균형계수를 적용한 특수중심가새골조의 내진설계 모델

Reliable seismic performance requires a structural system that can withstand multiple inelastic displacement cycles at large drifts. Theresponse of a steel frame systems is largely dependent on the inelastic deformation capacity of the frame members. Recent studies on theseismic performance of moment-resisting frames have shown that limited yielding is allowed at connections including beams, and thatimproved behavior, including increased ductility, can be achieved when the resistance of these yielding mechanisms is properly balanced. Theadverse effects of premature failure are controlled by balancing the failure modes and the yielding mechanisms. This paper aims to improvethe seismic response of a concentrically braced frame system by presenting a design methodology that balances the yielding mechanisms andthe failure modes. Using past experimental results, an improved design model for braced frame gusset plate connections is developed andpreliminary estimates of the required design parameters are provided.