Seismic Performance of Tall Steel Framed Buildings Built Between 1960 -1994

摘要

The 25th anniversary of the 1994 Northridge Earthquake and recent articles in the New York Times have highlighted the potential vulnerability of tall steel-framed buildings to large earthquakes in California. Some of the material in that article was taken from results reported in the "Haywired" Scenario reports published by USGS (Detweiler et al, 2018). This presentation will focus on the seismic performance of tall steel framed structures designed between 1960 and 1990. The presentation will discuss how the design and detailing of these buildings evolved and why it is difficult to draw broad conclusions about the performance of this entire class of buildings. Case studies of more than thirty such buildings, with about half evaluated using nonlinear response history procedures, are used to illustrate different seismic performance features of these buildings and present some observations about the buildings' performance.