 0 𝐹𝐸𝐶 × sin 53 + 𝐹𝐶𝐴 × sin 33.69 = 8 1.3868 × sin 53 × 𝐹𝐶𝐴 + sin 33.69 × 𝐹𝐶𝐴 = 8 1.662𝐹𝐶𝐴 = 8 𝐹𝐶𝐴 = 4.81 𝑘𝑙𝑏 𝐹𝐸𝐶 = 1.3868𝐹𝐶𝐴 𝐹𝐶𝐸 = 6.671 8 𝑘𝑙𝑏 𝐹𝐶𝐴 𝐹𝐶𝐸
  • 20. Análisis del nodo “A” ∑ 𝐹𝑌 = 0 𝐹𝐴𝐶 × sin 56.31 + 3 = 𝐹𝐷𝐴 × sin 37 4.81 × sin 56.31 + 3 = 𝐹𝐷𝐴 × sin 37 𝐹𝐷𝐴 × 3 5 = 7.0022 𝐹𝐷𝐴 = 11.67 𝑘𝑙𝑏 ∑ 𝐹𝑋 = 0 𝐹𝐴𝐵 + 𝐹𝐴𝐶 × cos 56.31 = 𝐹𝐷𝐴 × cos 37 + 32 𝐹𝐴𝐵 + 4.81 × 0.555 = 9.336 +32 𝐹𝐴𝐵 = 38.66645 𝐹𝐴𝐵 = 38.67 𝑘𝑙𝑏 Análisis del nodo “D” 𝐹𝐴𝐵 𝐹𝐴𝐶 𝐹𝐷𝐴 32 𝑘𝑙𝑏 3 𝑘𝑙𝑏 𝐹𝐷𝐸 𝐹𝐵𝐷𝐹𝐴𝐷 36 𝑘𝑙𝑏
  • 21. ∑ 𝐹𝑌 = 0 𝐹𝐵𝐷 × sin 37 + 𝐹𝐴𝐷 × cos 53 = 36 𝐹𝐵𝐷 × sin 37 + 11.67 × 3 5 = 36 3 5 𝐹𝐵𝐷 = 28.998 𝐹𝐵𝐷 = 48.33 𝑘𝑙𝑏 ∑ 𝐹𝑋 = 0 𝐹𝐴𝐷 × sin 53 + 𝐹𝐷𝐸 = 𝐹𝐵𝐷 × cos 37 11.67 × 4 5 + 𝐹𝐷𝐸 = 48.33 × 4 5 𝐹𝐷𝐸 = 29.328 𝐹𝐷𝐸 = 29.33 𝑘𝑙𝑏 Análisis del nodo “E” ∑ 𝐹𝑋 = 0 𝐹𝐶𝐸 × cos 37 + 24 = 𝐹𝐸𝐷 6.67 × 4 5 + 24 = 29.33 29.33 = 29.33 … . . √ 𝐹𝐶𝐸 𝐹𝐸𝐷 24 𝑘𝑙𝑏 𝐹𝐵𝐸
  • 22. ∑ 𝐹𝑌 = 0 𝐹𝐶𝐸 × sin 37 = 𝐹𝐵𝐸 𝐹𝐵𝐸 = 6.67 × 3 5 𝐹𝐵𝐸 = 4.002 𝐹𝐵𝐸 = 4 𝑘𝑙𝑏 Análisis del nodo “B” ∑ 𝐹𝑋 = 0 𝐹𝐵𝐴 = 𝐹𝐷𝐵 × cos 37 ∑ 𝐹𝑌 = 0 𝐹𝐷𝐵 × sin 37 + 𝐹𝐸𝐵 = 33 𝐹𝐸𝐵 𝐹𝐷𝐵 𝐹𝐵𝐴 33 𝑘𝑙𝑏
  • 23. P4.10 Determine las fuerzas en todas las barras de las armaduras. Indique si se encuentran a tensión o compresión: ∑ 𝑀 𝐷 = 0 4𝑅 𝐶 = 12 × 30 + 8 × 60 4𝑅 𝐶 = 840 𝑅 𝐶 = 210 𝑘𝑁 ∑ 𝐹𝑌 = 0 𝑅 𝐷 + 60 + 30 = 210 𝑅 𝐷 = 120 𝑘𝑁 Análisis del nodo “A” 𝐹𝐴𝐵 𝐹𝐵𝐴 30 𝑘𝑁
