Testing of a Novel Induction Heat Treated Steel Brace with Enhanced Buckling Behaviour

Abstract Steel braces are widely used to stabilize steel structures forming horizontal or vertical truss structures; however, their relatively poor buckling behaviour is often lead overdesigned structures. Induction Heat (IH) treatment technology a novel contactless material transformation process effectively strengthen local areas of sections. Utilizing IH increase the strength middle length brace sections, can be improved. The present study experimentally investigates compression fabricated by IH‐treated circular hollow A Digital Image Correlation (DIC) system measure experimental deformation quantities, such as axial displacements, out‐of‐plane deformations, and strain distributions along length. Four specimens were tested with two set different slenderness ratios (λ). Each includes one conventional (CSB) (IHSB) stronger section at its mid‐length. subjected monotonic displacement‐controlled loading history until reaching an compressive 2.5%. It was found that load up 20% in IHSBs. also beneficial improving post‐buckling brace. more than double IHSBs CSBs ductility level 5 (ductility defined ratio target displacement yielding displacement). Moreover, displacements reduced 28% for 1% showing evenly distribution demands