Rothoblaas - Holzschrauben und -Verbinder Page 73
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BERECHNUNGSBEISPIEL: VERBINDUNG SPARREN - PFETTE MIT MYPROJECT VERBINDUNG HOLZ-HOLZ/EINSCHNITTIGE VERBINDUNG 1 ELEMENT 1 2 ELEMENT 2 1 B1 = 120 mm B2 = 200 mm H1 = 160 mm H2 = 240 mm Neigung 30% (16,7°) Neigung 0% (0°) Holz GL24h 2 Holz GL24h PROJEKTDATEN SCHRAUBENAUSWAHL GEOMETRIE DER VERBINDUNG Fv,Rd = 1,89 kN TBS = 8x260 mm t 1 = 160 mm Nutzungsklasse = 1 Vorbohrung = nein α 1 = 0° t2 = 100 mm (Einschraubtiefe bei Element 2) Lasteinwirkungsdauer = kurz α 2 = 90° BERECHNUNG DER SCHERFESTIGKEIT MIT DER SOFTWARE MYPROJECT (EN 1995:2014 e ETA-11/0030) d1 My,k = 20,1 Nm fh,1,k = 16,92 N/mm2 Rax,Rk = min {Gewindeausziehwiderstand, Kopfdurchzugswert} = min {Rax,Rk ; Rhead,Rk} = 4,09 kN fh,2,k = 16,92 N/mm2 Rax,Rk/4 = 1,02 kN (Einhängeeffekt) β = 8,0 mm = 1,00 Rv,Rk = 3,71 kN k R Rv,Rd = v,Rk mod γM EN 1995:2014 kmod = 0,9 γM = 1,3 Rv,Rd = 2,56 kN > 1,89 kN OK Italien - NTC 2018 kmod = 0,9 γM = 1,5 Rv,Rd = 2,22 kN > 1,89 kN OK HOLZBAU | TBS | 73
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