CIVL439/WOOD476 2003 Group effects Group effects in bolted connections 55℃ End distance effect Group effects in bolted connections Loaded end distance factor Row factor J=1.0 for e=10d Jg=1.0 for I row =0.75 for e=7d =0.8 for 2 rows(2or more bolts in row) Load -0.6 for 3 rows (2 or more bolts in row) 000 Displacement 000 Group effects Lag Screws Similar to single shear bolt connection Use Johansen yield model Penetration length main member thickness 6
CIVL439 / WOOD476 2003 6 Group effects Auditorium University of Northern BC Prince George Group effects in bolted connections Factor to account for no. of bolts in a row JG = 0.33 (l/d)0.5 (s/d)0.2 N-0.3 < 1.0 End distance effect Loaded end distance factor JL = 1.0 for e = 10d = 0.75 for e = 7d Load Displacement e > 10d e = 10d e = 7d Group effects in bolted connections Row factor JR = 1.0 for 1 row = 0.8 for 2 rows (2 or more bolts in row) = 0.6 for 3 rows (2 or more bolts in row) Group effects Lag Screws Similar to single shear bolt connection Use Johansen yield model • Penetration length = main member thickness Also have substantial withdrawal resistance (Prw)
CIVL439/WOOD476 2003 Split Rings and Shear Plates 脚 Split Rings and Shear Plates High strength fasteners splat ring Installation of Split Rings and Shear Plates Shear plate installation Installation special tool Load Splt Rings and Shear Plates Large split ring connections ◆Stress conditions ◆Failure mod 7
CIVL439 / WOOD476 2003 7 Split Rings and Shear Plates High strength fasteners • Provide larger grip surface on wood Wood failure modes typical shear plates split ring Split Rings and Shear Plates Installation of Split Rings and Shear Plates Installation: • special tools • tight fit • ideal for pre-fabrication Shear plate installation Load transfer with Split Rings and Shear Plates Large split ring connections