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Abstract

This report documents a new test procedure for defining the vulnerability of critical equipment to earthquake and other transient support motions. The CERL Equipment Fragility and Protection Procedure (CEFAPP) defines the capacity of equipment to withstand transient support motion in terms of amplitude versus frequency. The amplitude is the support motion or response spectrum amplitude at which failure occurs. Failure may comprise actual mechanical damage, temporary loss of function, acceleration or strain levels at critical locations, or any other user defined criteria. The frequency content of support motion is critical as it determines the manner (modes) in which equipment responds and fails. CEFAPP requires narrow-band random sweep tests. These tests consist of random motions concentrate

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