by Farzad Naeim, Roy Lobo, Konstantinos Skliros and Marcello Sgambelluri
Naeim, Farzad, Roy Lobo, Konstantinos Skliros and Marcello Sgambelluri (1999). Seismic Performance of Four Instrumented Steel Moment Resisting Frame Buildings during the January 17, 1994 Northridge Earthquake. SMIP99
Seminar on Utilization of Strong-Motion Data, p. 51 - 82.
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This paper presents a summary of our comprehensive evaluation of the seismic performance of four instrumented steel
moment resisting frame buildings during the 1994 Northridge earthquake. The buildings were inspected and repaired,
where necessary, according to the requirements of he FEMA-267 Interim Guidelines [FEMA, 19951. The basic premise of
performance based seismic engineering is the ability to predict performance given the base earthquake ground motion
and building characteristics. These four buildings provided a perfect vehicle to compare the current status of analytical
abilities versus this basic requirement for achieving a meaningful performance based design. To this end, not only we
developed and studied numerous linear and nonlinear, static and dynamic computer models of these buildings, but we
evaluated the relevant provisions of the leading traditional as well as performance based codes and standards. As this
paper indicates, we are not far from the ability to understand, model, and explain global performance of structures.
However, we are farther away from accurate prediction of location and extent of local damages within a structure. It is
hoped that future work by us and other researchers will remedy this shortcoming in the near future.