Ponte ad arco - puzzle online
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Puzzle online Ponte ad arco
Un ponte ad arco è un ponte fisso il cui impalcato è retto da una struttura ad arco. Questo schema statico consente di trasferire parte del suo peso e dei suoi carichi (come persone, auto o treni) in forze orizzontali, contrastate dai piedi di entrambe le sponde.
Può essere realizzato in legno strutturale, come si è fatto fin dagli albori della civiltà per ponti di breve sviluppo, oppure muratura, calcestruzzo armato o acciaio ; su ponti di grandi dimensioni l'unica alternativa praticabile è l'uso di travi metalliche.
Lo sviluppo dell'arco può essere circolare (arco di cerchio ) o può seguire un'altra conica, quale ad esempio una parabola.