THE EFFECT OF CORROSION ON THE SLIP COEFFICIENT OF HIGHSTRENGTH BOLTED FRICTIONAL JOINTS

Abstract

This study investigated the impact of rough corrosion irregularities on the slip coefficient in high-strength bolted frictional joints of corroded railway bridges. Slip tests were conducted using test specimens joined by connecting plates coated with corrosion steel materials and inorganic zinc-rich paint. Some test specimens were re-exposed to assess the corrosion condition of the joint surface and changes in the slip coefficient. The slip coefficient using corrosion steel materials was below 0.40, and after approximately three years of re -exposure, there was a 20% increase in the slip coefficient compared to before exposure.