Experimental study of steel tube panel under in-plane lateral cyclic load

This paper presents the results of experimental tests of four steel tube panel called “-Lateral-Load-Resisting-System (LLRS)” under in-plane lateral cyclic load. The system consisted in a frame with two columns, a beam at the top, and a welded grid of cold-formed steel tubes joined tangentially to the boundary elements. Beam and Columns were welded using cold-formed steel (CFS) profiles, and they were filled with concrete. The study focuses on the analysis of the tangent and secant stiffness on every cycle of loading, elastic and plastic energy, and the dissipated energy of this system.