Robustness of Prototype Steel Frame Buildings against Column Loss: Assessment and Comparisons

摘要

Modeling approaches for analyzing the robustness of steel moment-frame and braced frame buildings against column loss are presented, including the nonlinear behavior and failure of the shear and moment connections and the effect of the composite floor slab. For the braced-frame buildings, modeling of the buckling behavior of braces incorporates nonlinear rotational springs representing the out-of-plane behavior of the gusset-plate connections. These approaches are used to analyze the nonlinear system behavior of 10-story prototype steel moment frame and braced frame buildings under column loss scenarios. Analysis results are presented, and the behavior of braced frame and moment frame buildings under column loss is compared.