Study On Seismic Performance Of Composite Wall Of Cold-formed Steel Structure Residential Building

In recent years, cold-formed steel structure residential building system began to be applied in the domestic. Composite wall is the main load-bearing components of cold-formed steel structure residential building system. On the wind, earthquake research of cold-formed steel structure residential building, and shear performance of composite wall of cold-formed steel structure frame has been a concern of many scholars at home and abroad. However, studies of this system have just started in the domestic. On the seismic performance of composite wall is one of key technologies, and needs further be studied.In order to study seismic performance of composite wall of cold-formed steel structure residential building, four composite walls were tested with vertical and horizontal low cycled reversed loading. Section size of frame column of composite wall, single side and double side sheathing of composite wall were considered. The seismic bearing capacity, displacement ductility factor, and seismic energy coefficient of several indicators were studied.Based on seismic performance tests of the cold-formed steel residential walls, the finite element simulation of the composite wall was done. Three-dimensional parameterized finite element model of composite wall of cold-formed steel structure residential building was established by ANSYS finite element software. Experimental results and finite element simulation results agree well and indicate that: according to experimental connection and in the conditions of meeting carrying capacity, the increasing size of the combination wall frame section has no effect to improve the seismic bearing capacity of the wall, but the ductility factor and energy coefficient are improved. The seismic bearing capacity of combination wall of the both sides is about twice that of composite wall of a single, and the ductility factor and seismic energy coefficient are improved.The results of this study have a certain reference value to application and development of composite wall of cold-formed steel structure residential building in the future.