Abstract
Fire-induced collapse behaviors of a high-rise building with an outrigger truss system were verified using the ASI-Gauss technique. The effects of fire patterns and structural parameters on the redundant strengths were surveyed by observing the collapse initiation time: the duration from the beginning of the fire until collapse initiation. From the numerical results, it is confirmed that collapse initiation times are significantly affected by the member joint strengths if the axial force ratio is small on the condition that the fire pattern is nearly symmetrical, and the load paths to and from the outrigger truss system are sufficiently protected.
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