Abstract
"Cold-formed steel (CFS) self-drilling screw connections are popular in the construction industry due to rapid fastening and ease of installation. However, the corrosion damage of CFS structures can significantly reduce mechanical properties, affecting the safety and durability of such structures. Therefore, this research investigates the effect of corrosion on the behavior of CFS connections experimentally. This paper presents a total of 36 new experiments on different types of CFS self-drilling screws (12 and 14 gauge) and steel sheet thickness (2.5 mm). Half of the tests were for corroded specimens, and the remaining half were for non-corroded specimens. Further, one to two screws per arrangement connecting the steel sheets with a yield strength of 450MPa were tested. Screws were immersed for 31 days, and the CFS plates were immersed for 8 weeks in a corrosion chamber before the tests were conducted. The experimental tests found that the shear strength of single-screw and double-screw specimens was reduced by 43%, on average for all investigated screw series."
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