Evaluation of modal pushover-based scaling of one component of ground motion: Tall buildings
Earthquake Spectra
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Abstract
Nonlinear response history analysis (RHA) is now increasingly used for performance-based seismic design of tall buildings. Required for nonlinear RHAs is a set of ground motions selected and scaled appropriately so that analysis results would be accurate (unbiased) and efficient (having relatively small dispersion). This paper evaluates accuracy and efficiency of recently developed modal pushover–based scaling (MPS) method to scale ground motions for tall buildings. The procedure presented explicitly considers structural strength and is based on the standard intensity measure (IM) of spectral acceleration in a form convenient for evaluating existing structures or proposed designs for new structures. Based on results presented for two actual buildings (19 and 52 stories, respectively), it is demonstrated that the MPS procedure provided a highly accurate estimate of the engineering demand parameters (EDPs), accompanied by significantly reduced record-to-record variability of the responses. In addition, the MPS procedure is shown to be superior to the scaling procedure specified in the ASCE/SEI 7-05 document.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evaluation of modal pushover-based scaling of one component of ground motion: Tall buildings |
| Series title | Earthquake Spectra |
| DOI | 10.1193/1.4000091 |
| Volume | 28 |
| Issue | 4 |
| Year Published | 2012 |
| Language | English |
| Publisher | Earthquake Engineering Research Institute |
| Contributing office(s) | Earthquake Science Center |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Earthquake Spectra |
| First page | 1469 |
| Last page | 1493 |
| Country | United States |
| Google Analytic Metrics | Metrics page |