Simplified R-Factor Relationships for Strong Ground Motions-Reference-Cited by-同舟云学术

Simplified R-Factor Relationships for Strong Ground Motions

Published:2003-02 Issue:1 Volume:19 Page:25-45
ISSN:8755-2930
Container-title:Earthquake Spectra
language:en
Short-container-title:Earthquake Spectra

Author:

Cuesta Isabel¹,Aschheim Mark A.²,Fajfar Peter³

Affiliation:

1. Los Alamos National Laboratory, P.O. Box 1663, MS C926, Los Alamos, NM 87545

2. University of Illinois at Urbana-Champaign, 205 North Mathews, Urbana, IL 61801

3. Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, SI-1000 Ljubljana, Slovenia

Abstract

Recent studies have demonstrated the need to consider the ground motion frequency content in the development and use of R−μ−T relationships. Results from two different approaches to determining these relationships are unified in the present paper. Two bilinear R−μ−T/Tgrelationships are recommended for most strong ground motions and structural systems. One is more accurate, while the other, more conservative relationship is used in FEMA 273, ATC-32, and the simple version of the N2 method. Both relationships are indexed by the characteristic period of the ground motion, Tg. Simple methods to determine Tgfrom smoothed design spectra and recorded ground motions are provided. Neither recommended relationships are applicable to the nearly harmonic ground motions that may be generated at sites containing soft lakebed deposits. An example illustrates the application of these relationships to a code design spectrum in both the acceleration-displacement and yield point spectra formats.

Publisher

SAGE Publications

Subject

Geophysics,Geotechnical Engineering and Engineering Geology

Link

http://journals.sagepub.com/doi/pdf/10.1193/1.1540997

Reference31 articles.

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3. ATC, 1999.Evaluation of Earthquake Damaged Concrete and Masonry Wall Buildings-Technical Resources, FEMA 307, Federal Emergency Management Agency, Washington, DC, May.

4. Yield Point Spectra for Seismic Design and Rehabilitation

5. Building Seismic Safety Council (BSSC), 1998.NEHRP Recommended Provisions for Seismic Regulations for New Buildings and Other Structures, Part 1—Provisions,FEMA 302, Federal Emergency Management Agency, Washington, DC.

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