Discover and read the best of Twitter Threads about #structures

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¡Empezamos! Repasemos algunas de las vigas y celosías más comunes.

Todas ellas son de un vano y tienen condiciones de apoyo isostáticas, esto es, un apoyo fijo y otro deslizante.

#estructuras #ingenieria #IngenieriaCivil #CivilEngineering #structures
Si a una de estas vigas (he escogido la celosía Warren) le doy una ligera curvatura, el comportamiento estructural de la misma apenas diferirá de la versión recta. Esto es porque las condiciones de apoyo son isostáticas.
En otras palabras, el momento que solicita a la viga en el centro de luz, el famoso p*l2/8, es el mismo en ambos casos.

Recordad que una viga curva solo activa su comportamiento de arco si ambos apoyos son fijos, lo que no es el caso de la figura.
Read 19 tweets
A este hilo le vamos a colgar un peso (saquito). Este hilo adquirirá una forma como la representada.
Seguimos. Si al hilo le colgamos dos pesos más, este adquirirá esta otra forma...más o menos.
Read 40 tweets
So many of these stories are so sad & paint a bleak portrait of UK culture of infant feeding, with poor support for #breastfeeding (so few successes) & awful stigmatization. The pivotal question is *why* this is - something I saw little attention to in the linked article.
UK women are not fundamentally different from nearby others who have much higher #breastfeeding rates. It is not women "failing" - these are not issues of #individualresponsibility. They are matters of #structures & #culture that facilitate or hinder #breastfeeding.
True support requires not simply telling people what to do, but enabling, supporting, and facilitating. That means committing resources (financial & social) to making change. Supporting families in making an informed decision, and then supporting them throughout.
Read 12 tweets

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