Scaling earthquake ground motions for performance-based assessment of buildings
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Abstract
The impact of alternate ground-motion scaling procedures on the distribution of displacement responses in simplified structural systems is investigated. Recommendations are provided for selecting and scaling ground motions for performance-based assessment of buildings. Four scaling methods are studied, namely, (1) geometric-mean scaling of pairs of ground motions, (2) spectrum matching of ground motions, (3) first-mode-period scaling to a target spectral acceleration, and (4) scaling of ground motions per the distribution of spectral demands. Data were developed by nonlinear response-history analysis of a large family of nonlinear single degree-of-freedom (SDOF) oscillators that could represent fixed-base and base-isolated structures. The advantages and disadvantages of each scaling method are discussed. The relationship between spectral shape and a ground-motion randomness parameter, ε, is presented. A scaling procedure that explicitly considers spectral shape is proposed.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Scaling earthquake ground motions for performance-based assessment of buildings |
| Series title | Journal of Structural Engineering |
| DOI | 10.1061/(ASCE)ST.1943-541X.0000155 |
| Volume | 137 |
| Issue | 3 |
| Year Published | 2011 |
| Language | English |
| Publisher | American Society of Civil Engineers |
| Description | 11 p. |
| First page | 311 |
| Last page | 321 |
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