Hall, John F. and Ryan, Keri L. (2000) Isolated Buildings and the 1997 UBC Near-Source Factors. Earthquake Spectra, 16 (2). pp. 393-411. ISSN 8755-2930. doi:10.1193/1.1586118. https://resolver.caltech.edu/CaltechAUTHORS:HALes00
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Abstract
Computer simulations are employed to assess the effects of near-source ground motions on base-isolated buildings that meet the provisions of the 1997 Uniform Building Code. A six-story base-isolated building designed for Nv = 1.6 exhibits essentially elastic structural behavior when subjected to six actual ground motions containing strong near-source effects. However, two simulated records, one intended to represent the most severe motions from the 1994 Northridge earthquake and the other a strong motion from a hypothetical Mw7.0 thrust earthquake produce larger responses well into the nonlinear range. In addition, a 113 cm ground displacement pulse of three-second duration, which is close to the period of the isolated buildings, causes story drifts of nearly 5% for the Nv = 1.6 design and over 2% for a stronger Nv = 2 design. Such drifts are effectively reduced when supplemental dampers are added alongside the isolators. The original Nv = 1.6 design with supplemental damping in the amount of 20% of critical experiences only 1.3% drift for the same three-second ground displacement pulse.
Item Type: | Article | ||||||
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Additional Information: | ©2000 Earthquake Spectra. | ||||||
Subject Keywords: | Uniform Building Code (UBC); 1997 edition, United States; building codes, Base isolation; near-field ground motion, Rubber bearings; nonlinear response, Multistory moment-resisting frames; story drift, Northridge, California earthquake, Jan. 17, 1994 | ||||||
Issue or Number: | 2 | ||||||
DOI: | 10.1193/1.1586118 | ||||||
Record Number: | CaltechAUTHORS:HALes00 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:HALes00 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 10584 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Archive Administrator | ||||||
Deposited On: | 20 May 2008 | ||||||
Last Modified: | 08 Nov 2021 21:09 |
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