The Research On Horizontal Capacity Of Residential Cold-formed Thin-wall Steel Structures

In recent years, with its unique characteristics residential cold-formed thin-wall steel structure is generally welcomed by the users. However, the structural system for application in the region of high intensity earthquake there are many issues to be addressed. Especially the structural response of seismic and wind load need further study.This thesis introduces the origin and development of the cold-formed steel structure housing and its advantages and disadvantages. It gives some simple linking method for the components and nodes. Then the flexible lateral rigidity of single-story and two-story X-crossed bracing is deduced. Reference to the Foschi's wooden walls calculating method of lateral rigidity, it gives the calculating method of horizontal capacity on the single cold-formed steel-skin wall. Using the software ETABS, analyses a cold-formed steel structure villa in flexibility condition, it has got some overall structure data and internal force of the components. At the same time, It introduces the finite element analysis software ETABS and calculating method of the horizontal seismic force and wind force, calculates the load imposed on the structure in detail.Finite element analysis is an important research approach in structural analysis field. It can accurately analyse the mechanical property of large-size and complex constructions in many projects which may be difficult to be determined by conventional means. In this thesis, as the first attempt, using ETABS, a computer model of the cold-formed steel structure villa is established. It puts important on analysing the modes and displacement of structure under the horizontal seismic load, the floor shear and bracing internal force under the horizontal seismic load and wind load. It conducted a preliminary study about the seismic performace of the cold-formed steel structural villa.