This paper presents and discusses the results of a numerical study on seismic deformation demand to thin-walled cold-formed structures. The primary objective of this research project was to assess the lateral performance and behavior of these structures when subjected to earthquake loading. The research involves an extensive racking testing program on two-dimensional framing configuration.
The outcomes are from 2.4 x 2.4m shear walls with five cold-formed steel stud wall and categorized into five different shear resisting system: Type A there are three walls with the attachment of X-bracing on the 2nd and 4th studs, two from Type A shear walls attached with a 10mm gypsum board while another one without gypsum board. Type B the wall is fixed with 10mm of gypsum board without bracing. Type C there are three walls in this type and they are connected with brackets at each corner with X-bracing attached on the brackets and edges. Two from type C attached with gypsum board but with the difference of having single and double brackets while another one with single brackets and no involvement of gypsum board. Type D there are two types with Xbracing at corners but with the difference of the involvement of gypsum board. Type E contains X-bracing attached on gusset plates at each corner.
In this research, it is concluded that the steel frames perform very well under earthquake loads where most of them are able to displace at least 70mm before failure. X-bracing makes a significant contribution to the lateral loading on the walls. Theoretically, the walls must fail with a sequence of X-bracing failure followed by connection then wall studs. From the comparison of kind of arrangements, walls types C behave similar with the theoretical approach and come out with a good result of yielding of X-bracing and minimize the buckling modes but with a lower loading of 5kN.m