Seismic response of slender MDOF structures with self?centering base shear and moment mechanisms

As the amplification of seismic force demands due to higher-mode effects on tall buildings is increasingly recognized as a design challenge, number high-performance systems have been proposed limit such through combined base shear-limiting and moment-limiting dual mechanisms. To better understand influence these overall behavior buildings, this paper presents study response Multi-Degree-of-Freedom (MDOF) incorporating For an MDOF system with given initial period strength level, mechanism defined by shear factor, inelastic stiffness parameter, energy-dissipation while moment factor. determine parameters responses structures, comprehensive parametric was conducted, results were presented discussed in terms displacement rotation demands, demand at along height, peak floor acceleration, roof drift, absorbed energy. The numerical modeling methodology used validated against 200 small-scale shaking table tests scaled specimen dual-mechanism model structures that are representative periods ranging from 1.0 10 s having various base-mechanism properties. then conducted using ensemble 20 Ground Motions (GM) three code-specified hazard levels for Los Angeles, California. can be facilitate mitigating enhancing resilience buildings.