Download - schemi strutturali e nodi
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Profilati a caldoPer estrusione
Profilati a freddo Sagomati da lamiere sottili
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IPE HE Hmax=600mmHEA, HEB, HEM
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• I profilati angolari (aste tese e compresse strutture reticolari)• I profilati T, INP, IPE(elementi inflessi, travi)• I profilati HE(buona resistenza a carico di punta, pilastri)• Tubolari(elevata inerzia)• Profilati a freddo(lamiera di piccolo spessore, elevata inerzia a basso peso)
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Caratteristiche meccaniche (t<40mm)• (FE 360) S235Tensione di snervamento>235N/mmqTensione ultima= 360N/mmq• (FE 430) S275Tensione di snervamento>275N/mmqTensione ultima= 430N/mmq• (FE 510) S355Tensione di snervamento>355N/mmq Tensione ultima= 510N/mmq• S450Tensione di snervamento>440N/mmq Tensione ultima= 550N/mmq
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Unioni di profili d’acciaio:
Bullonatura(mediante dadi e bulloni unificati)
Saldatura(mediante arco elettrico )
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Bulloni ad alta resistenza
serrati con chiave dinamometricaviene applicata una coppia di serraggio elevataunione per attrito
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SaldaturaMediante arco
elettricoe materiale di
unioneSu profilo
cianfrinato
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I pilastri si suddividono in
Semplici e composti
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Le travi possono essere• Con elementi pieni • Con strutture reticolari
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Schemi strutturali
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Controventamenti verticali
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Controventamenti orizzontali
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Unione pilastro-pilastro
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Unione travi pilastri 1-2 nodo cerniera 3-4 nodo semi-incastro
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Unione travi pilastri (nodo incastro)
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Unione trave trave
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Unione trave trave
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Controventamenti orizzontali
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Controventamenti verticali
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Unione pilastro-fondazione
Sono in generale formati da due parti: una in acciaio collegata al pilastro ed una in cls poggiante sul terreno (dado).
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Nodo incastro pilastro fondazione
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Nodo cerniera pilastro fondazionecon controventamento
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Sistemi di ancoraggio delle basi dei pilastri in acciaio al dado in cls
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Cerniera – semi incastro - incastro