riguides de barras elementales y metodos de calculo.pdf
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8/18/2019 Riguides de Barras Elementales y Metodos de Calculo.pdf
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Ing. Jorge Luis Paredes Estacio
UNIVERSIDAD PRIVADA ANTENOR ORREGO
FACULTA DE INGENIERIA
ESCUELA PROFESIONAL DE INGENIERIA CIVIL
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Cual es la Diferencia entre Rigidez y
FlexibilidadRigidez: Fuerza o par , que aparece ante un
alargamiento o giro unitario.
Flexibilidad: Alargamiento o giro producidopor una fuerza o par unidad.
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Sistema de Coordenadas
Discretización Sistema de Referencia: Es un Sistema Cartesiano que permite la
definición geométrica de la estructura (coordenadas de los nudos,longitudes de los elementos, etc.)
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Sistema de Coordenadas
Discretización Discretización: Proceso de disociar la estructura en
elementos (unidos en los nodos)
Sistema Local: En cada barra o elemento de la estructura
de finiremos un sistema local, al que referiremos losmovimientos y fuerzas de cada barra.
Sistema Global: Puesto que en el proceso de discretizaciónde la estructura se ha supuesto ésta formada por unconjunto de elementos y nodos, será preciso definir un
sistema único, global, que permita referir a él de formaúnica y para toda la estructura los movimientos y fuerzas delos nodos.
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Rigideces de barras elementales1. Barra de Celosía, estructuras planas (cerchas)
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Rigideces de barras elementales1. Barra de Celosía, estructuras planas (cerchas)
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Rigideces de barras elementales2. Barra en voladizo
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Rigideces de barras elementales2. Barra en voladizo
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Rigideces de barras elementales3. Barra de Estructura Plana Inextensible
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Rigideces de barras elementales3. Barra de Estructura Plana Inextensible
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Rigideces de barras elementales4. Barra de Estructura Plana Extensible
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Rigideces de barras elementales5. Elemento de Pórtico Tridimensional
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Rigideces de barras elementales5. Elemento de Pórtico Tridimensional
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Rigideces de barras elementales6. Elemento Placa
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Rigideces de barras elementales6. Elemento Placa
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Rigideces de barras elementales6. Elemento Placa
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Rigideces de barras elementales6. Elemento Placa
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Matriz de Rigidez Directa – Con
Matrices de Transformación
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Matriz de Rigidez Directa – ConMatrices de Transformación
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Matriz de Rigidez Directa –
Cosenos Directores Formulas:
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Matriz de Rigidez Directa –
Cosenos Directores Formulas:
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PARA ARMADURAS
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MUROS DE ALBAÑILERÍA
a=L/4
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Método de Condensación Estática
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Método de Condensación Estática
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Método de Condensación Estática
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ANÁLISIS MATRICIAL EN 3D
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Hallar los desplazamientos laterales en cada Pórtico debido a las cargasactuantes que actúan en el C.G. de la Losa Rígida. Considerar E=2x10e6ton/m2.Considerar altura de piso a Techo de 3.50m. Hallar el diagrama de momentosen los pórticos debido a las fuerzas.
COLUMNA SECCCIÓN
C-1 0.30x0.50
PRIMER PISO
C-1 C-1
C-1
C-1
C-1
C-1
C-1
C-1
C-1
5 Ton
3.5Ton
8.5 Ton-m
1 2 3
A
B
C
V(0.30x0.60) VP(0.30x0.60)
V(0.30x0.60) V(0.30x0.60)
V(0.30x0.60) V(0.30x0.60)
V ( 0 . 3
0 x 0 . 6
5 )
V
( 0 . 3
0 x 0 . 6
5 )
V ( 0 . 3
0 x 0 . 6
5 )
V
( 0 . 3
0 x 0 . 6
5 )
V ( 0 . 3
0 x 0 . 6
5 )
V
( 0 . 3
0 x 0 . 6
5 )
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ANÁLISIS MATRICIAL EN 3D Ley de Hooke Generalizado
Donde:
Desplazamiento Lateral:
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Caso especial Rigidez lateral