Fragility of Hydraulic Elevators for Use in Performance‐Based Earthquake Engineering | CU Experts

; New performance‐based earthquake engineering methods developed by the Pacific Earthquake Engineering Research Center, the Applied Technology Council, and others include damage analysis at a highly detailed level, requiring the compilation of fragility functions for a large number of damageable generic structural and nonstructural components. This brief paper presents the development of a fragility function for hydraulic elevators. It uses post‐earthquake survey data from 91 elevators in nine California locations after two earthquakes. Surveys were used to collect data on facilities and elevators. Ground‐motion records from the California Integrated Seismic Network were used to estimate engineering demands at each site. Binary regression analysis was used to fit a fragility function, which takes the form of a lognormal cumulative distribution function with median value of; PGA; =0.42; g; and logarithmic standard deviation of 0.3. The fragility function appears to be reasonable based on four criteria.;

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