  • 24. ∑ 𝐹𝑌 = 0 𝐹𝐴𝐹 × sin 37 = 30 𝐹𝐴𝐹 × 3 5 = 30 𝐹𝐴𝐹 = 50 𝑘𝑁 ∑ 𝐹𝑋 = 0 𝐹𝐵𝐴 = 𝐹𝐴𝐹 × cos 37 𝐹𝐵𝐴 = 50 × 4 5 𝐹𝐵𝐴 = 40 𝑘𝑁 Análisis del nodo “F” ∑ 𝐹𝑥 = 0 𝐹𝐹𝐸 × cos 14.03 = 𝐹𝐹𝐴 × sin 53 𝐹𝐹𝐸 × cos 14.03 = 50 × 4 5 𝐹𝐹𝐸 × cos 14.03 = 40 𝐹𝐹𝐸 = 41.2299 𝐹𝐹𝐸 = 41.23 𝑘𝑁 𝐹𝐹𝐸 𝐹𝐹𝐴 𝐹𝐵𝐹
  • 25. ∑ 𝐹𝑌 = 0 𝐹𝐵𝐹 + 𝐹𝐸𝐹 × sin 14.04 = 𝐹𝐹𝐴 × cos 53 𝐹𝐵𝐹 + 41.23 × sin 14.04 = 50 × 3 5 𝐹𝐵𝐹 = 30 − 10.0024 𝐹𝐵𝐹 = 19.9976 𝐹𝐵𝐹 = 20 𝑘𝑁 Análisis del nodo “B” ∑ 𝐹𝑌 = 0 𝐹𝐵𝐸 × cos 45 = 𝐹𝐹𝐵 + 60 𝐹𝐵𝐸 × √2 2 = 20 + 60 𝐹𝐵𝐸 = 113.1371 𝐹𝐵𝐸 = 113.14 𝑘𝑁 ∑ 𝐹𝑋 = 0 𝐹𝐶𝐵 = 𝐹𝐵𝐸 × cos 45 + 𝐹𝐵𝐶 𝐹𝐶𝐵 = 113.14 × √2 2 + 40 𝐹𝐶𝐵 = 120.00 𝑘𝑁 𝐹𝐹𝐵 𝐹𝐵𝐸 𝐹𝐴𝐵 𝐹𝐶𝐵 60 𝑘𝑁
  • 26. Análisis del nodo “C” ∑ 𝐹𝑋 = 0 𝐹𝐷𝐶 × cos 26.56 = 𝐹𝐵𝐶 𝐹𝐷𝐶 × cos 26.56 = 120 𝐹𝐷𝐶 = 134.1581 𝐹𝐷𝐶 = 134.16 𝑘𝑁 ∑ 𝐹𝑌 = 0 𝐹𝐷𝐶 × sin 26.56 + 𝐹𝐸𝐶 = 210 134.16 × 0.447 + 𝐹𝐸𝐶 = 210 𝐹𝐸𝐶 = 150.030 𝐹𝐸𝐶 = 150 𝑘𝑁 𝐹𝐵𝐶 𝐹𝐸𝐶 𝐹𝐷𝐶 210 𝑘𝑁
  • 27. Análisis del nodo “D” ∑ 𝐹𝑌 = 0 𝐹𝐷𝐸 × sin 26.56 + 𝐹𝐶𝐷 × sin 26.56 = 120 𝐹𝐷𝐸 × sin 26.56 + 134.16 × sin 26.56 = 120 𝐹𝐷𝐸 = 134.215 Análisis nodo “E” ∑ 𝐹𝑥 = 0 ∑ 𝐹𝑌 = 0 𝐹𝐷𝐸 𝐹𝐶𝐷 120 𝑘𝑁 𝐹𝐸𝐹 𝐹𝐶𝐵𝐹𝐸𝐵 𝐹𝐸𝐷
  • 28. SOLUCION DE LOS EJERCICION MEDIANTE EL PROGRAMA MDSolids P4.6
  • 29. P4.7
  • 30. P4.8
  • 31. P4.9
  • 32. P4.10