Method for increasing the energy dissipation capacity of T-stub connections

Abstract

T-stub connections display different behavior patterns and failure modes depending on the changes in the thickness and length of the T-stub, the diameter and number of fasteners, and the gauge distance of the fastener constituting the connections. In addition, T-stub connections subjected to axial cyclic loading exert different energy dissipation capacities according to the combination of these variables. Since an increase in the energy dissipation capacity of T-stub connections leads to an improvement in the seismic performance of steel structures composed of these connections, it is necessary to seek methods of improving the energy dissipation capacity of T-stub connections. This study attempted to explore ways of improving seismic performance by evaluating the energy dissipation capacity of T-stub connections with a variety of geometric shapes and material properties. The energy dissipation capacity and deformation characteristics of the connections were investigated by performing finite element analysis on the T-stub connections using shape memory alloys and steel for general building structures.