Experimental and Numerical Investigation of Cross-Shaped Joints with Adjustable Stiffness for Cold-formed Thick-Walled Steel Column–Column Connections

다국어 초록 (Multilingual Abstract)

Cold-formed thick-walled steel members have a higher bearing capacity and wider applicability in the mid-rise buildings in comparison with the widely-used cold-formed thin-walled steel framing walls in low-rise buildings. To avoid the shortcomings of cold-forming eff ect, a structure with hinged or semi-rigid joint steel frame using cold-formed thick-walled steel and cold-formed thin-walled steel framing shear wall is one reasonable choices, and it will be very helpful to simplify the on-site assembling processes. In this paper, a cross-shaped joint with adjustable stiff ness was proposed, and better seismic performance was investigated and confi rmed by tests. By increasing the thickness of the web plates of the cross-shaped joint, the bearing capacity, stiff ness, and ductility of the joint can be signifi cantly improved, and the buckling deformation of the web plate will be reduced. Moreover, a strengthening stiff ener, Type 2 proposed in the paper, has a signifi cantly eff ect on the cross-shaped joint for seismic damage and intact specimens. Using ANSYS software and the SOLID185 element, a fi nite element model was established. With the increasing thickness of the end plate of the stiff ener Type 2, both the stiff ness and bearing capacity of the cross-shaped joint can be signifi cantly increased.