06 febrero, 2008

[APRENDA] ¿COLUMNA CORTA?

Gracias a>>> Obra Civil - http://construarte.blogspot.com/
“La configuración y disposición de elementos estructurales afectan el comportamiento sísmico”
Vea este esquema:

Se trata de dos columnas, una corta y otra larga, ambas con la misma sección, y soportan una placa.Suponga que actúa una fuerza horizontal.
¿Cuál de las dos columnas toma la mayor carga de la fuerza aplicada?

[Respuesta]: La columna corta, por ser la más rígida (ofrece mayor restricción al desplazamiento), en proporción con la columna larga, la fuerza en la columna corta es:
(Altura de Columna larga / Altura de la Columna corta)^3
¿Cuál es la importancia de este tema?
Durante un sismo estas cortas siempre se explotan, pues dada su rigidez toman la mayor parte de la fuerza del sismo.
A veces la columna corta se genera por una disposición inapropiada de las paredes.

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