Seismic design of non-dissipative embedded column base connections

Embedded Column Base (ECB) connections in seismically resistant steel moment frames are commonly designed to be stronger than the connected column, protect them from inelastic actions. This relies on estimation of demands induced by column and strength capacity themselves. However, recent research indicates that prevalent approaches may unconservative for both demand estimation, with consequence unintended damage/failure connection. Motivated above, this (1) characterizes seismic ECB connections, (2) evaluates various models these support improved design approaches. is done through a virtual test program uses validated continuum finite element simulations interactive column-ECB subassemblies. The results suggest current unconservative, i.e., they underestimate while also overestimating resistance, possibility unintentional nonlinear behavior within embedded portion undesirable, because not usually detailed provide plastic deformation capacity. A method proposed estimates anticipated flexural non-dissipative along recommendations regarding models. To accomplish this, incorporates local cross-sectional slenderness, gravity-induced axial load conjunction combinations imposed standards. sensitivity material grade, loading history, studied, limitations approach outlined.