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The shear resistance per shear plane and per bolt is given by :
for bolt grade 4.6, 5.6 and 8.8 :
for bolt grade 4.8, 5.8 and 10.9 :
with
|
As |
the tensile stress area of bolt |
|
fub |
the ultimate tensile strength of bolt |
|
γM2 |
the partial safety factor for resistance of bolts |
|
βLf |
the reduction factor for long joints |
|
Fv.Rd |
the shear resistance |
with
|
d |
the bolt diameter |
|
Lj |
the connection length |
The design preloading force Fp,Cd is given by
with
|
fub |
the tensile strength of the bolt |
|
As |
the tensile stress area of the bolt |
The design slip resistance of preloaded high-strength bolt Fs,Rd is given by
with
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n |
the number of friction interfaces |
|
ks |
the value for slip resistance(=1.0 for holes with standard nominal clearances) |
|
μ |
the slip factor |
|
γM3 |
the partial safety factor for slip resistance |