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Fragility of Hydraulic Elevators for Use in Performance-Based Earthquake Engineering

Porter, Keith (2007) Fragility of Hydraulic Elevators for Use in Performance-Based Earthquake Engineering. Earthquake Spectra, 23 (2). pp. 459-469. ISSN 8755-2930. doi:10.1193/1.2720902.

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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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Additional Information:©2007 Earthquake Engineering Research Institute (Received 8 May 2006; accepted 4 October 2006) This work was supported primarily by the Earthquake Engineering Research Centers Program of the National Science Foundation, under award number EEC-9701568 through the Pacific Earthquake Engineering Research Center (PEER). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect those of the National Science Foundation. Thanks also to Anshel Schiff for information about differences between elevators in hospitals and those in other facilities.
Subject Keywords:lifts; earthquake engineering; performance evaluation; regression analysis; hydraulic control equipment
Issue or Number:2
Record Number:CaltechAUTHORS:PORes07b
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8471
Deposited By: Archive Administrator
Deposited On:16 Aug 2007
Last Modified:08 Nov 2021 20:50

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