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 E.T.S. DE ARQUITECTURA / ESTRUCTURAS 1 / PLAN 98 
  	4/SEP/2003 
  EJERCICIO 1  (2.5 puntos)
  
En la estructura de la figura la barra BC se somete a un aumento de temperatura de 20ºC. Calcular las reacciones y dibujar las leyes de esfuerzos.
 En ambas barras:
 E = 105 MPa
 I = 105 cm4
 A = 103 cm2
 ð = 10-4 ºC-1
 
 EJERCICIO 2  (1.5 puntos)
  Dibujar a estima los diagramas de esfuerzos y las deformadas de las siguientes vigas.
 
    Tiempo: 1 hora y 15 minutos 
 E.T.S. DE ARQUITECTURA / ESTRUCTURAS 1 / PLAN 98 
  	4/SEP/2003 
  EJERCICIO 3  (2.0 puntos)
  Dada la viga de la figura, se pide calcular el máximo valor que pueden alcanzar las cargas P. No hay limitación de flecha. La viga es de madera con las siguientes tensiones admisibles:
 σadm-c = 8 MPa 
 σadm-t = 10 MPa 
 ðadm = 2 MPa 
  Nota: Ix = 165.000 cm4
  EJERCICIO 4  (1.5 puntos)
  En una cubierta las correas se dimensionan con IPE80. Se pide calcular la σmáx que se produce.
 Datos del IPE80:
 Ix = 80.1 cm4
 Iy = 8.49 cm4
 h = 8 cm
 b = 4.6 cm
  Tiempo: 1 hora y 15 minutos 
 E.T.S. DE ARQUITECTURA / ESTRUCTURAS 1 / PLAN 98 
  	4/SEP/2003 
  EJERCICIO 5  (2.5 puntos)
  El pilar AB del pórtico de la figura está formado por 2 UPN100 empresillados, con el eje XX en el plano del pórtico. En el plano perpendicular al pórtico el pilar se encuentra articulado en B y empotrado en A. En el plano del pórtico la viga transmite la carga al pilar con una excentricidad de 5 cm. Se pide comprobar si el pilar dimensionado es válido, según las prescripciones de NBE EA-95.
  Coeficiente de ponderación de acciones 1.5
 Acero A42b
   
     Tiempo: 1 hora 
 
 
 
 
 
 
                                
 
      
			
			    
			
				      
			
			    
			
				      
				      
              
            
                
              
            
      
      
				
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        Enviado por: Javier López Ruiz Idioma:   castellanoPaís:  España