Experimental evaluation of four ground-motion scaling methods for dynamic response-history analysis of nonlinear structures
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Abstract
This paper experimentally evaluates four methods to scale earthquake ground-motions within an ensemble of records to minimize the statistical dispersion and maximize the accuracy in the dynamic peak roof drift demand and peak inter-story drift demand estimates from response-history analyses of nonlinear building structures. The scaling methods that are investigated are based on: (1) ASCE/SEI 7–10 guidelines; (2) spectral acceleration at the fundamental (first mode) period of the structure, Sa(T1); (3) maximum incremental velocity, MIV; and (4) modal pushover analysis. A total of 720 shake-table tests of four small-scale nonlinear building frame specimens with different static and dynamic characteristics are conducted. The peak displacement demands from full suites of 36 near-fault ground-motion records as well as from smaller “unbiased” and “biased” design subsets (bins) of ground-motions are included. Out of the four scaling methods, ground-motions scaled to the median MIV of the ensemble resulted in the smallest dispersion in the peak roof and inter-story drift demands. Scaling based on MIValso provided the most accurate median demands as compared with the “benchmark” demands for structures with greater nonlinearity; however, this accuracy was reduced for structures exhibiting reduced nonlinearity. The modal pushover-based scaling (MPS) procedure was the only method to conservatively overestimate the median drift demands.
Suggested Citation
O’Donnell, A.P., Kurama, Y.C., Kalkan, E., Taflanidis, A.A., 2017, Experimental evaluation of four ground-motion scaling methods for dynamic response-history analysis of nonlinear structures: Bulletin of Earthquake Engineering, v. 15, no. 5, p. 1899-1924, https://doi.org/10.1007/s10518-016-0052-z.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Experimental evaluation of four ground-motion scaling methods for dynamic response-history analysis of nonlinear structures |
| Series title | Bulletin of Earthquake Engineering |
| DOI | 10.1007/s10518-016-0052-z |
| Volume | 15 |
| Issue | 5 |
| Publication Date | December 02, 2016 |
| Year Published | 2017 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | Earthquake Science Center |
| Description | 26 p. |
| First page | 1899 |
| Last page | 1924 |