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Friction Coefficient of Hot-Dip Galvanized Fittings--FRICTIONAL-CO

Author: hirocherry7312Executions: 253
TOP/Shared Formulas (Engineering)/Civil & Mechanical

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Verification of the slip coefficient test specimens for hot-dip galvanized fittings and the coefficient of friction (0.4 or higher)
Yield strength of the members (SS400 = 235 N/mm² or SM490 = 325 N/mm²), two-surface joint of the hot-dip galvanized surfaces
Calculate μ = P / (m × n × N); however, if the plate width is inappropriate, the member must not yield and become thinner before slippage occurs
[110,325] ZINC HOT-DIP GALVANIZING FRICTIONAL COEFFICIENT = RATIO
μx = (W - (Φ + 3)) × T1 × σy / (m × n × N)
W (plate width of the sliding test joint, mm), Φ (nominal diameter of F8T galvanized high-strength bolts, mm), T1 (thickness of the test specimen, mm), σy (yield strength of the test specimen, N/mm²),m (number of friction surfaces), n (number of tightening bolts), N (standard bolt tension in N); the numerator is the load at the onset of slippage in the joint, and the denominator is the friction joint strength (m × n × N).
W
Φ
T1
σy
m
n
N
μx 
The standard bolt tension values for high-strength plated bolts are: 133 kN (12GSHTB16), 2,076 kN (12GSHTB20), 256 kN (12GSHTB22), and 299 kN (12GSHTB24).
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