Report - PEER - University of California, Berkeley

spectra is several times larger than the ground spectra. For building contents subjectto sliding and toppling, the EDP-N may be more associated with peak floor velocity.A second class of EDP-Ns which will be investigated are those associated withcalculated analysis determination. For example, a significant EDP-N is likely to bethe inelastic rotation of a pipe joint where the input to the pipe stress analysis is floorspectra and relative displacements of the floors.32.5Ground 5% DampingRoof 5% Damping2SA (g)1.510.500 1 2 3 4 5 6Period (Seconds)Figure 2. Measured 5 % damped elastic response spectra —19-story bldg.3.2 Identify and Categorize Significant Nonstructural Systems andComponentsAs noted earlier, nonstructural components includes all items attached to or containedwithin a building other than the primary structural system. There are really countlesstypes of nonstructural systems and components and it would be impractical to developa performance prediction methodology that explicitly considered all the componentsthat exist in any one building let alone the entire inventory of buildings that must beaddressed. However, it should be possible to identify certain components and systemsthat that have particularly important and significant consequences with regard to lifeloss or serious injury, repair costs and downtime and categorize them into severalbroad group which have similar performance characteristics and engineering demandparameters. Similarly it should be possible to identify components which have alesser impact and to similarly categorize them.131